Provided is a light information device, and the like, that records header information on an information recording medium, after preventing screen burn of a spatial light modulator. One example of the solution in the present invention is a light information device that records two-dimensional page data on an information recording medium and is provided with a first information generation unit, a second information generation unit that generates a second bit string on the basis of a first bit string, and a spatial light modulation unit that displays a pattern corresponding to the second bit string. The second information generation unit: performs a first processing, on the first bit string corresponding to first identification information, that inverts each bit at a prescribed cycle; generates the second bit string corresponding to the first identification information; performs a second processing, different from the first processing, on the first bit string corresponding to second identification information that includes bits which are switched at the same cycle as the prescribed cycle; and generates the second bit string corresponding to the second identification information.
G11B 7/00 - Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation, reproducing using an optical beam at lower power; Record carriers therefor
G11B 7/0065 - Recording, reproducing or erasing by using optical interference patterns, e.g. holograms
2.
HOLOGRAM REPRODUCTION DEVICE AND HOLOGRAM REPRODUCTION METHOD
Provided are a hologram reproduction device and reproduction system capable of improving the reliability and improving the speed of hologram reproduction. Provided is a hologram reproduction device that changes irradiates, with a reference light, a recording medium in which the incident angle of the reference light is changed to a first direction and a hologram has been angle-multiplexing recorded, and reproduces the recorded hologram by receiving, with an imaging element, generated diffracted light as reproduction light, the hologram reproduction device being characterized by being provided with: a reference light angle adjustment unit that adjusts a medium incident angle at which the reference light enters the recording medium; an aperture filter having an aperture which the reproduction light from the recording medium enters and through which the reproduction light is transmitted; a light detection unit that detects light emitted from the aperture filter and outputs a signal on the basis of the detected light; and a positional deviation detection unit that, on the basis of the signal outputted by the light detection unit, detects an amount of relative positional deviation of the recording position of a hologram to be reproduced and the irradiation position on the recording medium of the reference light for reproducing the hologram to be reproduced. The reference light angle adjustment unit adjusts a medium incident angle of the reference light in a second direction which is perpendicular to the first direction on the basis of the positional deviation amount detected by the positional deviation detection unit.
In a library device, data is divided into a plurality of pages, and recorded as books where the plurality of pages is multiplexed for each prescribed recording area on an optical disc by an optical drive, the books being arrayed on the optical disc. A library control unit causes the optical drive to irradiate a region on the optical disc including a plurality of books arrayed on the optical disc with inspection light in order to inspect the data in one recording area, and evaluates the quality of a signal by reproducing only one book from the plurality of books irradiated with the inspection light. The inspection is then carried out by moving the irradiation position of the inspection light by a distance corresponding to the plurality of books arrayed on the optical disc to thus inspect the next recording area, whereby the data recorded in the whole area is inspected with the number of irradiation positions at which the inspection light impinges on the optical disc being less than the number of the books recorded on the optical disc.
G11B 7/004 - Recording, reproducing or erasing methods; Read, write or erase circuits therefor
G11B 7/0065 - Recording, reproducing or erasing by using optical interference patterns, e.g. holograms
G11B 17/20 - Guiding record carriers not specifically of filamentary or web form, or of supports therefor from consecutive-access magazine of disc records with transfer away from stack on turntable after playing
4.
OPTICAL INFORMATION RECORDING AND REPRODUCING APPARATUS, OPTICAL INFORMATION RECORDING APPARATUS, AND OPTICAL INFORMATION RECORDING AND REPRODUCING METHOD
Provided are: an optical information recording and reproducing apparatus that utilizes holography and that can perform reproduction with fine quality even when recording is performed at high recording density; and a method therefor. This optical information recording and reproducing apparatus for recording and reproducing, as a hologram, a pattern of interference between reference light and signal light on/from optical information recording medium by utilizing holography is characterized by being provided with: a light source that emits laser light; an optical element that separates the laser light into reference light and signal light; a phase control unit that controls the phase of the signal light or the reference light during recording; and a photodetector that detects signal light reproduced through irradiation of the optical information recording medium with the reference light, wherein when reproduction light reproduced from a first hologram when irradiation with the reference light is performed is defined as first reproduction light and reproduction light reproduced from a second hologram recorded on a page adjacent to a page on which the first hologram is recorded is defined as second reproduction light, the phase control unit controls the phase of the reference light or the signal light during recording such that the phase difference between the first reproduction light and the second reproduction light is at a predetermined value.
A hologram record-playback device, wherein the diffusion effect of a phase diffusion element is improved while ensuring signal quality, so that high-recording-density recording can be performed. A first phase diffusion filter, which is driven during recording, is disposed between a branching element and a spatial light modulator, and a second phase diffusion filter, which is not driven during recording, is disposed between a spatial filter and a hologram recording medium.
Provided are an optical information reproduction device that uses holography and a method therefor allowing the effect of reference light reflected from a disc surface to be reduced, and allowing the data to be stably reproduced. The optical information reproduction device reproduces information from a holographic optical information recording medium that performs multiple recordings of page data for each angle of the reference light, the optical information reproduction device comprising: a light source for generating the reference light; a multiple angle adjustment unit for adjusting the angles in multiple directions of the reference light; and an imaging element for detecting the reproduction light reproduced from the holographic optical information recording medium using the reference light. The device detects the spot position of the reflection light detected when irradiating the holographic optical information recording medium with the reference light, and carries out erasure correction using an error correcting code added to the page data with the spot position as the erasure position.
G11B 7/0065 - Recording, reproducing or erasing by using optical interference patterns, e.g. holograms
G11B 7/135 - Means for guiding the beam from the source to the record carrier or from the record carrier to the detector
G11B 20/18 - Error detection or correction; Testing
7.
HOLOGRAM RECORDING METHOD, HOLOGRAM PLAYBACK METHOD, HOLOGRAM MEDIUM, HOLOGRAM RECORDING AND PLAYBACK DEVICE, AND HOLOGRAM RECORDING AND PLAYBACK SYSTEM
A hologram recording and playback device in which there is a restriction on the number of times a replacement process can be performed in order to record data in high densities, wherein in view of the fact that a failure to perform rewriting in a spare region at sufficient signal quality may result in a recording error, the incidence of recording error when data is recorded at high density on a hologram medium due to a recording command from a higher-order element is effectively inhibited. User data for which a replacement process is performed is recorded in the spare region at a lower recording density than that of a user data region.
The purpose of the present invention is to provide an optical information recording device and an optical information recording method that ensure performance and speed up calculation processing time, and that generate 2D data. In the present invention, an error-correction block, which was generated by error-correction encoding of user data, is divided into b (b: natural number) sectors in which the number of bits included in one sector is a-bits (a: natural number). The sectors are divided into c (c: natural number) to form sub-sectors. Bits are allotted to each of the c sub-sectors and the order of bits is randomized for each of the sub-sectors to which bits were allotted. An interleaved sector is generated by combining c of the sub-sectors for which the order of bits was randomized. The interleaved sector is divided into c/d (d: natural number; c≠d, c>d), and e (e: natural number; e≠b, b>e) of the divided interleaved sectors are combined to form a pre-modulation block. A modulation column is generated by modulating an array in the pre-modulation block using a modulation rule so that the lower limit value of a continuous number of ON or OFF pixels disposed in a row direction becomes f (f: natural number). A modulation column is provided in a data unit of a sub-page generated by dividing prescribed page data into g (g: natural number). By providing a synchronization signal in a marker unit, 2D data is generated. The marker unit is formed by a fixed pattern indicating the synchronization signal and an adjacent-code copy pattern of the modulation column.
The present invention employs a suitable filter shape for equalization when reproducing a high-density recorded hologram to thereby minimize the scale of the circuit without degrading the performance of the equalization. An optical information recording and reproducing device records an interference fringe composed of reference light and signal light as a hologram in an optical information recording medium, and reproduces information from the optical information recording medium. The optical information recording and reproducing device comprises: a light source for emitting light; an optical system for signal light and reference light that generates signal light and reference light from the light and irradiates the optical information recording medium with the signal light and the reference light; a spatial light modulator that adds information to the signal light generated; a photodetector that detects the light reproduced from the optical information recording medium to thereby acquire a reproduced image composed of a plurality of pixels arranged in a lattice structure; and a signal processing unit that equalizes first pixels of the reproduced image to the target characteristics using pixels surrounding the first pixels for equalizing the first pixels, and a filter with a filter shape matching the pixel array shape of the first pixels on the basis of the arrangement pattern of the on-pixels and off-pixels in the spatial light modulator. The number of coefficients in a first direction of the filter shape differs from the number of coefficients in a second direction orthogonal to the first direction.
A photosensitive holographic medium, on being irradiated with light for reproduction, converts an unreacted monomer therein into a photopolymerizable monomer. Therefore, the recording quality of a holographic medium may deteriorate when the address for a management information storage area not yet determined as a recorded area is accessed to acquire the latest management information. The purpose of the present invention is to efficiently determine a recorded area without accessing an unrecorded area in a holographic medium. To solve the above problem, a method for determining the volume of information recorded onto an information recording medium by an optical information recording and reproducing device for recording and reproducing information comprises: a step of generating recording determination information by combining user data with additional information; a step of recording the recording determination information on the information recording medium; a step of reproducing the recording determination information recorded on the information recording medium; and a step of determining whether or not the recording determination information has been preliminarily recorded on the basis of the additional information of the recording determination information reproduced.
The purpose of the present invention is to provide a hologram recording and reproduction device capable of carrying out stable recording and reproduction, or reproduction by correcting the angular displacement, the inclination of an optical axis associated with a positional displacement, and a positional displacement of an optical component in the optical system in the hologram recording and reproduction device. For this purpose, a two-beam angle multiplexing hologram recording and reproduction device comprises: a light source unit for emitting an optical beam; a divergence unit for diverging the optical beam emitted from the light source into signal light and reference light; a first lens for irradiating an optical information recording medium with the signal light; a second lens for causing the reference light to be incident onto substantially the same position as the position onto which the signal light is incident in the optical information recording medium; a light path angle changing unit for changing the incident angle of the reference light incident on the optical information recording medium; and an optical component in the light path from the light source to the first lens or the second lens. The hologram recording and reproduction device also comprises an optical axis changing unit for changing the inclination or the position of the incident light on the optical component.
G11B 7/09 - Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam or focus plane for the purpose of maintaining alignment of the light beam relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track f
G03H 1/04 - Processes or apparatus for producing holograms
G03H 1/22 - Processes or apparatus for obtaining an optical image from holograms
G03H 1/26 - Processes or apparatus specially adapted to produce multiple holograms or to obtain images from them, e.g. multicolour technique
G11B 7/0065 - Recording, reproducing or erasing by using optical interference patterns, e.g. holograms
G11B 7/135 - Means for guiding the beam from the source to the record carrier or from the record carrier to the detector
12.
OPTICAL INFORMATION RECORDING DEVICE AND METHOD FOR RECORDING OPTICAL INFORMATION
The purpose of the present invention is to provide a suitable optical information recording device and a method for recording optical information by performing sufficient pre-curing to improve the recording quality of a hologram and shortening the time needed for post-curing in order to achieve high-speed transfer and recording. The optical information recording device for recording information onto an optical information recording medium using holography comprises: a cure light source unit for emitting pre-cure light or post-cure light with mutually different wavelengths; and a control unit for controlling so as to irradiate the optical information recording medium with the pre-cure light or the post-cure light depending on whether the irradiation is before or after the recording. A method for recording optical information utilizes this optical information recording device.
The purpose of the present invention is to provide an optical information device and a method for processing optical information that allow for high-speed and accurate positioning. An example of the solution is to provide an optical information device for reproducing information from and/or recording information onto an optical information recording medium wherein an interference pattern between signal light and reference light is multiplexed onto a holographic page, the optical information device comprising: an optical system for emitting a light beam; an opening for allowing at least a portion of the light reproduced when the optical information recording medium is irradiated with the light beam from the optical system to pass therethrough; a first detector for detecting at least a portion of the light reproduced; a first signal generator for generating a first position signal representing a positional error of the opening in the optical axis direction using a signal detected by the first detector; and a first controller for controlling the displacement of the position of the opening in the optical axis direction. The first controller controls the position of the opening on the basis of a signal obtained by adding an offset quantity to or subtracting the offset quantity from the first position signal.
A hologram recording and reproducing device and an angular multiplexing recording and reproducing method capable of detecting an angular error signal for which, in a two-beam angle multiplexing method, high-speed reproducing can be achieved with a superior recovered signal. A branch element branches a light beam, emitted from a light source, into a signal light and a reference light. Angle-variable elements modify the incident angle of the reference light that is incident to the optical information recording medium. A spatial light modulator adds information to the signal light; and an objective lens radiates the signal light to the optical information recording medium. An imaging element detects diffracted light generated from a recording region when the reference light is radiated upon the optical information recording medium; a detection system detects at least two angular error signals for controlling the angle-variable elements; and switching is performed between the two angular error signals.
G11B 7/0065 - Recording, reproducing or erasing by using optical interference patterns, e.g. holograms
G11B 7/09 - Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam or focus plane for the purpose of maintaining alignment of the light beam relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track f
G03H 1/26 - Processes or apparatus specially adapted to produce multiple holograms or to obtain images from them, e.g. multicolour technique
G11B 7/085 - Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam into, or out of, its operative position.
G11B 7/1356 - Double or multiple prisms, i.e. having two or more prisms in cooperation
G11B 7/1353 - Diffractive elements, e.g. holograms or gratings
G11B 20/18 - Error detection or correction; Testing
G11B 7/0037 - Recording, reproducing or erasing systems characterised by the shape of the carrier with discs
G03H 1/04 - Processes or apparatus for producing holograms
G03H 1/22 - Processes or apparatus for obtaining an optical image from holograms
15.
Hologram recording and playback device and hologram playback method
A hologram recording and playback device is provided with: a medium rotation unit which rotates a hologram recording medium around a predetermined rotational axis; a movement unit which is capable of moving the position of the medium rotation unit within a plane that is perpendicular to the rotational axis; an orthogonal incident angle modification unit which is capable of modifying an orthogonal incident angle; a medium rotation control unit which controls the medium rotation unit so as to rotate the hologram recording medium; an eccentricity compensation unit which performs positioning control of the movement unit; an orthogonal incident angle control unit which controls the orthogonal incident angle modification unit; and an orthogonal incident angle calculation unit which calculates the orthogonal incident angle.
G11B 7/0065 - Recording, reproducing or erasing by using optical interference patterns, e.g. holograms
G11B 7/08 - Disposition or mounting of heads or light sources relatively to record carriers
G03H 1/22 - Processes or apparatus for obtaining an optical image from holograms
G11B 7/085 - Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam into, or out of, its operative position.
G11B 19/20 - Driving; Starting; Stopping; Control thereof
G11B 7/0037 - Recording, reproducing or erasing systems characterised by the shape of the carrier with discs
G11B 7/00 - Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation, reproducing using an optical beam at lower power; Record carriers therefor
G03H 1/26 - Processes or apparatus specially adapted to produce multiple holograms or to obtain images from them, e.g. multicolour technique
G11B 7/095 - Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam or focus plane for the purpose of maintaining alignment of the light beam relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track f specially adapted for discs, e.g. for compensation of eccentricity or wobble
G03H 1/12 - Spatial modulation, e.g. ghost imaging
16.
OPTICAL-INFORMATION RECORDING AND REPRODUCING METHOD AND OPTICAL-INFORMATION RECORDING AND REPRODUCING DEVICE
Provided is a holographic optical-information recording and reproducing device and optical-information recording and reproducing method capable of increasing recording capacity with a simple configuration. An example of the solution is an optical-information recording and reproducing method characterized by including: a first recording step for forming a first hologram at a predetermined position in an optical-information recording medium using the interference between a first signal beam and a first reference beam; and a second recording step for forming a second hologram adjacent to the first hologram using the interference between a second signal beam and a second reference beam. The method is also characterized in that, in the first recording step or the second recording step, the first beam waist of the first signal beam in the first hologram and the second beam waist of the second signal beam in the second hologram are made to overlap each other by a predetermined amount in a beam-waist plane in the optical-information recording medium, and the incident angle of the first reference beam when forming the first hologram and the incident angle of the second reference beam when forming the second hologram are made to deviate from each other by a predetermined amount.
G11B 7/0065 - Recording, reproducing or erasing by using optical interference patterns, e.g. holograms
G03H 1/04 - Processes or apparatus for producing holograms
G03H 1/30 - Processes or apparatus specially adapted to produce multiple holograms or to obtain images from them, e.g. multicolour technique discrete holograms only
G11B 7/135 - Means for guiding the beam from the source to the record carrier or from the record carrier to the detector
17.
RECORDING/RECONSTRUCTION METHOD AND RECORDING/RECONSTRUCTION DEVICE
The present invention addresses the problem of providing a recording/reconstruction method that ensures compatibility between different devices in terms of recording and reconstruction of data to and from a hologram disk, and a recording/reconstruction device. The recording/reconstruction device, which utilizes a hologram to record information to or reconstruct information from a recording medium in response to a recording request from outside, is equipped with: a recording/reconstruction unit for recording information to the recording medium or reconstructing information therefrom; and a system control unit for controlling running of the recording/reconstruction unit. The system control unit divides a recording area of the recording medium into multiple zones and generates, in at least one of the divided zones, a management data area for recording management data including address information pertaining to user data recording positions, and the recording/reconstruction unit records the management data to the management data area when recording the user data into the respective divided zones.
The purpose of the present invention is to provide a device and a method for enabling the phase of a playback signal to be quickly calculated during the playback of phase-based recorded information. The device is an optical information playback device is for performing playback of information which has been modulated using the phase of light and is equipped with: a playback light optical system which generates playback light for information playback; an oscillator light optical system which generates oscillator light for interference with the playback light; a phase changer which changes the phase of the playback light or oscillator light; a photodetector which detects the intensity of the playback light and/or the oscillator light; an interference optical system which causes the playback light and the oscillator light to interfere with each other over the photodetector; and a signal processing circuit which calculates the phase of the playback light on the basis of the detection result of the photodetector.
The purpose of the present invention is to provide a signal quality evaluation device having a high correlation with a post-decoding error rate, a signal quality evaluation method, and an information recording medium. This can be achieved by means of, for example, a signal quality evaluation device for evaluating a playback signal from an information recording medium, the signal quality evaluation device being equipped with: a logical value determination part which determines, from a two-dimensional playback signal which includes information corresponding to a first logical value and a second logical value, a first playback signal corresponding to the first logical value and a second playback signal corresponding to the second logical value; a first reference value calculation part which generates a first reference value; a second reference value calculation part which generates a second reference value; a first determination part which determines a playback signal having a greater intensity than the first reference value from the first playback signal; a second determination part which determines a playback signal having a greater intensity than the second reference value from the second playback signal; and an evaluation value calculation part which calculates a quality evaluation value on the basis of an output of the first determination part and an output of the second determination part. The average value of the signal intensity of the first playback signal is smaller than the average value of the signal intensity of the second playback signal.
Provided is a recording method with which wasteful consumption of the M number (M/#) of the recording material is prevented, and with which the recording density is improved. An optical information recording device that utilizes interference between signal light and reference light to record information on an optical information recording medium is equipped with: a light source that emits light toward an optical recording medium; a beam-splitting element that splits the emission light emitted from the light source into signal light and reference light; and a reference light angle control unit that controls the incidence angle of the reference light with respect to the optical information recording medium. The optical recording medium is irradiated with the signal light as a spherical wave and is irradiated with the reference light as a planar wave, and when information is recorded on the optical information recording medium, the optical information recording medium is irradiated such that there exists in the interior of the optical information recording medium a region which is exposed only to the signal light, a region which is exposed only to the reference light, and a region which is exposed to overlapping signal light and reference light.
d that are different from the image pickup element and detect reproduction light applied on a location on the periphery of the aperture 101, and a computing unit which computes a position error signal based on outputs from the photo detectors.
G11B 7/0065 - Recording, reproducing or erasing by using optical interference patterns, e.g. holograms
G11B 7/1381 - Non-lens elements for altering the properties of the beam, e.g. knife edges, slits, filters or stops
G11B 7/09 - Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam or focus plane for the purpose of maintaining alignment of the light beam relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track f
G11B 7/08 - Disposition or mounting of heads or light sources relatively to record carriers
G11B 7/00 - Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation, reproducing using an optical beam at lower power; Record carriers therefor
G03H 1/26 - Processes or apparatus specially adapted to produce multiple holograms or to obtain images from them, e.g. multicolour technique
G03H 1/22 - Processes or apparatus for obtaining an optical image from holograms
G11B 7/085 - Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam into, or out of, its operative position.
22.
Optical information recording and reproducing device, optical information recording and reproducing method
An optical information recording and reproducing device that records information on a recording medium and/or reproduces information on the recording medium, using holography is configured to include a laser light source that performs irradiation with laser light, a first light-shielding portion which is capable of switching between transmission and shielding of laser light emitted from the laser light source, and a driving circuit that drives the switching between transmission and shielding of the first light-shielding portion, and a first movement portion that moves the first light-shielding portion.
This data recording method for recording data in multiple regions on a medium is characterized by involving a step for configuring a data region (301) on the medium depending on the amount of data to be recorded, a step for recording the data in the data region, a step for verification processing of the data in the data recorded region (301) where the data has been recorded and for detecting defective data, a step for configuring an alternate region (311) on the medium depending on the amount of alternate data corresponding the defective data detected, and a step for recording the alternate data in the alternate region, wherein the alternate region (311) is configured to be adjacent to the data recorded region (301). Here, the medium (2) is a circular medium, the alternate region (311) is an approximately fan-shape portion configured on the circular medium, and the size of the approximately fan-shaped portion is determined depending on the amount of the alternate data.
Provided is a light information device, and the like, that records header information on an information recording medium, after preventing screen burn of a spatial light modulator. One example of the solution in the present invention is a light information device that records two-dimensional page data on an information recording medium and is provided with a first information generation unit, a second information generation unit that generates a second bit string on the basis of a first bit string, and a spatial light modulation unit that displays a pattern corresponding to the second bit string. The second information generation unit: performs a first processing, on the first bit string corresponding to first identification information, that inverts each bit at a prescribed cycle; generates the second bit string corresponding to the first identification information; performs a second processing, different from the first processing, on the first bit string corresponding to second identification information that includes bits which are switched at the same cycle as the prescribed cycle; and generates the second bit string corresponding to the second identification information.
The purpose of the invention is to provide a data recording and playback device which records and plays back digital information using holography and a data recording method, such that reduction of recording capacity caused by post-curing is prevented. Provided is an information recording and playback device which records information by irradiating a recording medium with signal light and reference light so as to create a hologram, and plays back that information, said information recording and playback device being provided with: a laser source which emits laser light; an optical pickup which irradiates the recording medium with the signal light and the reference light so as to record information; a curing optical part which, after the information has been recorded in the recording medium, performs a post-curing process for irradiating the recorded region in which information has been recorded with laser light. The post-curing process region on which the curing optical part has applied the post-curing process is contained in the recorded region, and is of a smaller range than the recorded region.
Appropriate recording with respect to a hologram recording medium is to be realized. After a region recording process of arranging holograms in which information is recorded at a predetermined interval in a first predetermined region of the hologram recording medium, and before a post-curing with respect to the first predetermined region is performed, signal light and reference light are applied onto a region different from the first predetermined region to perform information recording.
G11B 7/0065 - Recording, reproducing or erasing by using optical interference patterns, e.g. holograms
G03H 1/18 - Particular processing of hologram record carriers, e.g. for obtaining blazed holograms
G11B 20/12 - Formatting, e.g. arrangement of data block or words on the record carriers
G11B 7/00 - Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation, reproducing using an optical beam at lower power; Record carriers therefor
27.
OPTICAL INFORMATION DEVICE AND OPTICAL INFORMATION PROCESSING METHOD
The purpose of the present invention is to provide an optical information device and an optical information processing method which can perform high-speed and accurate positioning. One example of a solution is an optical information device which reproduces information from an optical information recording medium on which interference patterns between signal light and reference light are recorded as a hologram, and/or records information on an optical information recording medium, said optical information device being provided with: an optical system which emits an optical beam; an aperture unit which passes at least a portion of reproduced light acquired when the optical beam from the optical system is radiated onto the optical information recording medium; a first detection unit which detects at least a portion of the reproduced light; a second detection unit which detects the position of the aperture unit; and a control unit which, on the basis of a first signal acquired from the first detection unit and a second signal acquired from the second detection unit, controls the position of the aperture unit.
G11B 7/0065 - Recording, reproducing or erasing by using optical interference patterns, e.g. holograms
G03H 1/04 - Processes or apparatus for producing holograms
G03H 1/22 - Processes or apparatus for obtaining an optical image from holograms
G11B 7/135 - Means for guiding the beam from the source to the record carrier or from the record carrier to the detector
28.
MARKER PATTERN GENERATION METHOD, INFORMATION RECORDING MEDIUM, INFORMATION RECONSTRUCTION METHOD, AND INFORMATION RECORDING MEDIUM RECONSTRUCTION DEVICE
The present invention addresses the problem of providing, in reconstruction processing for holographic memory, marker patterns for which sub-pixel position detection is possible even in a data page for which the amount of inter-pixel interference is significant. As an example of means which resolves the problem, a marker pattern generation method is provided with an intermediate pattern generation step and a magnification pattern generation step, wherein: in the intermediate pattern generation step, an intermediate pattern is generated so that, for the intermediate pattern, the covariance value is 0 between the intermediate pattern central portion, which excludes an outer edge comprising pixels adjacent to the boundary of the same, and a partial region, which is inscribed in the boundary of the intermediate pattern; and in the magnification pattern generation step, each recording pixel of the intermediate pattern is substituted with a recording unit in which a plurality of recording pixels of the same polarity as the first-mentioned recording pixel are arrayed in the row-direction and/or the column-direction.
The present invention addresses the problem of providing an interleaving method suitable for a recording format that includes sub-pages for which the portion that is effective data (which includes user data and the like) is smaller than that of other sub-page regions. One example of a means for solving this problem is an optical information recording device that uses holography to record information on an information recording medium, said information recording device being equipped with a signal generation unit that generates two-dimensional data, and a two-dimensional optical modulation unit that displays the two-dimensional data and spatially modulates transmitted or reflected light. The signal generation unit appends an error correction code to data to form p bits of sector data (where p is a natural number), and forms page data by means of q sectors (where q is a natural number). The signal generation unit divides the region to be displayed by the two-dimensional optical modulation unit into r sub-pages (where r is a natural number) so as to include sub-pages for which the portion that is effective data is smaller than that of other sub-page regions, and generates two-dimensional data such that the effective data allocated to each sub-page is an integer multiple of the number of sectors.
Provided are a highly reliable recording/reproduction device and recording/reproduction method with which the light axes for signal light and reference light can be detected as needed and adjusted to compensate for light axis deviation, thereby reducing the influence of changes over time and enabling stable, high-quality hologram recording. The recording/reproduction device, which records information by irradiating a recording medium with signal light and reference light to form a hologram, and reproduces the information by irradiating the hologram with the reference light, is equipped with: a laser light source that emits laser light; a branching element that branches the laser light from the laser light source into signal light and reference light; a spatial light modulation unit for adding two-dimensional information to the signal light; a first mirror, the angle of which can be varied, and which reflects the signal light to which information has been added by the spatial light modulation unit; an objective lens for irradiating the recording medium with the signal light reflected by the first mirror; a second mirror, the angle of which can be varied, and which reflects the reference light branched from the branching element; a scanner lens for irradiating the recording medium with the reference light reflected by the second mirror; a position adjustment unit that adjusts the relative positions of the objective lens and the scanner lens; and a control unit that controls the operation of the first mirror, the second mirror, and the position adjustment unit.
Provided are an optical information reproduction device and a method therefor with which the influence of reference light reflected from the surface of a disk can be reduced, thereby enabling data to be reproduced in a stable manner in an optical information reproduction device that uses holography. The information reproduction device, which reproduces from a recording medium information that has been recorded on the recording medium by the formation of a hologram, is equipped with: a light output unit that emits laser light; an optical system that generates reference light from the laser light emitted from the light output unit; an objective lens that reproduction signal light reproduced by the reference light with which the recording medium has been irradiated enters; a light detector that receives the reproduction signal light propagated by the objective lens; a medium-reflected light reduction unit that reduces the amount of medium-reflected light (generated when the recording medium reflects the reference light) with which the light detector is irradiated; and a control unit that controls the operation of the information reproduction device.
An objective of the present invention is to provide a hologram reconstruction device and hologram reconstruction method capable of appropriately reconstructing information recorded in a hologram recording medium. The hologram reconstruction device reconstructs information which is recorded in a hologram recording medium, and the hologram reconstruction method is used with the hologram reconstruction device. The hologram reconstruction device comprises: a light source which emits a reference light; an entry angle change unit which is capable of changing the entry angle of the reference light which enters the hologram recording medium; an angle error signal generating unit which generates an angle error signal; a target angle setting unit which sets a target angle of the entry angle of the reference light; and an entry angle control unit which controls the entry angle change unit, using as a control target the target angle set by the target angle setting unit. The target angle setting unit changes the target angle on the basis of the angle error signal in a period wherein the entry angle control unit controls the entry angle change unit to change the entry angle of the reference light.
G11B 7/0065 - Recording, reproducing or erasing by using optical interference patterns, e.g. holograms
G03H 1/26 - Processes or apparatus specially adapted to produce multiple holograms or to obtain images from them, e.g. multicolour technique
G11B 7/09 - Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam or focus plane for the purpose of maintaining alignment of the light beam relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track f
33.
HOLOGRAM REPRODUCING APPARATUS AND HOLOGRAM REPRODUCING METHOD
The purpose of the present invention is to provide a hologram reproducing apparatus and a hologram reproducing method, which are suitable for reproducing hologram. The purpose can be achieved by means of a hologram reproducing apparatus, which reproduces information signals by irradiating an optical information recording medium with reference light, and a hologram reproducing method for the hologram reproducing apparatus. The hologram reproducing apparatus is characterized in being provided with: a polarization conversion section, which converts polarization of diffracted light that is generated when the optical information recording medium is irradiated with the reference light; a light receiving section, which receives the diffracted light having the polarization thereof converted by means of the polarization conversion section; and a servo signal generating circuit section, which generates signals for moving the optical information recording medium or the polarization conversion section using the diffracted light received by means of the light receiving section.
G11B 7/0065 - Recording, reproducing or erasing by using optical interference patterns, e.g. holograms
G03H 1/26 - Processes or apparatus specially adapted to produce multiple holograms or to obtain images from them, e.g. multicolour technique
G11B 7/135 - Means for guiding the beam from the source to the record carrier or from the record carrier to the detector
34.
OPTICAL INFORMATION RECORDING DEVICE, OPTICAL INFORMATION REPRODUCTION DEVICE, OPTICAL INFORMATION RECORDING METHOD, AND OPTICAL INFORMATION REPRODUCTION METHOD
When a short stack is used there is a problem in that it is difficult to increase the recording transmission speed and the reproduction transmission speed. This problem is solved by means of this optical information recording device, which records an interference pattern of a signal light and a reference light as a hologram on an optical information recording medium, and is equipped with: a light source unit that emits light; a branching element that branches the light emitted from the light source unit into a signal light and a reference light; a spatial light modulator for adding two-dimensional information to the signal light; and a signal light angle-changing element capable of changing the angle of the signal light. When recording is performed the signal light angle-changing element changes the angle of the signal light, thereby changing the position of the signal light on the optical information recording medium.
G11B 7/0065 - Recording, reproducing or erasing by using optical interference patterns, e.g. holograms
G03H 1/28 - Processes or apparatus specially adapted to produce multiple holograms or to obtain images from them, e.g. multicolour technique superimposed holograms only
G11B 7/135 - Means for guiding the beam from the source to the record carrier or from the record carrier to the detector
35.
Channel bitword processor, PRML decoder, and optical information recording/reproducing device
It is an objective of the present invention to provide a technique, when using fixed-length run-length limit codes based on enumeration, that generates fixed-length channel bit words satisfying maximum run-length limitation using a simple configuration. A channel bit word processor according to the present invention includes an avoidance list that describes a difference between a user bit word satisfying a maximum run-length limitation of run-length limit code and a user bit word not satisfying the maximum run-length limitation. The channel bit word processor, if a user bit word does not satisfy the maximum run-length limitation, generates a channel bit word using a user bit word after the difference is added.
G11B 20/00 - Signal processing not specific to the method of recording or reproducing; Circuits therefor
G11B 20/14 - Digital recording or reproducing using self-clocking codes
H03M 7/46 - Conversion to or from run-length codes, i.e. by representing the number of consecutive digits, or groups of digits, of the same kind by a code word and a digit indicative of that kind
G11B 20/18 - Error detection or correction; Testing
H03M 13/00 - Coding, decoding or code conversion, for error detection or error correction; Coding theory basic assumptions; Coding bounds; Error probability evaluation methods; Channel models; Simulation or testing of codes
36.
OPTICAL INFORMATION RECORDING MEDIUM, OPTICAL INFORMATION RECORDING METHOD AND OPTICAL INFORMATION PLAYBACK METHOD
The objective of the present invention is, in playback processing for holographic memory, to easily and accurately perform processing which verifies that detected page data are a page that includes predefined target data, and processing which identifies a data format, which are performed prior to determination of user data. A page header, which stores identification information of page data or information for identifying a data format, is provided within patterns of the page data. In the page header, along a data pattern forming a one-dimensional pattern, a clock pattern in which on-pixels and off-pixels are repeated at a constant period is placed.
G11B 7/0065 - Recording, reproducing or erasing by using optical interference patterns, e.g. holograms
G03H 1/04 - Processes or apparatus for producing holograms
G11B 7/007 - Arrangement of the information on the record carrier, e.g. form of tracks
37.
OPTICAL INFORMATION RECORDING DEVICE, OPTICAL INFORMATION PLAYBACK DEVICE, OPTICAL INFORMATION RECORDING METHOD AND PLAYBACK POSITION MISALIGNMENT DETECTION METHOD
When densely recording books upon a recording medium in order to perform high-density recording of a hologram upon the recording medium, it is necessary to precisely position the books at reference light irradiation positions at playback time. In the present invention, an optical information recording device, which records information on an optical information recording medium using holography, is provided with a light source which fires a light beam, a light beam separation unit which separates the light beam into reference light and signal light, and a spatial light modulation unit which superimposes page data upon the signal light. The spatial light modulation unit places a first modulation pattern on first page data recorded at a first area upon the optical information recording medium. The spatial light modulation unit places a second modulation pattern, which includes a modulation pattern in which bit polarity has been reversed with respect to the first modulation pattern, at a predetermined portion of second page data recorded at a second area adjacent to the first area.
G11B 7/0065 - Recording, reproducing or erasing by using optical interference patterns, e.g. holograms
G03H 1/22 - Processes or apparatus for obtaining an optical image from holograms
G11B 7/085 - Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam into, or out of, its operative position.
G11B 7/135 - Means for guiding the beam from the source to the record carrier or from the record carrier to the detector
38.
Optical information recording/reproduction device, and optical information recording/reproduction method
Provided are an optical information recording/reproduction device and an optical information recording/reproduction method with which retry data during verify error detection can be efficiently recorded. In the optical information recording/reproduction device for recording data on an optical information recording media and reproducing data from an optical information recording medium, if verify error data is detected at a first cure unit region on the optical information recording medium, verify error retry data is recorded at a second cure unit region which is different to the first cure unit region.
G11B 19/04 - Arrangements for preventing, inhibiting, or warning against, double recording on the same blank, or against other recording or reproducing malfunctions
G11B 7/00 - Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation, reproducing using an optical beam at lower power; Record carriers therefor
G11C 13/04 - Digital stores characterised by the use of storage elements not covered by groups , , or using optical elements
39.
OPTICAL INFORMATION RECORDING/REPRODUCTION DEVICE AND ADJUSTMENT METHOD
When a position displacement or an angle displacement of a component occurs during recording or reproduction, problems are presented in that the beam diameter of reference light changes, there is an increase in excess exposure not contributing to recording on an optical information recording medium, appropriate recording cannot be accomplished without interference between reference light and signal light, and degradation occurs in the SNR of a holographically reproduced image. The present invention provides an optical information recording/reproduction device for recording information by irradiating an optical information recording medium with signal light and reference light to form a hologram, and reproducing the information by irradiating the hologram with the reference light, wherein the optical information recording/reproduction device is provided with a branching element for branching laser light from a laser light source into signal light and reference light, a spatial light modulation unit for adding two-dimensional information to the signal light, an objective lens for irradiating an optical information recording medium with the signal light, a light detection unit for detecting diffracted light from the optical information recording medium when irradiated with the reference light, and an optical axis adjustment unit disposed between the laser light source and the branching element, the optical axis adjustment unit adjusting the optical axis of the laser light.
The present invention provides an optical information reproduction device for detecting an interference-type optical information signal, the optical information reproduction device allowing the optical path difference between two rays of light to be easily adjusted and a high signal amplification effect to be produced. A beam emitted from a light source is divided into signal light and into reference light not concentrated on an optical information recording medium, and optical interference is created in a state of mutually different phase relations between the signal light and the reference light. In one example, the reference light is defocused forward and backward relative to the signal light to obtain detected signals Sig1 and Sig2, and a focus error signal is obtained from the difference between the two signals. At this time, the imbalance between Sig1 and Sig2 is corrected by multiplying the two signals by a coefficient and subtracting one signal from the other.
G11B 7/09 - Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam or focus plane for the purpose of maintaining alignment of the light beam relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track f
The objective of the present invention is to achieve suitable recording and playback for a hologram recording medium. An hologram recording and playback device is provided with: a medium rotation unit which rotates a hologram recording medium around a predetermined rotational axis; a movement unit which is capable of moving the position of the medium rotation unit within a plane that is perpendicular to the rotational axis; an orthogonal incident angle modification unit which is capable of modifying an orthogonal incident angle, at which reference light incident to the hologram recording medium impinges therefrom, to a direction that is orthogonal to an incident surface that includes the optical axis of the signal light and the normal line of the hologram recording medium; a medium rotation control unit which controls the medium rotation unit so as to rotate the hologram recording medium; an eccentricity compensation unit which performs positioning control of the movement unit; an orthogonal incident angle control unit which controls the orthogonal incident angle modification unit; and an orthogonal incident angle calculation unit which calculates the orthogonal incident angle. When the medium rotation control unit controls the medium rotation unit so as to cause rotation of the hologram recording medium, the orthogonal incident angle control unit controls, subsequent to performing positioning control of the movement unit by the eccentricity compensation unit, the orthogonal incident angle modification unit so as to modify the orthogonal incident angle of the reference light on the basis of the calculation result of the orthogonal incident angle calculation unit.
G11B 7/095 - Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam or focus plane for the purpose of maintaining alignment of the light beam relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track f specially adapted for discs, e.g. for compensation of eccentricity or wobble
G03H 1/26 - Processes or apparatus specially adapted to produce multiple holograms or to obtain images from them, e.g. multicolour technique
G11B 7/0065 - Recording, reproducing or erasing by using optical interference patterns, e.g. holograms
G11B 7/135 - Means for guiding the beam from the source to the record carrier or from the record carrier to the detector
42.
DATA RECORDING DEVICE, DATA PLAYBACK DEVICE, DATA RECORDING/PLAYBACK DEVICE, AND DATA RECORDING/PLAYBACK METHOD
Provided are a data recording/playback device and a data recording/playback method, for providing a method for readily reading medium discrimination and management data, in a data recording/playback device that records and plays back digital information by using holography. The data recording/playback device has two-dimensional data as the minimum recording unit therefor, multiplex-records data to a medium volumetrically, records and replays same, and comprises: a page data generation unit that generates page data such that the two-dimensional data minimum recording unit used when data recording indicates one bit's worth of information; and a page data processing unit that finds a data diffraction light amount recorded by a diffraction light amount detection unit, used when replaying data, converts same to binary data on the basis of a threshold level by using a data restoration unit, and determines medium information by using a medium determination unit.
The objective of the present invention is, using an optical system which performs adjustment, to allow a reference beam optical system to be adjustable with high accuracy. The present invention is an optical information playback device which plays back information that has been recorded using angle-multiplexing holography on an optical information recording medium, said optical information playback device being provided with: a light source for generating a reference light; a first actuator which varies the angle of the reference light that is incident to the optical information recording medium; phase conjugate generation means configured by combining a condenser lens which generates phase-conjugated beams of light that has been transmitted through the optical information recording medium, and a movable mirror; a second actuator which drives the movable mirror; and a reference light measurement unit which measures divergence and convergence of the reference light from the phase conjugate generation means.
In a hologram recording in which the interference pattern of a signal beam and a reference beam is recorded as page data, a holographically reconstructed image that exhibits good reconstructed data quality can be acquired when the relative positions of a hologram recording within a recording medium associated with an optical system during reconstruction and during recording, match. However, because the distance between the optical system base point during recording and the recording medium changes per recording location due to mechanical flaws in the recording medium and differences in mechanisms that support the recording medium, the depth of the hologram recording within the recording medium changes. Hence, during reconstruction, the hologram cannot be reconstructed at high speed. In the present invention, the distance between the optical system base point, which is associated with a recording medium address during recording, and the recording medium is measured, and said distance is recorded in a memory. During reconstruction, distance information, which is the distance of the recording medium from the memory that is associated with a recording medium reconstruction address, is read, and the position of an aperture filter is adjusted at high speed in the optical axis direction on the basis of the read distance information and a distance measurement result for the optical system base point during reconstruction and the recording medium. Thus, the relative positions of the hologram within the recorded medium associated with the optical system during reconstruction and during recording can be matched.
G11B 7/095 - Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam or focus plane for the purpose of maintaining alignment of the light beam relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track f specially adapted for discs, e.g. for compensation of eccentricity or wobble
G03H 1/26 - Processes or apparatus specially adapted to produce multiple holograms or to obtain images from them, e.g. multicolour technique
G11B 7/0065 - Recording, reproducing or erasing by using optical interference patterns, e.g. holograms
G11B 7/135 - Means for guiding the beam from the source to the record carrier or from the record carrier to the detector
45.
HOLOGRAM RECORDING AND PLAYBACK DEVICE, AND ANGULAR MULTIPLEXING RECORDING AND PLAYBACK METHOD
The present invention has the objective of providing a hologram recording and playback device and an angular multiplexing recording and playback method which are capable of detecting an angular error signal for which, in a two-beam angle multiplexing method, high-speed playback can be achieved and a superior playback signal can be acquired. The present invention is provided with: a light source which emits a light beam; a branch element which branches the light beam, emitted from the light source, into a signal light and a reference light; angle-variable elements for modifying the incident angle of the reference light that is incident to the optical information recording medium; a spatial light modulator for adding information to the signal light; an objective lens for radiating the signal light to the optical information recording medium; an imaging element for detecting diffracted light generated from a recording region within the optical information recording medium when the reference light is radiated upon the optical information recording medium; and a detection system for detecting at least two angular error signals, which are first and second angular error signals, for controlling the angle-variable elements. Switching is performed between the first and second angular error signals, and at least one angle-variable element is controlled, and thereby, it is possible to achieve the objective.
Due to properties of a hologram recording medium, according to a formation state of an already-recorded hologram recording unit, optimal recording positions when performing recording of recording units in the vicinity of the already-recorded recording unit are different. Specifically, if within a specific amount of time from having performed recording of one recording unit, it is possible to record the next recording unit in a region separated by a first interval; however, after a predetermined amount of time has elapsed, it is necessary to record the next recording unit in a region separated by a second interval. To this end, a recording method that is suitable for the above-mentioned properties is desired, and therefore, it is necessary to provide a suitable recording method for hologram recording. A recording and playback device for an optical information recording medium is characterized by: having a drive unit which executes data recording to the optical information recording medium, and a control unit which controls recording and playback by the drive unit; and the drive unit, when recording data to the vicinity of an already-recorded recording unit in a recording medium for which positions of recording units are established in advance, recording to the recording unit region that is closest to the already-recorded recording unit if the amount of time that has elapsed since performing recording to the already-recorded recording unit is less than a predetermined amount of time, and, if the amount of time that has elapsed since performing recording to the already-recorded recording unit is greater than or equal to the predetermined amount of time, recording the data to a recording unit at a position that is separated by at least one recording unit from the already-recorded recording unit.
The present invention addresses the problem of providing a disk device and disk recording method whereby data can be efficiently and highly reliably recorded on a hologram disk. In the present invention, by making it possible to adjust a cure processing range, a data recording region is reserved having a size that corresponds to the amount of recording data specified by a host device.
When data transmission/reception is performed between different services on a network, data acquired by one of the services needs to be updated to the other of the services after being once downloaded to a user terminal. In the present invention, information for an access and charging of a fee is notified, as appropriate, to a server in a service requiring the information, and information for a data request or an access is notified from the server to a server in the other service. Because a data transfer is performed between the servers, data transmission/reception can be performed smoothly without the intervention of a user terminal.
In the present invention, a product presentation server is provided with the following: a product viewing terminal used by a user via a network; a communication means that communicates data relating to product purchases; a data accumulation means that accumulates product management data that stores information relating to products, and purchase history management data that stores purchase history for products purchased by a user; a user status acquisition means that acquires a user status for a user at the time of product purchase; a preference extraction means that extracts user purchase tendencies for each user status, on the basis of the purchase history management data; and a preference synthesis means that synthesizes, and stores in the data accumulation means, the preference management data for each user status extracted by the preference extraction means. The communication means extracts a product suited to the preference management data from the product management data, and sends data indicating the extracted product to the product viewing terminal.
In an optical information recording medium in which, in one of either a front face or a rear face of a recording layer, a boundary with an adjacent intermediate layer forms a reflecting surface, recording and playback conditions are different according to which of the front face/rear face forms the reflecting surface. Therefore, the invention is an optical recording medium on which, with regard to each recording layer, information representing which of the front face/rear face is a reflecting surface has been described in a medium control information area, as well as a recording and playback method using the same.
OPTICAL INFORMATION RECORDING AND PLAYBACK DEVICE, OPTICAL INFORMATION RECORDING AND PLAYBACK SYSTEM, AND OPTICAL INFORMATION RECORDING AND PLAYBACK METHOD
The objective of the present invention is, without unnecessarily wasting or destroying a recording area of an optical information recording medium which is hologram recording material, to avoid medium destruction by way of erroneous handling of media. The present invention is characterized in being an optical information recording and playback device which records once, records data as a hologram upon an optical information recording medium which is capable of a plurality of counts of playback, and plays back data from the optical information recording medium, the device being provided with a laser source which emits a beam, a seek operation verification unit which verifies that a seek operation has completed, and a light emission control unit which controls irradiating the beam upon the optical information recording medium; wherein the light emission control unit mounts the optical information recording medium onto the optical information recording and playback device, and then controls irradiation of the beam so that the area initially irradiated by a playback wavelength or a recording wavelength by the optical information recording and playback device is a predetermined area of the optical information recording medium, and the predetermined area is an area capable of recording data.
Provided is an optical information recording and reproduction apparatus and an optical information recording and reproduction method that enable high quality signals to be reproduced at high speed. This optical information reproduction apparatus reproduces information from an optical information recording medium whereon an interference pattern of signal light and reference light is recorded as page data. The optical information reproduction apparatus is characterized by being provided with: a laser light source; a splitting element that splits light emitted from the laser light source into signal light and reference light; a filter that minimizes the effects of crosstalk between adjacent holograms; a light detection unit that detects a position error signal of the filter from diffracted light that is diffracted when the optical information recording medium is irradiated with the reference light; and a control unit that controls the filter. The optical information reproduction apparatus is further characterized in that the control unit controls the filter in response to the position error signal detected by the light detection unit.
G11B 7/09 - Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam or focus plane for the purpose of maintaining alignment of the light beam relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track f
G11B 7/135 - Means for guiding the beam from the source to the record carrier or from the record carrier to the detector
53.
OPTICAL-INFORMATION RECORDING/PLAYBACK DEVICE AND OPTICAL-INFORMATION RECORDING/PLAYBACK METHOD
Optical recording/playback devices which use holograms exhibit problems such as the optical beam from a laser hitting a liquid crystal element and causing the liquid crystal thereof to deteriorate. In addition, when using a mechanical shutter, there is the problem of the mechanical shutter itself having inertia and consequently not being suitable for high-speed operation. This device is an optical-information recording/playback device for recording information onto a recording medium and/or playing back information from the recording medium, and configured so as to be equipped with a laser-beam source for emitting a laser beam, a first light-shielding part capable of switching between transmission and shielding of the laser beam emitted from the laser-beam source, a drive circuit for driving the switching of the transmission or shielding of the first light-shielding part, and a first movement unit for moving the first light-shielding part.
The objective of the present invention is to provide an information recording/reproducing device capable of reproduction from a holographic recording medium by means of a simple procedure. The information recording/reproducing device for an optical information recording medium has: a drive unit that executes data recording to the optical information recording medium; and a control unit that controls the recording/reproducing of the drive unit. The control unit splits recording source data into recording units stipulated by a recording medium specification or a drive specification, extracts the split recording source data, groups by recording group units, transmits data to the drive unit in the grouped recording group units, and instructs recording.
Provided is an optical information reproduction device in which holography is used, wherein the multiplexing, the wavelength, and the vertical angle of the reference light can be appropriately corrected during data reproduction. Also provided is a method for performing same. An optical information reproduction device for using holography to reproduce information from an optical information recording medium, wherein reference light multiplexing and vertical angle error signals are generated from a signal detected by a light detector; the reference light multiplexing and vertical angle are adjusted using the vertical angle adjustment unit on the basis of the angle error signal; a wavelength error signal is generated from the signal detected by the light detector; and the wavelength is adjusted on the basis of the wavelength error signal.
An optical information recording and reproducing system and a pickup state management method are provided for a system in which a control device instructs recording and reproducing using an optical information recording and reproducing device which requires time until the optical beam irradiated from a light source is in a state optimal for recording and reproducing. This optical information recording and reproducing system is provided with an optical information recording and reproducing device which performs data recording and reproducing in an optical information recording medium, and a control device of the optical information recording and reproducing device. The control device is provided with a pickup state instruction unit which instructs the optical information recording and reproducing device to perform state transitions of a pickup equipped in the optical information recording and reproducing device, and the optical information recording and reproducing device is provided with a controller unit which controls state transitions of the pickup in accordance with instructions of the control device.
G11B 7/0065 - Recording, reproducing or erasing by using optical interference patterns, e.g. holograms
G11B 7/125 - Optical beam sources therefor, e.g. laser control circuitry specially adapted for optical storage devices; Modulators, e.g. means for controlling the size or intensity of optical spots or optical traces
57.
IMAGING DEVICE, CONTROL DEVICE, AND INFORMATION REPRODUCTION DEVICE
To devise the driving method so as to improve the frame rate, in an imaging element having a function for partially transmitting image data corresponding to a partial region on the imaging surface, when the input/output interface of the imaging element is representing a frame-rate-restricting factor. A table for recording the coordinate ranges of a plurality of regions is provided, and the image data for the plurality of coordinate ranges is continuously or alternately transmitted.
H04N 5/345 - Extracting pixel data from an image sensor by controlling scanning circuits, e.g. by modifying the number of pixels having been sampled or to be sampled by partially reading an SSIS array
An objective of the present invention is to implement suitable record/play with respect to a holographic recording medium. Provided is an optical information record/play device whereby recording and/or play of information upon an optical informaiton recording medium is carried out, said device comprising: a light detector which detects a two-dimensional play image which is obtained from the optical information recording medium; a medium rotation unit which rotates the optical information recording medium; an in-plane movement unit, further comprising a movable part which is capable of moving in a plane which is approximately parallel to the optical information recording medium; eccentricity detection units which, using a mark for eccentricity detection which is disposed upon the optical information recording medium, detect the location of the optical information recording medium for each movable axle of the in-plane movement unit; an eccentricity compensation unit which controls the in-plane movement unit on the basis of output signals of the eccentricity detection units; and an offset addition unit which adds, to the output signals of the eccentricity detection units, an offset quantity which is derived on the basis of the information of the two-dimensional play image which the light detector has detected.
G11B 7/095 - Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam or focus plane for the purpose of maintaining alignment of the light beam relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track f specially adapted for discs, e.g. for compensation of eccentricity or wobble
G11B 7/0065 - Recording, reproducing or erasing by using optical interference patterns, e.g. holograms
59.
OPTICAL INFORMATION RECORDING AND PLAYBACK DEVICE AND OPTICAL INFORMATION RECORDING AND PLAYBACK METHOD
In order to provide an optical information recording and playback device capable of accurate positioning, an optical information recording and playback device which causes an optical beam to diverge into reference light and signal light which are caused to interfere, records acquired interference fringes as a hologram on an optical information recording medium, and radiates the reference light onto the optical information recording medium so as to play back the recorded hologram, has: an imaging element which radiates the reference light onto the optical information recording medium, and among the acquired reproduced light, detects the reproduced light that has passed through an aperture portion (101) so as to generate a playback signal; photodetectors (104a, 104b, 104c, and 104d), which are different from the imaging element, and which detect, among the reproduced light, the reproduced light that is radiated onto the periphery of the aperture portion (101); and a calculation unit which calculates a position error signal on the basis of the output of the photodetectors.
G11B 7/09 - Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam or focus plane for the purpose of maintaining alignment of the light beam relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track f
G11B 7/0065 - Recording, reproducing or erasing by using optical interference patterns, e.g. holograms
G11B 7/08 - Disposition or mounting of heads or light sources relatively to record carriers
60.
OPTICAL INFORMATION PLAYBACK DEVICE AND OPTICAL INFORMATION PLAYBACK METHOD
There has been the problem that, in a hologram memory, there may exist luminance non-uniformity within a page as a result of diffraction intensity non-uniformity within a diffraction image, caused by a defect in a recording medium or optics. In the present invention, when reproducing two-dimensional page data from an optical information recording medium, the reproduced two-dimensional page data is partitioned, for each unit having a misalignment detection-use marker embedded in the page data, into a plurality of areas, and in the group of partitioned two-dimensional areas, AGC processing is individually performed using the luminance information of the markers.
This recording/reproducing apparatus that records or reproduces information by radiating light to a recording medium is provided with: a medium rotating unit that rotates the recording medium; a moving unit having a movable unit that is capable of moving within a predetermined plane; a rotation angle detecting unit that detects a rotating angle of the recording medium using an angle detection mark that is provided on the recording medium; a position detecting unit that detects a position of the recording medium using an eccentricity detection mark that is provided on the recording medium; and a member for fixing the rotation angle detecting unit and the position detecting unit. With respect to the member, the movable unit relatively moves within a plane substantially parallel to the recording surface of the recording medium, and the medium rotating unit is fixed to the movable unit.
G11B 7/095 - Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam or focus plane for the purpose of maintaining alignment of the light beam relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track f specially adapted for discs, e.g. for compensation of eccentricity or wobble
G11B 7/0065 - Recording, reproducing or erasing by using optical interference patterns, e.g. holograms
An objective of the present invention is to provide a hologram recording and/or playing device whereby it is possible to accurately detect an angle of inclination of a holographic medium, and to carry out a correction. The hologram recording/playing device comprises a medium attitude detection unit which is configured, in at least a pair of sites, of a combination of a light source which emits a light beam upon the holographic medium and a light location detection unit which receives the light beam which is reflected by the holographic medium. The medium attitude detection means are positioned in different locations in the radius direction and/or a tangent line direction which is orthogonal to the radius direction.
G11B 7/0065 - Recording, reproducing or erasing by using optical interference patterns, e.g. holograms
G03H 1/26 - Processes or apparatus specially adapted to produce multiple holograms or to obtain images from them, e.g. multicolour technique
G11B 7/095 - Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam or focus plane for the purpose of maintaining alignment of the light beam relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track f specially adapted for discs, e.g. for compensation of eccentricity or wobble
63.
OPTICAL INFORMATION RECORDING DEVICE, OPTICAL INFORMATION RECORDING/REPRODUCTION DEVICE, OPTICAL INFORMATION RECORDING METHOD, OPTICAL INFORMATION RECORDING/REPRODUCTION METHOD, AND OPTICAL ELEMENT
In this optical information recording/reproduction method: when the drive rate of a phase mask changes during recording, the phase of pixel units of signal light is altered in a manner so that the phase change rate of the pixel units is uniform or at least a uniform amount within a page and among pages, by which means an increase in recording multiplexing number resulting from the homogenization of media consumption during angular multiplexed recording and favorable and stable signal recording are achieved; and while moving an optical element, which adds phase information to a light beam containing information of two-dimensional page data, in a direction perpendicular to the optical axis of the light beam, phase information is added to the light beam and the page data is recorded to a recording medium. The optical information recording/reproduction method is characterized in that when recording page data of at least two differing pages, the information is recorded to the recording medium while moving the optical element in a manner so that the speed of the phase change of the light beam at any given position in the region at which the light beam containing the information irradiates the optical element is at a predetermined value, at least a predetermined value, or no greater than a predetermined value. Also provided is an optical information recording/reproduction device applying the method.
The purpose of the present invention is to provide a holographic optical pickup device capable of performing high-speed reproduction, a holographic device, and a high-speed image pickup device. Disclosed is an optical pickup device that reproduces information from a recording medium having an interference pattern of signal light and reference light recorded thereon as a hologram. The optical pickup device is characterized in being provided with: a laser output section that outputs the reference light; a lens through which the reference light outputted from the laser output section is inputted to an optical information recording medium; and a detection optical section that detects diffracted reproducing light from the optical information recording medium on the basis of the reference light. The optical pickup device is also characterized in that the detection optical section includes a plurality of image pickup elements.
In an information recording/reproduction device for recording/reproducing information by using a hologram, if a hologram is recorded in environments where the temperature of a recording medium varies, a hologram for which reproduction conditions are not uniform is recorded consequently. The amount of information to be recorded continuously on an optical information recording medium is varied according to an amount of change in the temperature of the optical information recording medium. For example, by reducing the amount of information to be recorded when the amount of change in the temperature of the optical information recording medium is large, while increasing the amount of information to be recorded in the case where the amount of change in the temperature thereof is small, a hologram for which reproduction conditions are uniform can be recorded, and influences of temperature changes during recording can be reduced.
When recording layers were provided on both the front and back sides of an optical disk in order to increase the recording capacity, whether the reproducing surface of the optical disk taken out of the cartridge was the front side or the back side could not be determined. This problem can be solved by adding to the BCA, in addition to disk identification information: type information indicating whether a recording surface is provided on one side or both sides; side information indicating whether the surface with which reproduction is being performed is side A or side B; recording layer quantity information indicating whether the disk has a single layer or a double layer; information indicating the areas other than the BCA and the directions in which data on the read-in, data zones, and read-out are recorded/reproduced; and information indicating the presence/absence of a disk cartridge.
G11B 7/00 - Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation, reproducing using an optical beam at lower power; Record carriers therefor
G11B 7/24 - Record carriers characterised by shape, structure or physical properties, or by the selection of the material
G11B 7/007 - Arrangement of the information on the record carrier, e.g. form of tracks
G11B 19/12 - Control of operating function, e.g. switching from recording to reproducing by sensing distinguishing features of records, e.g. diameter
G11B 20/12 - Formatting, e.g. arrangement of data block or words on the record carriers
G11B 27/32 - Indexing; Addressing; Timing or synchronising; Measuring tape travel by using information detectable on the record carrier by using information signals recorded by the same method as the main recording on separate auxiliary tracks of the same or an auxiliary record carrier
The projection display system has a light source unit where a first light source and a second light source respectively emitting a first and second wavelength or wavelength range of light are juxtapositionally arranged; a third light source emitting a third wavelength or wavelength range of light; an optical combiner device for combining the three wavelengths or wavelength ranges of light from the light sources; an optical device for averaging distributions of the wavelengths or wavelength ranges of light; an image display device for receiving the light transmitted through the optical device and forming image light responsive to a video signal; and a projector lens for projecting the image light onto a screen. At least two of the optical axes of the first, second, and third wavelengths or wavelength ranges of light which are incident on the optical device are not coincident with each other.
An optical pickup, including a housing, and an optical element mounted on the housing, wherein the optical element is fixed onto wall surfaces of the housing via adhesive agents on both sides of a certain single surface of the optical element, the optical pickup, further including a protrusion portion on the other side of a surface with the optical element positioned therebetween, the surface being orthogonal to the wall surfaces of the housing, the protrusion portion protruding from the housing, the front end of the protrusion portion protruding than the adhesive agents in a direction away from the wall surfaces.
G11B 7/00 - Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation, reproducing using an optical beam at lower power; Record carriers therefor
G11B 21/22 - Supporting the heads; Supporting the sockets for plug-in heads while the head is out of operative position
G11B 7/22 - Apparatus or processes for the manufacture of optical heads, e.g. assembly
G11B 7/135 - Means for guiding the beam from the source to the record carrier or from the record carrier to the detector
69.
OPTICAL INFORMATION RECORDING MEDIUM, OPTICAL INFORMATION RECORDING/REPLAYING METHOD, AND OPTICAL INFORMATION RECORDING/REPLAYING DEVICE
In the present invention, signal light can be positioned in the same position regardless of the device performing recording/replaying even in a medium in which page data is not recorded. This optical information recording medium: has a recording radius region for recording data; is provided with a buffer region that does not have data recording at the outer peripheral side and/or inner peripheral side of the recording radius region; has a rotational angle detection pattern across the entire perimeter of the outer peripheral side of either the recording radius region or the buffer region, or the inner peripheral side of either the recording radius region or the buffer region; and is further provided at a specific rotational angle of the rotational angle detection pattern with a positional baseline pattern that is not interrupted across the entire radius range of the buffer region. The positional baseline pattern is formed with a structure having a reflectance or transmittance differing from that of the other region of the recording radius region.
Provided is a method for determining an appropriate recording irradiation energy in which it is possible to reduce the time taken to calculate the appropriate irradiation energy for hologram recording. A method for determining an appropriate recording irradiation energy for an optical disk capable of multiplex recording of a plurality of items of page data using holography, wherein the method has: a first step for multiplex-recording a plurality of items of test data at a predetermined irradiation energy; a second step for reproducing, without performing a post-cure process, the items of test data recorded in the first step, and calculating the diffraction efficiency on the basis of the size of the signal light for each of the pages; a third step for estimating the diffraction efficiency after the post-cure process on the basis of the diffraction efficiency calculated in the second step; a fourth step for obtaining the approximation curve for the relationship between the irradiation energy of the first step and the diffraction efficiency estimated in the third step; and a fifth step for determining the appropriate recording irradiation energy from the approximation curve from the fourth step.
The present invention provides an image display device and a terminal device that are easy to use. The present invention is provided with a display unit for displaying video content, a receiving unit for receiving a command transmitted by the terminal device, and a control unit for executing a process corresponding to the command received from the receiving unit. The control unit executes a process corresponding to a first command when the first command is received from a specific terminal device, but not a process corresponding to the first command when the first command is received from another terminal device; and executes a process corresponding to a second command when the second command is received from the specific terminal device or the other terminal device.
Provided are a content display device that presents meta-information that is related to an object in a moving picture and that is tied to position information while presenting a moving picture content, and a content display method. Moving picture image information and AR information including the AR tag, acquisition location information enabling the acquisition of information related to the object by accessing a server storing the information, time information about the start and end of a moving picture image, and position information indicating the display position of the AR tag in the moving picture image at the time information intervals are transmitted. The moving picture image information and the AR information that have been transmitted are received.
The purpose of the present invention is to achieve suitable recording on a hologram recording medium. After a first predetermined region of a hologram recording medium is subjected to region recording processing in which holograms in which information is recorded are arranged at predetermined intervals inside the first predetermined region, signal light and reference light are illuminated on a different region from the first predetermined region to record information therein before post-curing of the first predetermined region is carried out.
In the land-groove method, wobble interference is reduced. STW modulation is used as wobble modulation for a part where wobble interference can occur, for example, a part where the configurations of both side walls of the groove are not the same and groove width modulation is unavoidable. Thereby, the amplitude of the groove width modulation can be suppressed to a quarter of that when BPSK modulation is used.
Provided is a lighting device which has a good balance between improvement of light utilization efficiency and decrease of color unevenness. A lighting device of the present invention comprises a reflection sheet (4) and an optical element (1) that is arranged at a predetermined distance from the reflection sheet (4). In the space between the reflection sheet (4) and the optical element, this lighting device is provided with: an LED (2) for emitting light in a direction parallel to a light exit surface of the lighting device; and an optical sheet (5) that is arranged on the light exit surface side of the optical element. This lighting device is characterized in that: the optical element (1) is provided with a light blocking pattern (6) on the light exit surface-side surface at a position corresponding to the LED (2); this light blocking pattern (6) is configured by laminating a plurality of light blocking layers; the light blocking layer closest to the optical element among the light blocking layers is configured of a white ink; and at least one of the other light blocking layers is configured of a mixed ink of a white ink and a blue ink, or a mixed ink of a white ink, a blue ink and a black ink.
A holographic memory apparatus includes an optical detector which receives reflected light of reference beam from the surface of a hologram recording medium. An incident angle of the reference beam is estimated on the basis of information on a focused position on the optical detector. When the incident angle is different from a target incident angle, the incident angle of the reference beam is adjusted according to a difference between the incident angle and the target incident angle.
G11B 7/00 - Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation, reproducing using an optical beam at lower power; Record carriers therefor
77.
VIDEO TRANSMISSION METHOD, CAPTION DISPLAY DEVICE, AND VIDEO TRANSMISSION DEVICE
In the prior art, in relation to display of captions, no consideration was given as to selection of the display device for displaying captions. The present invention in one aspect thereof provides a video transmission method for use in a video display system in which a video transmission device that transmits a video signal, a display device that receives and displays the video signal transmitted by the video transmission device, and a caption display device that receives and displays caption information from the video transmission device, are connected through a network, wherein the method includes: a step in which the caption display device requests information about the content being displayed by the display device; a step in which the display device transmits information about the content being displayed by the display device; a step in which the transmitted content information is acquired by the caption display device; a step in which the caption display device, on the basis of the acquired content information, requests caption-related information relating to captions for the content in question; a step in which the video transmission device transmits the caption-related information; a step in which the caption display device acquires the transmitted caption-related information; a step in which the caption display device displays displayable caption information on the basis of the acquired caption-related information; a step in which the caption display device requests transmission of caption information selected from the displayed caption information; a step in which the video transmission device transmits the requested caption information; a step in which the caption display device acquires the transmitted caption information; and a step in which the caption display device displays the acquired caption information.
The purpose of the present invention is to inhibit uneven brightness due to deviation in the relative position relationship between light distribution adjustment members and light sources that is generated by thermal expansion. An illumination device according to the present invention is configured such that light is emitted in a space (105) between a reflection sheet (101) and light distribution adjustment members (103) spaced away from the reflection sheet (101) by a prescribed gap, said light being emitted in a direction parallel to the light exit face of the illumination device from LED rows (1-1, 1-2, 1-3) formed from a plurality of LEDs arranged in rows. Multiple LED rows are arranged along the light-emission direction of the LEDs, and a light distribution adjustment members (103) is disposed for each LED row. A first gap (d1) is provided in between the light distribution adjustment members (103). When the gap between the LED rows in the light-emission direction of the LEDs is assumed to be Py, the first gap (d1) is located a distance of Py/2 or greater away from a respective LED row in the light-emission direction of the LEDs.
A display apparatus is used in relatively large rooms, and therefore, a large screen is often used for display. Meanwhile, for a display terminal, display using a small screen is often performed. Therefore, there has been the problem that when the same image has been displayed on a display apparatus and a display terminal, the display image has been small and fine portions therein could not be determined on the display terminal, resulting in inconvenience. The present invention is a display system comprising a display apparatus and a display terminal, wherein: the display apparatus detects position coordinates optically indicated upon an image and displayed by a pointer; the display apparatus displays a predetermined pointer mark at the detected position coordinates; and the display terminal zooms in so as to be substantially centered on the received position coordinates and displays the predetermined pointer mark at the position coordinates.
Provided are: an image display system capable of clearly displaying, with ease, noteworthy sections of a display screen of an image display device for displaying output images of an information terminal; an information terminal; and an information-terminal control method and control program. This image display system is configured from: an information terminal which displays a plurality of application windows; and at least one image display device which is connected to the information terminal, and which displays the content of one application window from among the application windows. The information terminal is provided with a designation means for designating the display state and the display destination of the content of the application window. The image display device designated by the designation means is configured to display in a state identical to or different from the application-window display content of the information-terminal, in accordance with the display state designated by the designation means.
The present invention provides an optical information recording/reproduction device for appropriately adjusting recording conditions and a method and medium therefor in order to solve the problem in which the signal to noise ratio (SNR) during reproduction declines due to variations in the environment during recording, variations in components such as a laser output, and variations in the production of the device unless the conditions during recording are adjusted in an optical information recording/reproduction device using a holograph. An optical information recording/reproduction device for recording or reproducing information on an optical information recording medium by using a holograph adjusts the recording conditions before recording user data in an adjustment region on the optical information recording medium disposed for the purpose of adjusting the recording conditions.
The present invention provides an optical information reproduction device for appropriately adjusting reproduction conditions and a method therefor in order to solve the problem of not being able to efficiently use the output-able range of a photodetector due to changes in the reproduction light intensity caused by the angle of reference light in an optical information reproduction device using a holograph. An optical information reproduction device for reproducing information from an optical information recording medium by using a holograph adjusts the reproduction conditions such that the reproduction light intensity becomes almost constant regardless of the angle on the basis of information pertaining to the reciprocal number of the reproduction light intensity before or during the reproduction of user data and on the basis of information pertaining to the reproduction condition when the aforementioned reproduction light intensity was obtained.
The present invention is a program information transmission device which receives a digital broadcast that includes program information. A program information processing unit (411) acquires, from a PES or ES that includes information of the broadcast program, such program information as a broadcasting schedule or a program title in order to configure a program information table. A program table generation unit (410) references the program information processing unit (411), and using information on the acquired broadcast program, generates an electronic program table which provides a user interface (UI) that includes a scheduling button that allows recording or scheduling of viewing of a desired program.
H04N 7/173 - Analogue secrecy systems; Analogue subscription systems with two-way working, e.g. subscriber sending a programme selection signal
H04H 60/27 - Arrangements for recording or accumulating broadcast information or broadcast-related information
H04H 60/80 - Arrangements characterised by transmission systems other than for broadcast, e.g. the Internet characterised by source locations or destination locations characterised by transmission among terminal devices
H04N 5/445 - Receiver circuitry for displaying additional information
Unexpected fluctuations in the effects and efficacy of ingested foods and prescription drugs must be prevented. This invention is a product purchasing system for enabling a user to purchase a product having a use-by date, the system being provided with: a determination means for determining whether or not it would be detrimental for a user to consume the product during the period up to the best-before date; and a caution means for urging caution when it has been determined that consuming the product during the period up to the best-before date would be detrimental.
In a data recording and reproducing apparatus that includes a host computer and a drive in order to improve data reliability, in data recording, the host computer appends a first error correction code to the data and the drive appends a second error correction code to the data. When a failure has occurred in error correction performed by the drive using the second error correction code, the drive reads out the first error correction code and performs error correction using the first error correction code. Since error correction using the first error correction is possible even when error correction using the second error correction code ends in failure, the reliability of data is improved.
H03M 13/00 - Coding, decoding or code conversion, for error detection or error correction; Coding theory basic assumptions; Coding bounds; Error probability evaluation methods; Channel models; Simulation or testing of codes
G06F 11/10 - Adding special bits or symbols to the coded information, e.g. parity check, casting out nines or elevens
G11B 20/18 - Error detection or correction; Testing
86.
OPTICAL INFORMATION RECORDING AND REPRODUCING DEVICE, OPTICAL INFORMATION RECORDING AND REPRODUCING METHOD, AND REPRODUCING DEVICE
In recording and reproducing devices that use angular-multiplexing holography, accessing a recorded hologram of interest had taken time because after positioning at the vicinity of the hologram, it had been necessary to carry out fine adjustment of the position while checking the signal quality of the hologram. The optical information recording and reproducing device according to the present invention uses angular-multiplexing to record interference patterns formed from a signal beam and a reference beam onto an optical information recording medium as page data and reproduces information from the optical information recording medium, said optical information recording and reproducing unit being provided with: a light-source unit that outputs light; an optical splitting unit that splits the light into a reference beam and a signal beam; an angle controlling unit that controls the angle for the direction of angle multiplexing at which the reference beam enters the optical information recording medium; an optical detecting unit that detects a reproduced image that is reproduced by using the reference light; and a position control unit that controls the position relationship between the reference beam and the optical information recording medium. The device treats a set of page data as a book, and during recording, at least a portion of the page data in adjacent books is recorded while the entrance angle for the direction of angular-multiplexing for the reference light is shifted by means of the angle controlling unit. During reproduction, at least a portion of the light amount of a reproduced image is detected by using the optical detecting unit, and the position of the book is detected on the basis of information about the detected light amount.
The present invention, while implementing thinness and high efficiency, provides an inexpensive projection-type video display device. This projection-type video display device comprises: a first optical element (2) which collects light from a light source; a second optical element (4) which causes light from the first optical element to achieve a light distribution of a uniform intensity; a relay lens (5) which transmits light from the second optical element; a first mirror (61) which reflects light from the relay lens; a second mirror (71) which reflects light from the first mirror; a reflecting video display element (8) which displays an image on the basis of a video signal and reflects light from the second mirror; and a projection lens (9) which projects light from the reflecting video display element. The first mirror is positioned upon an optical axis of the relay lens. A reflecting face of the second mirror is formed such that the distance of each light beam of the primary light beam which forms an image in the reflecting video display element and in which the emission angle from the relay lens is equal from a multiple reflecting element emission face to the reflecting video display element is made equal.
Deduplication is executed in a storage device having low random access performance, such as an optical disk library. When an optical disk that is not inserted into an optical disk drive needs to be accessed in order to execute binary compare, data to be binary compared is stored in a temporary memory area in order to postpone the binary compare, and on the timing when the optical disk is inserted, the postponed binary compare is executed. Before second deduplication, which is deduplication between data to be stored in the storage device and the data in the optical disk library, is executed, first deduplication, which is deduplication between the data to be stored in the storage device and the data in the temporary memory area, is executed.
Provided are an optical information reproducing device, which takes advantage of holography and can precisely detect a well-known pattern disposed at a prescribed location within a page and used for correcting position deviation, rotation deviation, and magnification deviation, and the method thereof. The optical fiber reproducing device that takes advantage of holography to reproduce information from an optical information recording medium is characterized by comprising a detection unit that detects the position information of a marker as a well-known pattern from a page as a 2-dimensional reproduction signal from a hologram, a detection error position estimating unit that estimates presence/absence of detection error in the position information of the marker detected by the detection unit and estimates the position where the detection error occurs if there is detection error, a position correcting unit that corrects the marker position information of the detection error position specified by the detection error position estimating unit, and a signal detection unit that detects each signal from within the page based on the marker position information corrected by the position correcting unit.
The present invention manages presentation materials and references presented by a liquid crystal projector on a cloud, and thereby achieves centralized management of the information, allows browsing of the information for only the participants of a presentation, and prevents secondary distribution of the information. The presentation materials and the related information are subjected to centralized management in a cloud. The projector at each presentation site can receive the presentation materials at a specified time and project and present these materials. A database is provided on the cloud to retrieve the related references in synchronization with each page of the presentation materials. By giving access rights to the related references only to the terminals of the participants attending the presentation site, the related references can be retrieved and acquired from the database. The obtained references can only be retrieved and reproduced by the terminals at the presentation site.
This energy-saving behavior assistance system (10) is provided with: a storage unit; a target computation unit (109); an energy consumption measurement unit (160); a behavior performance input unit (106); an achievement level computation unit (113) that computes an achievement level; and a display section. The achievement level computation unit (113): uses a reduction value stored in the storage unit to compute a reduction result value that has been reduced by means of a result of performance of energy-saving behavior of a user; and computes the achievement level by comparing the reduction result value with a target value. The display section displays the computed achievement level.
Provided is an illuminating apparatus having improved use efficiency of light outputted from a light source. This illuminating apparatus is provided with a light source (3), a light source substrate (4) having the light source mounted thereon, a bent first reflecting section (1), and a flat-board-like second reflecting section (2). The light source (3) is mounted on the light source substrate (4) such that the light outputting direction of the light source (3) is parallel to the light source substrate (4) surface having the light source mounted thereon. The first reflecting section (1) has a reflecting surface provided on the inner surface, and is bent such that the first reflecting surface covers the upper portion and the rear surface of the light source (3), and that an opening faces the light outputting direction of the light source (3), and the first reflecting section reflects and outputs the light toward the opening, said light having been outputted from the light source. The second reflecting section (2) has a reflecting surface provided on the front surface thereof, and reflects the light outputted from the first reflecting section (1) and the light source (3), and illuminating light of the illuminating apparatus is obtained.
An imaging device is provided with a lens distortion correction function that requires little circuit structure and does not degrade image resolution. The imaging device achieves the lens distortion correction function by means of a configuration comprising: a same-color interpolation unit that generates a lens distortion-corrected interpolation signal using same-color pixels within an image signal from an imaging element; a luminance signal generation unit that generates a luminance signal on the basis of the image signal from the imaging element; a first luminance interpolation unit and a second luminance interpolation unit that use the luminance signal generated by the luminance signal generation unit to generate a lens distortion-corrected interpolation signal; a lens distortion characteristics table data unit that maintains information regarding coordinates after correction for lens distortion characteristics in a memory; a coordinate/interpolation coefficient-setting unit that generates a separate interpolation coefficient for correcting lens distortion for each of the same-color interpolation unit, the first luminance interpolation unit, and the second interpolation unit on the basis of information from the lens distortion characteristics table data unit; and a correction unit that outputs a lens distortion-corrected interpolation signal by correcting the signal from the same-color interpolation unit on the basis of a comparison of the interpolation signal generated by the first luminance interpolation unit and the interpolation signal generated by the second luminance interpolation unit.
Provided is a program information transmission device that provides program information via a network. The program information transmission device receives a digital broadcast containing first program information that describes attributes regarding a program, and is characterized by the provision of: a program information processing unit that acquires the first program information from the digital broadcast signal; a device information provision unit that provides device description information describing commands for controlling the program information transmission device to other devices that are connected to the network; a program information conversion unit that uses the first program information acquired by the program information processing unit to generate an EPG object comprising the broadcast system, organization channel, and property information for a program; a program information provision unit that provides the generated EPG object as second program information in response to a first command sent from another device; and a programmed recording unit that carries out specified program recording settings in response to a second command sent from another device. The program information transmission device is additionally characterized in that the first and second commands contain property information for specifying a program, said information having been provided by another device.
The present invention provides a lighting device that is lightweight and that can easily and inexpensively be increased in size. The lighting device of the present invention is provided with LEDs that serve as light-emitting elements, and is characterized by the provision of: a base chassis provided with an opening in the illumination direction; an LED substrate that is mounted on the base chassis; a plurality of LEDs that are mounted on the LED substrate so as to emit light in a direction that is parallel to the LED substrate; a diffusion plate that is arranged in the opening of the base chassis and that has a function of propagating light in a direction that is parallel to the light emission direction of the LEDs; and a diffusion cover that is arranged at a predetermined distance from the diffusion plate.
F21S 2/00 - Systems of lighting devices, not provided for in main groups or , e.g. of modular construction
F21S 8/02 - Lighting devices intended for fixed installation of recess-mounted type, e.g. downlighters
F21Y 101/02 - Miniature, e.g. light emitting diodes (LED)
96.
Optical pickup device and optical disc apparatus for recording and reproducing information on and from optical disc including plurality of recording layers
Provided is an optical pickup device that suppresses a fluctuation of a tracking error signal caused by stray light when recording/reproducing information on/from an optical disc including a plurality of recording layers and attains size reduction. It includes a laser diode emitting laser light of about 405 nm in wavelength, an objective lens irradiating the optical disc with an optical beam emitted from the laser diode and having a numerical aperture of about 0.85, and a detector including a detection part receiving the optical beam reflected from the optical disc. An optical magnification from the optical disc to the detector is set within a range from about 10× to 15×.
G11B 7/00 - Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation, reproducing using an optical beam at lower power; Record carriers therefor
97.
TRANSMITTER APPARATUS, RECEIVER APPARATUS, AND TRANSMISSION/RECEPTION METHOD
The conventional art discloses that the transmitting side transmits various kinds of information on a segment-by-segment basis and the receiving side selects and demodulates any one of the segments. However, the conventional art does not disclose anything about inter-segment information association in which the transmitting side associates and transmits various kinds of information on a multiple-segments-by-multiple-segments basis and the receiver side selects and demodulates segments in accordance with the association. Moreover, the conventional art does not refer to achievement of a service effectively using metadata in a system for performing a content distribution preconditioned on the information association. A transmitter apparatus for transmitting contents and the metadata of those contents comprises a transmission unit for transmitting the contents and the metadata of those contents, and is characterized in that the metadata to be transmitted from the transmission unit includes a plurality of pieces of program content information that are in accordance with reproduction elapsed-times of the contents to be transmitted from the transmission unit.
Provided is a content display device, and a content display method, that can display an application that can be used while images are displayed. The content display device is provided with a display control unit for displaying, on a screen, video and a user interface for an application. The display control unit divides a screen into a first region in which video is displayed reduced, a second region in which a list of applications is displayed, and a third region in which is displayed detailed information about the application selected from among applications, and the display control unit superimposes the second region and the third region. In the operation state of an application list, an application list is displayed in the third region. In the operation state of an application display screen list, the application display screen list is displayed in the second region.
Provided is a distortion correction means for images projected by a projector, allowing for free adjustment so as to minimize the distortion of an image projected by the projector. Using a camera and a terminal having a touch-sensitive panel, the distortion correction means captures an image projected on a screen by the projector, automatically detects the contour of the projected image, and acquires the amount of correction to be applied to the distortion of the projected image according to correction of the shape of the contour made on the screen of the terminal having the touch-sensitive panel via a finger or pen. Based on the amount of correction, quantitative distortion is applied to the shape of two-dimensional image data to be displayed on a projection-image display section of the projector, or the position or the tilt of the projection-image display section is changed, thereby reducing the distortion of the image projected on the screen.
The objective of the present invention is to prevent interference with viewing of a whiteboard caused by a position of a participant filling in the whiteboard, and to store a history of fill-in records for all participants so as to be able to use a history that includes intermediate stages of the fill-in records subsequently. The present invention comprises terminals with touch panels having a function in which terminals of all participants partition arbitrary linework, which has been input, into line segments and sequentially transmit the same to the controller and in which the linework information transmitted from the controller is displayed upon the display of the terminal with the touch panel. Furthermore, the present invention uses a liquid crystal projector, which has a controller that is either built-in or capable of being connected thereto, the controller having a function in which the linework information that has been transmitted from each terminal with a touch panel is added to video image memory for a whiteboard image while being sequentially recorded in a database, and the contents of the video image memory are projected by way of the liquid crystal projector upon a wall surface, while at the same time, the database is transmitted to each terminal with a touch panel.
patents
