A confocal optical measurement apparatus (100) comprises a source of electromagnetic radiation (102) configured to emit electromagnetic radiation at an emission wavelength. The apparatus (100) also comprises a detector module (112) configured to receive electromagnetic radiation, and a dioptric optical system (138, 140) comprising a scannable intermediate optical element (138) and an achromatic objective (140), the scannable intermediate optical element (138) being disposed in an optical path between the detector module (112) and the achromatic objective (138). The apparatus (100) further comprises a multimode optical fibre (132) operably coupled between the detector module (112) and the dioptric optical system (138, 140).
A61B 3/10 - Appareils pour l'examen optique des yeuxAppareils pour l'examen clinique des yeux du type à mesure objective, c.-à-d. instruments pour l'examen des yeux indépendamment des perceptions ou des réactions du patient
A61B 5/00 - Mesure servant à établir un diagnostic Identification des individus
2.
Linear resonance scanning apparatus and method of scanning
A linear resonance scanning apparatus (100) comprises an electromagnetic drive unit (132) comprising a coil (140) wound about a core (138), the electromagnetic drive unit (132) having a field output end (134). A linear motion bearing assembly (106) is configured to carry a permanent magnet (130), the linear motion bearing assembly (106) having a longitudinal axis of reciprocating motion. A biasing element (122, 126) is disposed adjacent an end of the linear motion bearing assembly (106) to serve as a buffer for motion along the longitudinal axis of reciprocating motion. The permanent magnet (130) has a surface located opposite the field output end (134) of the electromagnetic drive unit (132) in spaced relation to the field output end (134) of the electromagnetic drive unit (132). The permanent magnet (130) is laterally offset with respect to the core (138) so that the core (138) substantially does not overlie the permanent magnet (130) when at rest.
G02B 26/08 - Dispositifs ou dispositions optiques pour la commande de la lumière utilisant des éléments optiques mobiles ou déformables pour commander la direction de la lumière
An optical measurement apparatus (100) combines confocal measurement and low coherence interferometric measurement. The apparatus (100) comprises an interferometric measurement subsystem (102) and a confocal measurement subsystem (104) disposed within a housing (101). An optical combiner (136) is configured to provide the interferometric measurement subsystem (102) and the confocal measurement subsystem (104) with irradiative access to a region to be measured located at a substantially static target location. The interferometric measurement subsystem (102) and the confocal measurement subsystem (104) are respectively configured to image longitudinally in respect of a first subregion (162) and a second subregion (164) in the region to be measured. the second subregion (164) being axially spaced from the first subregion (162). A processing resource (152. 154) is operably coupled to the interferometric measurement subsystem (102) and the confocal measurement subsystem (104), and configured to calculate a first range in respect of the first subregion (162) and a second range in respect of the second subregion (164).
G01B 11/14 - Dispositions pour la mesure caractérisées par l'utilisation de techniques optiques pour mesurer la distance ou la marge entre des objets ou des ouvertures espacés
4.
Optical measurement apparatus and method of rapid measurement
An optical measurement apparatus (100) combining confocal measurement and low-coherence interferometric measurement comprising: a Fourier domain interferometric measurement subsystem (104) comprising a spectrometer (110) operably coupled to a reference arm (136), a measurement arm (138) and a source of electromagnetic radiation (106) via an optical coupler (108), the spectrometer (110) comprising a spectral signal generator (146) responsive to received reflected electromagnetic radiation. A confocal measurement subsystem (102) is also provided comprising an optical scanner (120) having a predetermined scan range for longitudinally scanning, when in use, a beam along a region (128) to be measured. A processing resource (142, 144) is operably coupled to the Fourier domain interferometric measurement subsystem (104) and the confocal measurement subsystem (102) and the confocal measurement subsystem (102) shares the measurement arm (138) with the Fourier domain interferometric measurement subsystem (104), the shared measurement arm (138) comprising the optical scanner (120) of the confocal measurement subsystem (102). The reference arm (136) comprises a reference optical reflector element (130, 132, 134), and the processing resource (142, 144) is configured to provide an accumulator (148) operably coupled to the spectral signal generator (146).
G01N 21/31 - CouleurPropriétés spectrales, c.-à-d. comparaison de l'effet du matériau sur la lumière pour plusieurs longueurs d'ondes ou plusieurs bandes de longueurs d'ondes différentes en recherchant l'effet relatif du matériau pour les longueurs d'ondes caractéristiques d'éléments ou de molécules spécifiques, p. ex. spectrométrie d'absorption atomique
G01B 11/06 - Dispositions pour la mesure caractérisées par l'utilisation de techniques optiques pour mesurer la longueur, la largeur ou l'épaisseur pour mesurer l'épaisseur
5.
OPTICAL MEASUREMENT APPARATUS AND METHOD OF RAPID MEASUREMENT
An optical measurement apparatus (100) combines confocal measurement and low coherence interferometric measurement. The apparatus (100) comprises a confocal measurement subsystem (102) and an interferometric measurement subsystem (104) disposed within a housing (138). An optical combiner (126) is configured to provide the confocal measurement subsystem (102) and the interferometric measurement subsystem (104) with irradiative access to a region to be measured (134) located at a substantially static target location. An optical path internal to the housing (138) extends from the optical combiner (126) towards the region to be measured (134), and the internal optical path is common to the confocal measurement subsystem (102) and the interferometric measurement subsystem (104). The confocal measurement subsystem (102) and the interferometric measurement subsystem (104) are configured to image longitudinally. and a length of the internal optical path is fixed.
G01B 11/06 - Dispositions pour la mesure caractérisées par l'utilisation de techniques optiques pour mesurer la longueur, la largeur ou l'épaisseur pour mesurer l'épaisseur
G01N 21/45 - RéfringencePropriétés liées à la phase, p. ex. longueur du chemin optique en utilisant des méthodes interférométriquesRéfringencePropriétés liées à la phase, p. ex. longueur du chemin optique en utilisant les méthodes de Schlieren
6.
OPTICAL MEASUREMENT APPARATUS AND METHOD OF SCANNING A FOCUS
An optical measurement apparatus (100) comprises a point source (102) of electromagnetic radiation and an optical path extending from the point source of electromagnetic radiation to a window (122). An optical input arrangement (108) is also provided and comprises a static input lens. An optical output arrangement (114) of the apparatus comprises a static output lens. The apparatus further comprises an intermediate lens (112) and a scanning mechanism (110) configured to carry the intermediate lens (112). A position measurement system is operably coupled to the scanning mechanism (110) and configured to measure a position of the intermediate lens (112). The optical input arrangement (108), the intermediate lens (112) and the optical output arrangement (114) are disposed in the optical path, and the intermediate lens (112) and the scanning mechanism (110) are disposed between the optical input arrangement (108) and the optical output arrangement (114). The scanning mechanism (110) is configured to scan positionally linearly the intermediate lens (112).
A61B 3/10 - Appareils pour l'examen optique des yeuxAppareils pour l'examen clinique des yeux du type à mesure objective, c.-à-d. instruments pour l'examen des yeux indépendamment des perceptions ou des réactions du patient
A61B 3/14 - Dispositions spécialement adaptées à la photographie de l'œil
7.
HANDHELD OPTICAL MEASUREMENT APPARATUS AND METHOD OF ALIGNING A HANDHELD OPTICAL MEASUREMENT APPARATUS
A handheld optical measurement apparatus (100) comprises an optical measurement system (200, 201) comprising an optical reception path (202), a display device (116), and a housing (101) comprising a longitudinal measurement axis (113) and the optical measurement system (200, 201), the optical reception path (202) being coaxial with the longitudinal measurement axis (113). An alignment system is also provided comprising an extended light source (110) configured as a predetermined shape and mounted on the housing (101) and disposed off-axis with respect to the longitudinal measurement axis (113), the extended light source being configured to illuminate a reflective target. An optical sensor device (112) is mounted on the housing (101) off-axis relative to the longitudinal measurement axis (113) and configured to receive light reflected by the reflective target and to capture an image comprising the light. A processing resource (208, 210, 212, 214, 216) is operably coupled to the optical sensor device (112) and the display device (116). The processing resource is configured to display on the display device (116) the image captured by the optical sensor device (112) and substantially contemporaneously display an alignment reference (220) on the display device (116), the alignment reference (220) being fixed in position and size, and providing, when in use, a reference to facilitate manual alignment of the optical measurement system (200, 201) with the reflective target. The processing resource is also configured to assess alignment of the optical measurement system (200, 201) with respect to fidelity of shape and centrality of the reflected light in the image captured by the optical sensor device (112).
A61B 3/103 - Appareils pour l'examen optique des yeuxAppareils pour l'examen clinique des yeux du type à mesure objective, c.-à-d. instruments pour l'examen des yeux indépendamment des perceptions ou des réactions du patient pour la détermination de la réfraction, p. ex. réfractomètres, skiascopes
A61B 3/00 - Appareils pour l'examen optique des yeuxAppareils pour l'examen clinique des yeux
A61B 3/113 - Appareils pour l'examen optique des yeuxAppareils pour l'examen clinique des yeux du type à mesure objective, c.-à-d. instruments pour l'examen des yeux indépendamment des perceptions ou des réactions du patient pour déterminer ou enregistrer le mouvement de l'œil
A61B 3/10 - Appareils pour l'examen optique des yeuxAppareils pour l'examen clinique des yeux du type à mesure objective, c.-à-d. instruments pour l'examen des yeux indépendamment des perceptions ou des réactions du patient
A61B 3/14 - Dispositions spécialement adaptées à la photographie de l'œil
A61B 3/12 - Appareils pour l'examen optique des yeuxAppareils pour l'examen clinique des yeux du type à mesure objective, c.-à-d. instruments pour l'examen des yeux indépendamment des perceptions ou des réactions du patient pour examiner le fond de l'œil, p. ex. ophtalmoscopes
8.
OPTICAL MEASUREMENT APPARATUS AND METHOD OF MEASURING AN AXIAL LENGTH
An optical measurement apparatus (100) combines confocal measurement and low coherence interferometric measurement. The apparatus (100) comprises an interferometric measurement subsystem (102) and a confocal measurement subsystem (104) disposed within a housing (101). An optical combiner (136) is configured to provide the interferometric measurement subsystem (102) and the confocal measurement subsystem (104) with irradiative access to a region to be measured located at a substantially static target location. The interferometric measurement subsystem (102) and the confocal measurement subsystem (104) are respectively configured to image longitudinally in respect of a first subregion (162) and a second subregion (164) in the region to be measured, the second subregion (164) being axially spaced from the first subregion (162). A processing resource (152, 154) is operably coupled to the interferometric measurement subsystem (102) and the confocal measurement subsystem (104), and configured to calculate a first range in respect of the first subregion (162) and a second range in respect of the second subregion (164).
G01B 11/14 - Dispositions pour la mesure caractérisées par l'utilisation de techniques optiques pour mesurer la distance ou la marge entre des objets ou des ouvertures espacés
9.
OPTICAL MEASUREMENT APPARATUS AND METHOD OF SCANNING A FOCUS
An optical measurement apparatus (100) comprises a point source (102) of electromagnetic radiation and an optical path extending from the point source of electromagnetic radiation to a window (122). An optical input arrangement (108) is also provided and comprises a static input lens. An optical output arrangement (114) of the apparatus comprises a static output lens. The apparatus further comprises an intermediate lens (112) and a scanning mechanism (110) configured to carry the intermediate lens (112). A position measurement system is operably coupled to the scanning mechanism (110) and configured to measure a position of the intermediate lens (112). The optical input arrangement (108), the intermediate lens (112) and the optical output arrangement (114) are disposed in the optical path, and the intermediate lens (112) and the scanning mechanism (110) are disposed between the optical input arrangement (108) and the optical output arrangement (114). The scanning mechanism (110) is configured to scan positionally linearly the intermediate lens (112).
G01B 11/06 - Dispositions pour la mesure caractérisées par l'utilisation de techniques optiques pour mesurer la longueur, la largeur ou l'épaisseur pour mesurer l'épaisseur
10.
OPTICAL MEASUREMENT APPARATUS AND METHOD OF RAPID MEASUREMENT
An optical measurement apparatus (100) combines confocal measurement and low coherence interferometric measurement. The apparatus (100) comprises a confocal measurement subsystem (102) and an interferometric measurement subsystem (104) disposed within a housing (138). An optical combiner (126) is configured to provide the confocal measurement subsystem (102) and the interferometric measurement subsystem (104) with irradiative access to a region to be measured (134) located at a substantially static target location. An optical path internal to the housing (138) extends from the optical combiner (126) towards the region to be measured (134), and the internal optical path is common to the confocal measurement subsystem (102) and the interferometric measurement subsystem (104). The confocal measurement subsystem (102) and the interferometric measurement subsystem (104) are configured to image longitudinally, and a length of the internal optical path is fixed.
G01B 11/06 - Dispositions pour la mesure caractérisées par l'utilisation de techniques optiques pour mesurer la longueur, la largeur ou l'épaisseur pour mesurer l'épaisseur
G01N 21/45 - RéfringencePropriétés liées à la phase, p. ex. longueur du chemin optique en utilisant des méthodes interférométriquesRéfringencePropriétés liées à la phase, p. ex. longueur du chemin optique en utilisant les méthodes de Schlieren
11.
OPTICAL MEASUREMENT APPARATUS AND METHOD OF RAPID MEASUREMENT
An optical measurement apparatus (100) combining confocal measurement and low-coherence interferometric measurement comprising: a Fourier domain interferometric measurement subsystem (104) comprising a spectrometer (110) operably coupled to a reference arm (136), a measurement arm (138) and a source of electromagnetic radiation (106) via an optical coupler (108), the spectrometer (110) comprising a spectral signal generator (146) responsive to received reflected electromagnetic radiation. A confocal measurement subsystem (102) is also provided comprising an optical scanner (120) having a predetermined scan range for longitudinally scanning, when in use, a beam along a region (128) to be measured. A processing resource (142, 144) is operably coupled to the Fourier domain interferometric measurement subsystem (104) and the confocal measurement subsystem (102) and the confocal measurement subsystem (102) shares the measurement arm (138) with the Fourier domain interferometric measurement subsystem (104), the shared measurement arm (138) comprising the optical scanner (120) of the confocal measurement subsystem (102). The reference arm (136) comprises a reference optical reflector element (130, 132, 134), and the processing resource (142, 144) is configured to provide an accumulator (148) operably coupled to the spectral signal generator (146).
G01B 11/06 - Dispositions pour la mesure caractérisées par l'utilisation de techniques optiques pour mesurer la longueur, la largeur ou l'épaisseur pour mesurer l'épaisseur
G01N 21/45 - RéfringencePropriétés liées à la phase, p. ex. longueur du chemin optique en utilisant des méthodes interférométriquesRéfringencePropriétés liées à la phase, p. ex. longueur du chemin optique en utilisant les méthodes de Schlieren
12.
LINEAR RESONANCE SCANNING APPARATUS AND METHOD OF SCANNING
A linear resonance scanning apparatus (100) comprises an electromagnetic drive unit (132) comprising a coil (140) wound about a core (138), the electromagnetic drive unit (132) having a field output end (134). A linear motion bearing assembly (106) is configured to carry a permanent magnet (130), the linear motion bearing assembly (106) having a longitudinal axis of reciprocating motion. A biasing element (122, 126) is disposed adjacent an end of the linear motion bearing assembly (106) to serve as a buffer for motion along the longitudinal axis of reciprocating motion. The permanent magnet (130) has a surface located opposite the field output end (134) of the electromagnetic drive unit (132) in spaced relation to the field output end (134) of the electromagnetic drive unit (132). The permanent magnet (130) is laterally offset with respect to the core (138) so that the core (138) substantially does not overlie the permanent magnet (130) when at rest.
H02K 33/02 - Moteurs avec un aimant, un induit ou un système de bobines à mouvement alternatif, oscillant ou vibrant avec des induits entraînés dans un sens par application d'énergie à un système à une seule bobine et ramenés par une force d'origine mécanique, p. ex. par des ressorts
H02K 33/16 - Moteurs avec un aimant, un induit ou un système de bobines à mouvement alternatif, oscillant ou vibrant avec des induits polarisés se déplaçant dans des directions opposées par inversion de la tension appliquée au système à une seule bobine
H02P 6/00 - Dispositions pour commander les moteurs synchrones ou les autres moteurs dynamo-électriques utilisant des commutateurs électroniques en fonction de la position du rotorCommutateurs électroniques à cet effet
H02P 25/032 - Moteurs à mouvement alternatif, oscillant ou vibrant
Optometric instruments, devices and apparatus, namely, pachymeters, Pupillometers and Keratometers; Optometric instruments, devices and apparatus for measuring parameters within the eye; Optometric instruments, devices and apparatus for scanning, screening, diagnosing and monitoring medical conditions and diseases of the eye; Diagnostic apparatus for medical purposes for testing eye conditions; Diagnostic measuring apparatus for medical use for testing eye conditions; Eye testing apparatus; Optometric instruments, namely, instruments for locating grooves, engravings and other indicia on ophthalmic lenses; Optomedical examination instruments for medical examination of the eyes; Optical temperature measuring instruments for medical inspection purposes; Optical measuring instruments for medical inspection purposes; Optical measuring instruments for screening, testing, diagnosing and monitoring medical conditions and diseases of the eye; medical, apparatus and instruments for use in optometric treatment; structural parts and fittings for the aforesaid goods
Medical diagnostic instruments; Diagnostic apparatus for medical purposes; Diagnostic measuring apparatus for medical use; Eye testing apparatus; Optometric instruments; Optomedical examination instruments; Optical temperature measuring instruments for medical inspection purposes; Optical measuring instruments for medical inspection purposes; Optical measuring instruments for screening, testing, diagnosing and monitoring medical conditions and diseases; Pachymeters; medical, apparatus and instruments; parts and fittings for the aforesaid goods.
Optometric instruments, devices and apparatus, namely, pachymeters, Pupillometers and Keratometers; Optometric instruments, devices and apparatus for measuring parameters within the eye; Optometric instruments, devices and apparatus for scanning, screening, diagnosing and monitoring medical conditions and diseases; Medical diagnostic apparatus for measuring glucose levels within the body; Medical diagnostic apparatus for testing for diabetes, dementia, Alzheimer's Disease, hyperlipidemia, retinopathy, cataracts, sepsis, retinal flow and retinal biomarkers; Eye testing apparatus; Optometric instruments, namely, instruments for measuring the diameter of ophthalmic lenses; Optomedical examination instruments, namely, intraocular lens biometers, axiometers, tonometers, corneal topographers, keratometers, pupilometers, retinoscopes; Optical temperature measuring instruments for medical inspection purposes; Optical instruments for measuring corneal curvature, corneal thickness, anterior chamber depth, lens thickness, axial length, pupil diameter, white-to-white corneal diameter, ocular refractive power for medical inspection purposes; Optical measuring instruments for screening, testing, diagnosing and monitoring medical conditions and diseases; medical apparatus and instruments for use in endocrinology, cardio-vascular and neurology procedures; parts and fittings for the aforesaid goods
Optometric instruments, devices and apparatus, namely, pachymeters, Pupillometers and Keratometers; Optometric instruments, devices and apparatus for measuring parameters within the eye; Optometric instruments, devices and apparatus for scanning, screening, diagnosing and monitoring medical conditions and diseases; Medical diagnostic apparatus for measuring glucose levels within the body; Medical diagnostic apparatus for testing for diabetes, dementia, Alzheimer's Disease, hyperlipidemia, retinopathy, cataracts, sepsis, retinal flow and retinal biomarkers; Eye testing apparatus; Optometric instruments, namely, instruments for measuring the diameter of ophthalmic lenses; Optomedical examination instruments, namely, intraocular lens biometers, axiometers, tonometers, corneal topographers, keratometers, pupilometers, retinoscopes; Optical temperature measuring instruments for medical inspection purposes; Optical instruments for measuring corneal curvature, corneal thickness, anterior chamber depth, lens thickness, axial length, pupil diameter, white-to-white corneal diameter, ocular refractive power for medical inspection purposes; Optical measuring instruments for screening, testing, diagnosing and monitoring medical conditions and diseases; medical apparatus and instruments for use in endocrinology, cardio-vascular and neurology procedures; parts and fittings for the aforesaid goods
09 - Appareils et instruments scientifiques et électriques
10 - Appareils et instruments médicaux
Produits et services
Scientific, optical, measuring, detecting, testing, inspecting, apparatus and instruments; parts and fittings for the aforesaid goods. Optical scanners for medical inspection purposes; Medical diagnostic instruments; Diagnostic apparatus for medical purposes; Diagnostic measuring apparatus for medical use; Eye testing apparatus; Optometric instruments; Optomedical examination instruments; Optical temperature measuring instruments for medical inspection purposes; Optical measuring instruments for medical inspection purposes; Optical measuring instruments for screening, testing, diagnosing and monitoring medical conditions and diseases; medical, apparatus and instruments; parts and fittings for the aforesaid goods.
09 - Appareils et instruments scientifiques et électriques
10 - Appareils et instruments médicaux
Produits et services
Scientific, optical, measuring, detecting, testing, inspecting, apparatus and instruments; parts and fittings for the aforesaid goods. Optical scanners for medical inspection purposes; Medical diagnostic instruments; Diagnostic apparatus for medical purposes; Diagnostic measuring apparatus for medical use; Eye testing apparatus; Optometric instruments; Optomedical examination instruments; Optical temperature measuring instruments for medical inspection purposes; Optical measuring instruments for medical inspection purposes; Optical measuring instruments for screening, testing, diagnosing and monitoring medical conditions and diseases; medical, apparatus and instruments; parts and fittings for the aforesaid goods.
19.
Optical measurement apparatus and method of manufacturing the same
An optical measurement apparatus (102) containing a bidirectional optical transceiver component (200), the bidirectonal optical transceiver component (200) comprising a source of optical electromagnetic radiation (208), an optical detector (214), a beamsplitter, and a combined input and output port (218). The port (218) is arranged to permit, when in use, propagation of optical electromagnetic radiation therethrough. The beamsplitter is aligned within a housing (206) with respect to the optical source (208), the optical detector (214) and the port (218) in order to direct optical electromagnetic radiation emitted by the optical source (214) to the port (214) and to direct optical electromagnetic radiation received from the port (214) to the optical detector (208).
A measurement apparatus comprises a probe system (100) operably coupled, when in use, to a processing resource (134). The probe system (100) and the processing resource (134) are arranged, when in use, to measure an apparent thickness change of a volume of the medium (108) to be measured and to determine a physiological parameter using the measurement of the apparent thickness change.
A61B 5/00 - Mesure servant à établir un diagnostic Identification des individus
A61B 5/1455 - Mesure des caractéristiques du sang in vivo, p. ex. de la concentration des gaz dans le sang ou de la valeur du pH du sang en utilisant des capteurs optiques, p. ex. des oxymètres à photométrie spectrale
A61B 3/10 - Appareils pour l'examen optique des yeuxAppareils pour l'examen clinique des yeux du type à mesure objective, c.-à-d. instruments pour l'examen des yeux indépendamment des perceptions ou des réactions du patient
A61B 5/145 - Mesure des caractéristiques du sang in vivo, p. ex. de la concentration des gaz dans le sang ou de la valeur du pH du sang
21.
Signal sample trigger apparatus, data acquisition system and method of sampling an analogue signal
A signal sample trigger apparatus (206) comprises an input (302, 304), a processing resource (300, 500) coupled to the input (302, 304), and an output (306) coupled to the processing resource (300, 500). The processing resource (300, 500) is arranged to generate, when in use, a trigger signal (400, 600) in response to location increment information. The location increment information (402, 404, 602, 604) is received via the input (302, 304), and the trigger signal (400, 600) is provided via the output for triggering execution of a sample of an analogue signal.
An optical measurement apparatus comprises an optical system (100) having a receiving axis (115). The optical system (100) comprises a source (102) that generates a probe beam that is directed to a location to be measured (114). A detector (112) of the optical system receives a reflected beam from the location to be measured (114). The apparatus also comprises a processing resource that receives an output signal from the detector (112) and makes an assessment of a characteristic of the output signal in order to determine a degree of alignment of the location to be measured (114) with the receiving axis (115) of the optical system (100).
A61B 3/10 - Appareils pour l'examen optique des yeuxAppareils pour l'examen clinique des yeux du type à mesure objective, c.-à-d. instruments pour l'examen des yeux indépendamment des perceptions ou des réactions du patient
A61B 3/02 - Appareils pour l'examen optique des yeuxAppareils pour l'examen clinique des yeux du type à mesure subjective, c.-à-d. appareils de d’examen nécessitant la participation active du patient
G01B 11/26 - Dispositions pour la mesure caractérisées par l'utilisation de techniques optiques pour mesurer des angles ou des cônesDispositions pour la mesure caractérisées par l'utilisation de techniques optiques pour tester l'alignement des axes
An optical measurement apparatus comprises an optical system. The optical system comprises a source and an image capture device. The source is arranged to generate, when in use, a beam of electromagnetic radiation. Further, the optical system is arranged to direct the beam of electromagnetic radiation to a location to be measured. The optical measurement apparatus also comprises a feedback arrangement arranged to receive a reflected beam from the location to be measured and to provide feedback information in response to receipt of the reflected beam, the feedback information being indicative of degree of alignment of the location to be measured with the optical system.
A61B 3/14 - Dispositions spécialement adaptées à la photographie de l'œil
A61B 3/10 - Appareils pour l'examen optique des yeuxAppareils pour l'examen clinique des yeux du type à mesure objective, c.-à-d. instruments pour l'examen des yeux indépendamment des perceptions ou des réactions du patient
24.
Ocular property measuring apparatus and method therefor
A method and apparatus for measuring an apparent depth (1) of a section of an eye (30) are disclosed. Light is focused to a measurement location (15) proximate or within the eye. The measurement location is scanned through the section and upon passing through first and second refractive index interfaces defining the section, a respective reflected light signal is detected, from which apparent positions of the first and second interfaces may be derived. Preferably, a confocal scanning arrangement is employed. Preferably, the section is the aqueous humor (34) of the eye (30). From changes in its refractive index (n) corresponding changes in glucose concentration in the aqueous humor and, in turn, in the bloodstream of a patient may be derived, offering a non-invasive monitoring means for diabetic patients. The apparatus may be a hand-held device, employing microelectromechanical systems. The radius of curvature (R) of a curved section, such as a cornea (32) or ocular lens (36), may also be measured to determine refractive errors of the eye.
