A Method and System for Coherent Beam Combination A method of coherent beam combination of a tiled laser array, the method including directing a combined beam derived from multiple optical outputs at a target and using a light sensor to capture an optical intensity value of a reflected return from the target. Carrying out first optimisation process that comprises altering the phases of the optical outputs through different sets of phase relationships and capturing an intensity value of the reflected return from the target after applying each alteration so as to produce a set of intensity values. Using the set of intensity values acts as an input to a machine learning model to determine a compensatory phase adjustment for the optical outputs to increase coherence of the combined beam at the target.
H01S 3/10 - Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating
H01S 3/13 - Stabilisation of laser output parameters, e.g. frequency or amplitude
H01S 3/23 - Arrangement of two or more lasers not provided for in groups , e.g. tandem arrangement of separate active media
A decoy for protecting a platform against radar based threats; the decoy comprising a case housing a signal generate means configured to generate an RF decoy signal and two antennas to transmit the RF decoy signal in two different directions. A separate amplifier is associated with each antenna to amplify the RF decoy signal before transmission by the respective antenna. A first heat sink is in contact with the first amplifier to dissipate heat away from the first amplifier, and a second heat sink is in contact with the second amplifier to dissipate heat away from the second amplifier, wherein the masses of the first heat sink and second heat sink differ.
A method of deploying, from a platform into the air, an untethered decoy for protecting the platform against radar based threats. The method comprising launching the untethered decoy backwards from the platform. The decoy configured to generate a decoy signal through the antenna.
B64D 1/02 - Dropping, ejecting, or releasing articles
F41H 11/32 - Decoy or sacrificial vehiclesDecoy or sacrificial devices attachable to vehicles
F42B 12/70 - Projectiles, missiles or mines characterised by the warhead, the intended effect, or the material characterised by the warhead or the intended effect for dispensing materialsProjectiles, missiles or mines characterised by the warhead, the intended effect, or the material characterised by the warhead or the intended effect for producing chemical or physical reactionProjectiles, missiles or mines characterised by the warhead, the intended effect, or the material characterised by the warhead or the intended effect for signalling for dispensing discrete solid bodies for dispensing radar chaff or infrared material
A decoy for protecting a platform against threats. The decoy comprising a casing housing electronics for generating a RF decoy signal. The decoy having stabilising fins mounted to the casing and configured for rotation relative to the casing about a first axis, between a stowed configuration in which the fins lie alongside the casing and deployed configuration in which they extend laterally away from the casing. The decoy comprises a deployment mechanism associated with each fin comprising a first bias means configured to rotate the fin about the first axis and a second bias means configured to urge the fin into a locked position through a translation movement along the first axis. It also includes a retaining mechanism comprising a first surface provided by the fin and second surface provided by the casing, the first and second surfaces being oblique to the first axis and configured to engage one another to inhibit movement of the fin about the first axis when the fin is in the deployed configuration.
An EMC fluid filter including: a filter medium having a filter structure, the filter structure permitting the flow of a fluid from a first side of the filter structure to a second side of the filter structure; a non-filter medium connected to the filter medium; and wherein the filter medium and the non-filter medium are formed together from one or more materials as a seamless unitary component.
An RF decoy for protecting an aerial platform. The decoy comprising a first multi-arm planar antenna and a second multi-arm planar antenna. The first antenna located at a first end of the RF decoy to radiate into a first hemisphere extending beyond the first end of the RF decoy, and the second antenna located at the second end of the decoy to radiate into a second hemisphere extending beyond the second end of the RF decoy. The RF decoy comprising an RF feed system adapted to drive each antenna in a second order mode or higher order mode such that the beam peak of each antenna is off-boresight. When operated such that both antennas are either transmitting or receiving at the same time, this positioning of the antennas, in combination with each being driven in a second or higher order mode, provides for substantially omnidirectional coverage around the decoy except along the antenna's respective nominal boresights.
A spiral antenna comprising multiple conductive spiral arms formed on a multi-faceted substrate. The multiple arms trace a path that transitions from a circular spiral, e.g. a logarithmic or Archimedean spiral, to an elliptical spiral.
An aircraft (10) including a fuselage (100) having first (110) and second sides (120); a first rotor (20) positioned at the first side of the aircraft and including a plurality of blades (22), the first rotor being moveable between a first position in which the first rotor provides thrust in a generally vertical direction and a second position in which the first rotor provides thrust in a generally horizontal direction; a second rotor (30) positioned at the second side of the aircraft and including a plurality of blades (32), the second rotor being moveable between a first position in which the second rotor provides thrust in a generally vertical direction and a second position in which the second rotor provides thrust in a generally horizontal direction; wherein the first rotor (20) includes a first rotor plane (200) positioned generally perpendicular to an axis of rotation (26) of the first rotor (20), said first rotor plane being coincident with a portion of a blade (22) of the first rotor; wherein the second rotor (30) includes a second rotor plane (300) positioned generally perpendicular to an axis of rotation (36) of the second rotor (30), said second rotor plane being coincident with a portion of a blade (32) of the second rotor (30); and wherein, when the first and second rotors are in their respective first positions, the first and second rotor planes are non-parallel, such that the first rotor plane does not intersect a portion of any of the blades of the second rotor and such that the second rotor plane does not intersect a portion of any of the blades of the first rotor.
B64C 29/00 - Aircraft capable of landing or taking-off vertically, e.g. vertical take-off and landing [VTOL] aircraft
B64C 27/28 - Compound rotorcraft, i.e. aircraft using in flight the features of both aeroplane and rotorcraft with forward-propulsion propellers pivotable to act as lifting rotors
An Optical Amplifier System High power fibre amplifier systems require means to avoid inadvertent generation of Stimulated Brillion Scattering (SBS) that cause optical losses and, if large enough, may damage the system. The standard active technique used to supress SBS is to modulate the seed beam with a radio frequency line width broadening signal, e.g. white noise, to increase the spectral linewidth of the seed beam. This significantly increases the threshold power at which SBS becomes a problem by significantly reducing the coherence length. The problem accompanying a reduced coherence length is that the tolerance in variations in optical path length reduces markedly. The solution provided to this problem is to delay the line width broadening signal by predetermined amount to compensate for the difference in optical path lengths.
H04B 10/291 - Repeaters in which processing or amplification is carried out without conversion of the main signal from optical form
H04B 10/2537 - Arrangements specific to fibre transmission for the reduction or elimination of distortion or dispersion due to scattering processes, e.g. Raman or Brillouin scattering
H01S 3/094 - Processes or apparatus for excitation, e.g. pumping using optical pumping by coherent light
09 - Scientific and electric apparatus and instruments
12 - Land, air and water vehicles; parts of land vehicles
25 - Clothing; footwear; headgear
28 - Games; toys; sports equipment
Goods & Services
Electrical and electronic equipment and instruments for
aircraft and helicopters, namely, flight control system,
beacon control panel, anemometer, helicopter pilot control
panel, fuel control panel, engine control panel, gyro
compass control panel, electronic flight display, engine and
crew warning system, aircraft engine and flight system
monitors; flight simulator; avionics sensor systems, namely,
navigation systems for use in aircraft and helicopters;
communication transmission apparatus, namely, antennas,
wireless transmitters and receivers for use on aircraft and
helicopters; aircraft and helicopter testing apparatus and
instruments, namely, general caution indicator (master
caution) and general warning indicator (master warning) for
use on aircraft and helicopters; computer hardware for use
in aircraft and helicopters; computer software for flight
command and control and navigation for use on aircraft and
helicopters; electronic publications, namely, electronic
books, magazines, brochures, electronic magazines (e-zines),
manuals in the aviation sector and helicopter, downloadable
or recorded on magnetic, optical and electronic media; smart
watches. Aircraft; helicopters. Clothing; shirts; trousers; pants; sweaters; scarves; flight
jackets; wind jackets; rainwear; footwear; headgear; hats;
caps. Toys; scale model aircraft; scale model helicopter; toy
construction block kits; toy aircraft construction block
kits; toy helicopters construction block kits; scale model
airports; pilot toys; aviator toys; helicopter pilot toys;
puzzles; aircraft puzzles; helicopter puzzles;
radio-controlled toy aircraft; radio-controlled toy
helicopters; games; board games; strategy games; rescue
games; card games; aircraft games; helicopter games;
electronic games; video game apparatus; video game consoles;
consoles for playing video games in the field of aircraft;
consoles for playing video games in the field of
helicopters.
09 - Scientific and electric apparatus and instruments
Goods & Services
Expendable active decoys, expendable active decoys against
radio frequency tracking missiles; expendable active decoy
systems, expendable active decoy systems against radio
frequency tracking missiles; countermeasures against
missiles, countermeasures against radio frequency tracking
missiles; countermeasure systems, countermeasure systems
against missiles, countermeasure systems against radio
frequency tracking missiles; digital radio frequency memory
based countermeasures; digital radio frequency memory based
expendable active decoys; digital radio frequency memory
systems, digital radio frequency memory based countermeasure
systems, digital radio frequency memory based expendable
active decoy systems; electronic warfare systems; electronic
warfare countermeasures; electronic attack systems.
09 - Scientific and electric apparatus and instruments
Goods & Services
Multi-function radio frequency systems; electronic warfare
computer systems; electronic surveillance systems; infrared
search and track systems; electro-optical targeting systems;
distributed electro-optical systems; interrogator friend or
foe computer systems; communications systems including
inter-vehicle data links, beyond line of sight, and ultra /
very high frequency systems; countermeasure dispensing
systems; all of the aforesaid systems that work together
within, and/or may be integrated within, a single platform;
all of the aforesaid systems that work together, and/or may
be integrated within, a single platform, and work together
and/or be integrated across more than one platform.
09 - Scientific and electric apparatus and instruments
Goods & Services
Multi-function radio frequency systems; electronic warfare
computer systems; electronic surveillance systems; infrared
search and track systems; electro-optical targeting systems;
distributed electro-optical systems; interrogator friend or
foe computer systems; communications systems including
inter-vehicle data links, beyond line of sight, and ultra /
very high frequency systems; countermeasure dispensing
systems; all of the aforesaid systems that work together
within, and/or may be integrated within, a single platform;
all of the aforesaid systems that work together, and/or may
be integrated within, a single platform, and work together
and/or be integrated across more than one platform.
An Antenna Sinuous and log-periodic antennas are wideband frequency independent antennas which advantageously provide a similar beam width at all frequencies of operation. They can be planar but have improved directivity characteristics when formed over a conical or similar surface. Fabrication of these three-dimensional antenna structures is difficult. Typically, an antenna laminate is wrapped around a frustoconical former. Any alignment error can result in a significant reduction in the high frequency performance of the antenna. Additionally, the wrap around technique is limited to frustoconical and frustopyramidal shaped formers. A solution is achieved through provision of a dielectric sheet formed as a single integral piece that defines a central common region and radially extending arms. The flexible dielectric sheet carries a metallic patterned layer that defines, on each arm, a conductive antenna element each fed by a conductive trace provided by a portion of the metallic pattern layer formed on the common region. Each arm can be bent at its join with the common region to conform with the shape of the former without affecting the alignment between the arms.
An active imaging system including a laser to illuminate a scene and an imaging device to receive returns reflected from the scene. The imaging device including an array of pixel circuits, each pixel circuit including a photodiode connected to multiple track and hold circuits and a timing circuit configured to operate the track and hold circuits in quick succession such that each track and hold circuit captures an information signal indicative of returns arriving during different successive time periods during a gate period and thus provides 3D image data based on the arrival times of returns from the scene during the gate period.
The system includes first and second laser illuminators to illuminate a scene, including a target. The pulses of light emitted from the first laser illuminator having a relatively broad spectral linewidth and a relatively long pulse duration compared with pulses of light from the second laser illuminator. A camera system uses a relatively long gate period for receiving returns from the first laser illuminator to obtain a first image of the scene and to use a relatively short gate period together with ranging information of the target to receive returns from the second laser illuminator to obtain a second image of the target that selectively excludes non-target elements within the scene. The second image is used as a template to selectively remove the non-target elements from the first image.
G01S 17/18 - Systems determining position data of a target for measuring distance only using transmission of interrupted, pulse-modulated waves wherein range gates are used
G01S 17/86 - Combinations of lidar systems with systems other than lidar, radar or sonar, e.g. with direction finders
09 - Scientific and electric apparatus and instruments
Goods & Services
Electronic devices used as expendable active decoys for defence against missiles; electronic devices used as expendable active decoys for defence against radio frequency tracking missiles; expendable active decoy systems being electronic devices for defence against missiles; expendable active decoy systems being electronic devices for defence against radio frequency tracking missiles; countermeasures against missiles being missile defence systems comprised of missile warning systems, radar apparatus, computer hardware, integrated circuits, chips, namely, integrated circuits, printed circuit boards, amplifiers, accelerometers, aerials, antennas, radios, transmitters of electronic signals; countermeasures against radio frequency tracking missiles being missile defence systems comprised of missile warning systems, radar apparatus, computer hardware, integrated circuits, chips, namely, integrated circuits, printed circuit boards, amplifiers, accelerometers, aerials, antennas, radios, transmitters of electronic signals; countermeasure systems being missile defence systems comprised of missile warning systems, radar apparatus, computer hardware, integrated circuits, chips, namely, integrated circuits, printed circuit boards, amplifiers, accelerometers, aerials, antennas, radios, transmitters of electronic signals; countermeasure systems against missiles being missile defence systems comprised of missile warning systems, radar apparatus, computer hardware, integrated circuits, chips, namely, integrated circuits, printed circuit boards, amplifiers, accelerometers, aerials, antennas, radios, transmitters of electronic signals; countermeasure systems against radio frequency tracking missiles being missile defence systems comprised of missile warning systems, radar apparatus, computer hardware, integrated circuits, chips, namely, integrated circuits, printed circuit boards, amplifiers, accelerometers, aerials, antennas, radios, transmitters of electronic signals; electronic device using digital radio frequency memory based countermeasures for defence against missiles; electronic device using digital radio frequency memory based expendable active decoys for defence against missiles; digital radio frequency memory systems comprised of computer hardware, integrated circuits, printed circuit boards, amplifiers, transmitters of electronic signals for defence against missiles; digital radio frequency memory based countermeasure systems comprised of computer hardware, integrated circuits, printed circuit boards, amplifiers, transmitters of electronic signals for defence against missiles; digital radio frequency memory based expendable active decoy systems comprised of computer hardware, integrated circuits, printed circuit boards, amplifiers, transmitters of electronic signals for defence against missiles; electronic warfare systems comprised of radar apparatus, computer hardware, integrated circuits, chips, namely, integrated circuits, printed circuit boards, amplifiers, accelerometers, aerials, antennas, radios, transmitters of electronic signals, for defence against missiles; electronic warfare countermeasures comprised of radar apparatus, computer hardware, integrated circuits, chips, namely, integrated circuits, printed circuit boards, amplifiers, accelerometers, aerials, antennas, radios, transmitters of electronic signals, for defence against missiles; electronic attack systems comprised of radar apparatus, computer hardware, integrated circuits, chips, namely, integrated circuits, printed circuit boards, amplifiers, accelerometers, aerials, antennas, radios, transmitters of electronic signals, for defence against missiles
18.
An Electro-Optical System and a Method of Designing the Same
Many electro-optical systems include an environmental window that shield the sensor and optical train from environmental conditions. Where the electro-optical system is mounted on a high speed platform it can be necessary to shape the window away from the ideal optical shape of a hemisphere to one that is more aerodynamic. The optical train can include corrector elements to correct aberrations resulting from the non-ideal shape of the window. The exterior surface is configured to a specific biconic equation and that specified biconic equation is used to define the surfaces of the corrector element(s) of the optical train. This provides a more uniform wavefront error and magnification across the field of regard.
An optical amplifier system comprising a gain medium and a pump mechanism configured to amplify first and second optical beams as they pass through the gain medium. The optical amplifier system is arranged such that the first and second beams, which have the same wavelength, takes different paths through the gain medium such that the beams are neither parallel nor coaxial when they exit and/or enter through a first side of the gain medium. The system comprises a prism having a facet positioned on the first side of the gain medium that is in the path of both beams. The facet is orientated to cause total internal refection of the one of the beams within the prism but be transmissive to the other. In this way the paths of the two beams can be altered relative to one another allowing the beams to be either brought closer together or separated out. The invention is particularly relevant to multi-pass amplifiers where the first and second beams result from directing a single beam through the gain medium multiple times.
H01S 3/08 - Construction or shape of optical resonators or components thereof
H01S 3/0941 - Processes or apparatus for excitation, e.g. pumping using optical pumping by coherent light of a semiconductor laser, e.g. of a laser diode
H01S 3/042 - Arrangements for thermal management for solid state lasers
H01S 3/06 - Construction or shape of active medium
H01S 3/08 - Construction or shape of optical resonators or components thereof
H01S 3/0941 - Processes or apparatus for excitation, e.g. pumping using optical pumping by coherent light of a semiconductor laser, e.g. of a laser diode
An improved method of simulating radar ground or sea clutter having utility for the testing and designing of radar. The method comprises providing a terrain model comprising discrete flat ground patches each having a reflectivity, area, surface normal vector, and position within a global coordinate frame, calculating triplet values of reflected energy, range and Doppler shift for each discrete patch of the terrain model for a given position and pose of an antenna with known gain and phase characteristics within the global coordinate frame; and for a given radar receiver sample rate and Pulse repetition frequency (PRF), resampling and integrating over all patches through carrying out a 2D transformation using a non-uniform Fast Fourier Transform to derive either: i) energy within each discrete range-Doppler pair bin of a set defined by the PRF and sample rate; and/or ii) receiver signal level at discrete time samples for each pulse. The method corrects the lack of spatial correlation allowing for simulation that is as accurate as using the Iso-range method but with the benefits of the Fixed-Earth method. This significantly increases the speed at which realistic ground clutter modelling can be generated.
G01S 7/41 - Details of systems according to groups , , of systems according to group using analysis of echo signal for target characterisationTarget signatureTarget cross-section
G01S 13/00 - Systems using the reflection or reradiation of radio waves, e.g. radar systemsAnalogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
G01S 13/90 - Radar or analogous systems, specially adapted for specific applications for mapping or imaging using synthetic aperture techniques
G01S 7/41 - Details of systems according to groups , , of systems according to group using analysis of echo signal for target characterisationTarget signatureTarget cross-section
G01S 13/90 - Radar or analogous systems, specially adapted for specific applications for mapping or imaging using synthetic aperture techniques
09 - Scientific and electric apparatus and instruments
12 - Land, air and water vehicles; parts of land vehicles
25 - Clothing; footwear; headgear
28 - Games; toys; sports equipment
Goods & Services
Electrical and electronic equipment and instruments for
aircraft and helicopters, namely, flight control system,
beacon control panel, anemometer, helicopter pilot control
panel, fuel control panel, panel engine control, gyro
compass control panel, electronic flight display, engine and
crew warning system, aircraft engine and flight system
monitors; flight simulator; avionics sensor systems, namely,
navigation systems for use in aircraft and helicopters;
communications transmission apparatus, namely, antennas,
wireless transmitters and receivers for use on aircraft and
helicopters; aircraft and helicopter testing apparatus and
instruments, namely general caution indicator (master
caution) and general warning indicator (master warning) for
use on aircraft and helicopters; computer hardware for use
in aircraft and helicopters; computer software for flight
command and control and navigation for use on aircraft and
helicopters; electronic publications, namely, electronic
books, magazines, brochures, electronic magazines (e-zines),
manuals in the aviation sector and helicopter, downloadable
or recorded on magnetic, optical and electronic media; smart
watches. Aircrafts; helicopters. Clothing; shirts; trousers; pants; sweaters; scarves; flight
jackets; wind jackets; rainwear; footwear; headgear; hats;
caps. Toys; scale model aircraft; scale model helicopter; toy
construction block kits; toy aircraft construction block
kits; toy helicopters construction block kits; scale model
airports; pilot toys; aviator toys; helicopter pilot toys;
puzzles; aircraft puzzles; helicopter puzzles;
radio-controlled toy aircrafts; radio-controlled toy
helicopters; games; board games; strategy games; rescue
games; card games; aircraft games; helicopters games;
electronic games; video game apparatus; video game consoles;
consoles for playing video games in the field of aircrafts;
consoles for playing video games in the field of
helicopters.
24.
Dual band photodiode element and method of making the same
Mercury cadmium telluride (MCT) dual band photodiode elements are described that include an n-type barrier region interposed between first and second p-type regions. The first p-type region is arranged to absorb different IR wavelengths to the second p-type region in order that the photodiode element can sense two IR bands. A portion of the second p-type region is type converted using ion-beam milling to produce a n-type region that interfaces with the second p-type region and the n-type barrier region.
H01L 31/0296 - Inorganic materials including, apart from doping material or other impurities, only AIIBVI compounds, e.g. CdS, ZnS, HgCdTe
H01L 31/101 - Devices sensitive to infrared, visible or ultraviolet radiation
H01L 31/103 - Devices sensitive to infrared, visible or ultraviolet radiation characterised by only one potential barrier or surface barrier the potential barrier being of the PN homojunction type
H01L 31/11 - Devices sensitive to infrared, visible or ultraviolet radiation characterised by two potential barriers or surface barriers, e.g. bipolar phototransistor
25.
System and method for increasing optical power in an RF over fibre link
Improving the signal to noise ratio in an optical link involves either reducing the noise or increasing the RF power coupled into the optical link by lowing the voltage, Vπ, required to induce a phase change of π of the optical beam passing through the optical modulator. The present disclosure relates to methods and architectures for increasing the optical power through a link through providing one or more laser sources, additional modulators or photodiode receivers and dividing the optical power through these components so that none are overloaded.
H04B 10/2575 - Radio-over-fibre, e.g. radio frequency signal modulated onto an optical carrier
H04B 10/80 - Optical aspects relating to the use of optical transmission for specific applications, not provided for in groups , e.g. optical power feeding or optical transmission through water
A radar system includes two circuit boards, a first carries an array of antenna elements and the second carries power circuitry to power the circuitry of the first board. To provide adequate cooling whilst minimising the size of the system the two circuit boards are mounted in a sandwich arrangement on opposite sides of a heat sink. Data and power connections between the two boards are provided by a plurality of electrical cables that extend through apertures in the heat sink.
An active imaging system comprising a laser to illuminate a scene and an imaging device to receive returns reflected from the scene. The imaging device comprising an array of pixel circuits each pixel circuit comprising a photodiode connected to multiple track and hold circuits and a timing circuit adapted to operate the track and hold circuits in quick succession such that each track and hold circuit captures an information signal indicative of returns arriving during different successive time periods during a gate period and thus provides 3D image data based on the arrival times of returns from the scene during the gate period.
An active imaging system comprising a laser to illuminate a scene and an imaging device to receive returns reflected from the scene. The imaging device comprising an array of pixel circuits each pixel circuit comprising a photodiode connected to multiple track and hold circuits and a timing circuit adapted to operate the track and hold circuits in quick succession such that each track and hold circuit captures an information signal indicative of returns arriving during different successive time periods during a gate period and thus provides 3D image data based on the arrival times of returns from the scene during the gate period.
H04N 5/3745 - Addressed sensors, e.g. MOS or CMOS sensors having additional components embedded within a pixel or connected to a group of pixels within a sensor matrix, e.g. memories, A/D converters, pixel amplifiers, shared circuits or shared components
The system comprises first and second laser illuminators to illuminate a scene, including a target. The pulses of light emitted from the first laser illuminator having a relatively broad spectral linewidth and a relatively long pulse duration compared with pulses of light from the second laser illuminator. A camera system uses a relatively long gate period for receiving returns from the first laser illuminator to obtain a first image of the scene and to use a relatively short gate period together with ranging information of the target to receive returns from the second laser illuminator to obtain a second image of the target that selectively excludes non-target elements within the scene. Through image processing, the second image is used as a template to selectively remove the non-target elements from the first image. In this way the final image benefits from the high image quality possible from the returns of the first illuminator and the good clutter rejection from the returns of the second laser illuminator.
G01S 17/18 - Systems determining position data of a target for measuring distance only using transmission of interrupted, pulse-modulated waves wherein range gates are used
G01S 17/42 - Simultaneous measurement of distance and other coordinates
G01S 17/86 - Combinations of lidar systems with systems other than lidar, radar or sonar, e.g. with direction finders
G01S 17/894 - 3D imaging with simultaneous measurement of time-of-flight at a 2D array of receiver pixels, e.g. time-of-flight cameras or flash lidar
H04N 13/10 - Processing, recording or transmission of stereoscopic or multi-view image signals
The system comprises first and second laser illuminators to illuminate a scene, including a target. The pulses of light emitted from the first laser illuminator having a relatively broad spectral linewidth and a relatively long pulse duration compared with pulses of light from the second laser illuminator. A camera system uses a relatively long gate period for receiving returns from the first laser illuminator to obtain a first image of the scene and to use a relatively short gate period together with ranging information of the target to receive returns from the second laser illuminator to obtain a second image of the target that selectively excludes non-target elements within the scene. Through image processing, the second image is used as a template to selectively remove the non-target elements from the first image. In this way the final image benefits from the high image quality possible from the returns of the first illuminator and the good clutter rejection from the returns of the second laser illuminator.
G01S 17/18 - Systems determining position data of a target for measuring distance only using transmission of interrupted, pulse-modulated waves wherein range gates are used
G01S 17/42 - Simultaneous measurement of distance and other coordinates
G01S 17/86 - Combinations of lidar systems with systems other than lidar, radar or sonar, e.g. with direction finders
G01S 17/894 - 3D imaging with simultaneous measurement of time-of-flight at a 2D array of receiver pixels, e.g. time-of-flight cameras or flash lidar
H04N 13/10 - Processing, recording or transmission of stereoscopic or multi-view image signals
31.
AN ELECTRO-OPTICAL SYSTEM AND A METHOD OF DESIGNING THE SAME
Many electro-optical systems include an environmental window that shield the sensor and optical train from environmental conditions. Where the electro-optical system is mounted on a high speed platform it can be necessary to shape the window away from the ideal optical shape of a hemisphere to one that is more aerodynamic. Where so, the optical train will often comprise one or more corrector elements to correct aberrations resulting from the non-ideal shape of the window. The long standing practice has been to fit, as well as possible, a biconic equation to a pre-designed exterior surface geometry of the window and use the fitted biconic equation to define the surfaces of corrector elements of the optical train. In contrast, the process describes designing the exterior surface to a specific biconic equation and then also using that specified biconic equation to define the surfaces of the corrector element(s) of the optical train. This provides a more uniform wavefront error and magnification across the field of regard.
Many electro-optical systems include an environmental window that shield the sensor and optical train from environmental conditions. Where the electro-optical system is mounted on a high speed platform it can be necessary to shape the window away from the ideal optical shape of a hemisphere to one that is more aerodynamic. Where so, the optical train will often comprise one or more corrector elements to correct aberrations resulting from the non-ideal shape of the window. The long standing practice has been to fit, as well as possible, a biconic equation to a pre-designed exterior surface geometry of the window and use the fitted biconic equation to define the surfaces of corrector elements of the optical train. In contrast, the process describes designing the exterior surface to a specific biconic equation and then also using that specified biconic equation to define the surfaces of the corrector element(s) of the optical train. This provides a more uniform wavefront error and magnification across the field of regard.
A gas-liquid separator includes a chamber having an inlet for liquid to enter and at least one outlet for expulsion gas and/or vapour that has separated from the liquid within the chamber under gravity. For some applications the chamber will also have an outlet for the liquid. These systems can rely on the chamber remaining in a static orientation with the gas outlet arranged uppermost. Exemplary embodiments provide the chamber with multiple spaced apart outlets and an ability to sense orientation and/or acceleration of the chamber. A controller uses the output of the sensors to determine the spatial arrangement of the liquid phase and gas phase within the chamber relative to the outlets and selectively opens the multiple outlets to allow one of the liquid phase or gas phase to escape the chamber in preference to the other.
F28D 15/02 - Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls in which the medium condenses and evaporates, e.g. heat-pipes
B64G 1/50 - Arrangements or adaptations of devices for control of environment or living conditions for temperature control
F28D 21/00 - Heat-exchange apparatus not covered by any of the groups
A radar system comprising two circuit boards (3, 4,) a first PCB (3) carries an array of antenna elements and the second PCB (4) carries power circuitry to power the circuitry of the first board. To provide adequate cooling whilst minimising the size of the system the two circuit boards are mounted in a sandwich arrangement on opposite sides of a heat sink (2). Data and power connections between the two boards are provided by a plurality of electrical cables (5) that extend through apertures (2D) in the heat sink. The electrical cables (5) comprise connectors for mating with corresponding connectors of the two boards (3, 4,) and a flexible film substrate carrying a plurality of electrically conductive traces that extend between the two connectors. Slits are formed in the flexible substrate between the traces to make the film more flexible. The greater flexibility provided by the slits together with retaining the connectors in a floating arrangement enables simultaneous blind mating of the connectors of multiple electrical cables with the corresponding connectors on one of the circuit boards.
A Mach Zehnder modulator operates by phase modulating split optical beams with a modulating signal to create dissimilarities in the optical characteristics between the split beams. When the beams are recombined, the dissimilarities gives rise to intensity modulations that are indicative of the modulating signal. One or both beams are modulated with an RF trimming signal. The trimming signal is applied asymmetrically across the two beams thereby reducing the intensity of the optical carrier frequency in one of the beams more than in the other. By selecting the size of the trimming signal the differences in the optical amplitude of the carrier frequency in the two beams can be nulled.
G02F 1/21 - Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulatingNon-linear optics for the control of the intensity, phase, polarisation or colour by interference
G02F 1/225 - Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulatingNon-linear optics for the control of the intensity, phase, polarisation or colour by interference in an optical waveguide structure
A balanced amplifier system having input and output quadrature couplers or equivalents thereof and two amplifiers there between. An RF signal is presented to a first input of an input quadrature coupler such that an amplified RF signal is output at a first output of the output quadrature coupler. A RF control signal is presented to a second input of the quadrature coupler such that an amplified control signal is outputted at the other output of the output quadrature coupler. The system is configured to reflect the amplified signal back into the second port of the output quadrature coupler in order to vary an impedance seen by the amplifiers of the balanced amplifier.
A radar system for air volume surveillance, the radar having a transmitter and receiver with separate antennas. The receiver aperture being relatively large compared with the transmitter aperture such that the receiving beam is narrower than the transmitting beam, which itself is relatively small compared with the volume to be surveyed. Multiple receiving beams can be configured so that collectively they substantially match the angular volume of the transmitting beam; and in which the transmitter is arranged, when operating, to transmit a signal with a duty cycle greater than fifty percent.
The present disclosure relates to manufacture of an active array antenna from a combination of modular sub-arrays, nominally of equal size; each sub-array being associated with a separate receiver and/or transmitter.
A solution to calibrating a modular array is the inclusion of a calibration manifold having multiple 1st ports that connect to respective sub-arrays between their passive network and their respective receiver and/or transmitter.
Each of the first ports communicate with a common second port through which a signal can be introduced in order to be received at each element of each sub array, or through which a signal from any element of any sub-array can be received. This allows any element of the sub array to be calibrated at any time including during operation.
H04B 17/12 - MonitoringTesting of transmitters for calibration of transmit antennas, e.g. of amplitude or phase
H04B 17/21 - MonitoringTesting of receivers for calibrationMonitoringTesting of receivers for correcting measurements
H01Q 3/26 - Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the relative phase or relative amplitude of energisation between two or more active radiating elementsArrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the distribution of energy across a radiating aperture
09 - Scientific and electric apparatus and instruments
12 - Land, air and water vehicles; parts of land vehicles
14 - Precious metals and their alloys; jewelry; time-keeping instruments
25 - Clothing; footwear; headgear
28 - Games; toys; sports equipment
Goods & Services
Electrical and electronic equipment and instruments for
aircraft and helicopters, namely flight control system,
beacon control panel, anemometer, helicopter pilot control
panel, fuel control panel, engine control panel, gyro
compass control panel, electronic flight display, engine and
crew warning system, aircraft engine and flight system
monitors, flight simulator; avionic sensor systems, namely,
navigation systems for use in aircraft and helicopters;
communication transmission apparatus, namely, antennas,
wireless transmitters and receivers for use in aircraft and
helicopters; aircraft and helicopter testing apparatus and
instruments, namely, general caution indicator (master
caution) and general warning indicator (master warning) for
use in aircraft and helicopters; computer hardware for use
in aircraft and helicopters; computer software for command
and control of flight and navigation for use in aircraft and
helicopters; electronic publications, namely electronic
books, magazines, brochures, electronic magazines (e-zines),
manuals in the aviation sector and helicopter, downloadable
or recorded on magnetic, optical and electronic media. Aircrafts; helicopters. Gemstones, pearls, precious stones and precious metals, and
imitations thereof; jewellery boxes; watch boxes; key rings;
pendants; costume jewelry; jewellery; watches and other
chronometric instruments. Clothing; shirts; trousers; pants; sweaters; scarves; flight
jackets; wind jackets, rainwear; footwear; headgear; hats;
caps. Toys; scale model aircraft; scale model helicopter; toy
construction block kits; toy aircraft construction block
kits; toy helicopters construction block kits; scale model
airports; pilot toys; aviator toys; helicopter pilot toys;
puzzles; aircraft puzzles; helicopter puzzles;
radio-controlled toy aircrafts; radio-controlled toy
helicopters; games; board games; strategy games; rescue
games; card games; aircraft games; helicopter games;
electronic games; video game consoles; hand-held consoles
for playing video games in the field of aircrafts; hand-held
consoles for playing video games in the field of
helicopters.
A radar system comprising two circuit boards 3, 4, a first PCB 3 carries an array of antenna elements and the second PCB 4 carries power circuitry to power the circuitry of the first board. To provide adequate cooling whilst minimising the size of the system the two circuit boards are mounted in a sandwich arrangement on opposite sides of a heat sink 2. Data and power connections between the two boards are provided by a plurality of electrical cables 5 that extend through apertures 2D in the heat sink. The electrical cables 5 comprise connectors for mating with corresponding connectors of the two boards 3, 4, and a flexible film substrate carrying a plurality of electrically conductive traces that extend between the two connectors. Slits are formed in the flexible substrate between the traces to make the film more flexible. The greater flexibility provided by the slits together with retaining the connectors in a floating arrangement enables simultaneous blind mating of the connectors of multiple electrical cables with the corresponding connectors on one of the circuit boards.
A laser system having an optical ring resonator, a beam splitter that directs a first beam travelling in a first direction around the ring resonator, out of the resonator towards a reflector that reflects the first beam back into the resonator to travel in an opposite direction around the optical ring resonator that is in the same direction as a second beam travelling around the optical ring resonator; and a beam modifier configured and adapted to modify a spatial distribution of phase across an aperture of the first beam such as to cause it to become more similar or substantially match that of a spatial distribution of phase across an aperture of the second beam.
A laser is disclosed having a housing formed of a block of glass-ceramic. The block is machined (or otherwise formed) to define one or more channels that act as a waveguide in two dimensions for light within the laser resonator. The channels extend between cavities also formed within the block which retain optical components of the laser, e.g. one or more of the gain medium, cavity mirrors, intermediate reflectors etc. The positioning, shape and size of each cavity is bespoke for the optical component it holds in order that each optical component is retained in optical alignment rigidly against the sides of the cavity.
Mercury cadmium telluride (MCT) dual band photodiode elements are described that include an n-type barrier region interposed between first and second p-type regions. The first p-type region is arranged to absorb different IR wavelengths to the second p-type region in order that the photodiode element can sense two IR bands. A portion of the second p-type region is type converted using ion-beam milling to produce a n-type region that interfaces with the second p-type region and the n-type barrier region.
H01L 31/0296 - Inorganic materials including, apart from doping material or other impurities, only AIIBVI compounds, e.g. CdS, ZnS, HgCdTe
H01L 31/101 - Devices sensitive to infrared, visible or ultraviolet radiation
H01L 31/103 - Devices sensitive to infrared, visible or ultraviolet radiation characterised by only one potential barrier or surface barrier the potential barrier being of the PN homojunction type
H01L 31/11 - Devices sensitive to infrared, visible or ultraviolet radiation characterised by two potential barriers or surface barriers, e.g. bipolar phototransistor
44.
Apparatus and method for reducing distortion of an optical signal
An RF signal to be carried by an optical link is modulated onto two optical beams. The modulators are tuned differently so that the distortion products carried on one beam are relatively larger compared to the fundamental compared with other beam. One of the beams is optically upconverted by the appropriate Brillouin shift frequency and the two beams counter-propagated through an optical waveguide in order to create a Brillouin grating. The grating acts to separate the distortion products from the fundamental so as to provide at an output of the link a signal in which the distortion products are insignificant is not absent.
H04B 10/00 - Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
H04B 10/588 - Compensation for non-linear transmitter output in external modulation systems
H04B 10/2537 - Arrangements specific to fibre transmission for the reduction or elimination of distortion or dispersion due to scattering processes, e.g. Raman or Brillouin scattering
A balanced amplifier system (1) having input and output quadrature couplers (2, 3) or equivalents thereof and two amplifiers (4, 5) there between. An RF signal is presented to a first input of an input quadrature coupler (2) such that an amplified RF signal is output at a first output of the output quadrature coupler (3). A RF control signal is presented to a second input of the quadrature coupler (2) such that an amplified control signal is outputted at the other output of the output quadrature coupler (3). The system (1) further comprises means (13) to reflect the amplified signal back into the second port of the output quadrature coupler (3) in order to vary the impedance seen by the amplifiers of the balanced amplifier system (1).
There is described a dielectric polariser for a bicone antenna. The polariser can include radiating vanes that are spaced circumferentially around an aperture of the bicone antenna. The vanes are orientated at 45° to the polarised waves propagated from the antenna in order to circularly polarise the linearly polarised waves. The polariser can be configured for manufacture using a 3D printing process. Surfaces of a central hub of the polariser can be metallised to provide the radiating surfaces of the antenna. This removes the need to use separate antenna elements. Alternative arrangements of 3D printed dielectric polariser are disclosed for use with antenna horns.
H01Q 9/28 - Conical, cylindrical, cage, strip, gauze or like elements having an extended radiating surface Elements comprising two conical surfaces having collinear axes and adjacent apices and fed by two-conductor transmission lines
A laser system comprising an optical ring resonator, the laser system comprising: a beam splitter that directs a first beam travelling in a first direction around the ring resonator, out of the resonator towards a reflector that reflects the first beam back into the resonator so that it now travels in an opposite direction around the optical ring resonator means for redirecting a first beam travelling in a first direction around the optical ring resonator so as to cause the first beam to travel in an opposite direction around the optical ring resonator that is in the same direction as a second beam travelling around the optical ring resonator; and a beam modifier adapted to modify the spatial distribution of phase across the aperture of the first beam such as to cause it to become more similar or substantially match that of the spatial distribution of phase across the aperture of the second beam.
CA 03086275 2020-06-18(12) INTERNATIONAL APPLICATION PUBLISHED UNDER THE PATENT COOPERATION TREATY (PCT)(19) World Intellectual Property 1 11111 1111111 11 111111 111 11111 11111111 1 1 111 1111 1111 1111111111 1111 1111 11111111111 111 1111OrganizationInternational Bureau (10) International Publication Number(43) International Publication Date WO 2019/134968 Al11 July 2019 (11.07.2019) WIPO I PCT(51) International Patent Classification: (81) Designated States (unless otherwise indicated, for everyHO1L 31/0296 (2006.01) HO1L 31/11 (2006.01) kind of national protection available): AE, AG, AL, AM,AO, AT, AU, AZ, BA, BB, BG, BH, BN, BR, BW, BY, BZ,(21) International Application Number:CA, CH, CL, CN, CO, CR, CU, CZ, DE, DJ, DK, DM, DO,PCT/EP2019/050158DZ, EC, EE, EG, ES, FI, GB, GD, GE, GH, GM, GT, HN,(22) International Filing Date: HR, HU, ED, EL, IN, IR, IS, JO, JP, KE, KG, KH, KN, KP,04 Janumy 2019 (04.01.2019) KR, KW, KZ, LA, LC, LK, LR, LS, LU, LY, MA, MD, ME,MG, MK, MN, MW, MX, MY, MZ, NA, NG, NI, NO, NZ,(25) Filing Language: EnglishOM, PA, PE, PG, PH, PL, PT, QA, RO, RS, RU, RW, SA,(26) Publication Language: English SC, SD, SE, SG, SK, SL, SM, ST, SV, SY, TH, TJ, TM, TN,TR, TT, TZ, UA, UG, US, UZ, VC, VN, ZA, ZM, ZW.(30) Priority Data:18002'75.8 08 Janumy 2018 (08.01.2018) GB (84) Designated States (unless otherwise indicated, for everykind of regional protection available): ARIPO (BW, GH,(71) Applicant: LEONARDO MW LIMITED [GB/GB]; GM, KE, LR, LS, MW, MZ, NA, RW, SD, SL, ST, SZ, TZ,Christopher Martin Road, Basildon Essex SS14 3EL (GB).UG, ZM, ZW), Eurasian (AM, AZ, BY, KG, KZ, RU, TJ,(72) Inventors: HIPWOOD, Les; Leonarod MW Ltd Christo- TM), European (AL, AT, BE, BG, CH, CY, CZ, DE, DK,pher Martin Road, Basildon Essex S S14 3EL (GB). BAINS, EE, ES, FI, FR, GB, GR, HR, HU, EE, IS, IT, LT, LU, LV,Sudesh; Leonarod MW Ltd Christopher Martin Road, MC, MK, MT, NL, NO, PL, PT, RO, RS, SE, SI, SK, SM,Basildon Essex SS14 3EL (GB). TR), OAPI (BF, BJ, CF, CG, CI, CM, GA, GN, GQ, GW,KM, ML, MR, NE, SN, TD, TG).- (74) Agent: TOLFREE, Adam; Impetus IP Limited Suite,31,West Devon Business Park, Tavistock Devon PL 19 9DPPublished:(GB).¨ with international search report (Art. 21(3))- (54) Title: A DUAL BAND PHOTODIODE ELEMENT AND METHOD OF MAKING THE SAMEFigure 5111 101A 112 108 101106 ________________________________ 107 ,õ 110-1051091041-1103Gie=Nrere)(57) Abstract: An Mercury cadmium telluride (MCT) dual band photodiode elements is described that comprises a n-type barrierregion intemosed between a first and second p-type regions, the first p-type region is arranged to absorb different 1R wavelengths to ele the second p-type region in order that the photodiode element can sense two 1R bands. A portion of the second p-type region is type õ.õ,, converted using ion-beam milling to produce a n-type region that interfaces with the second p-type region and the n-type barrier region.
H01L 31/0296 - Inorganic materials including, apart from doping material or other impurities, only AIIBVI compounds, e.g. CdS, ZnS, HgCdTe
H01L 31/11 - Devices sensitive to infrared, visible or ultraviolet radiation characterised by two potential barriers or surface barriers, e.g. bipolar phototransistor
09 - Scientific and electric apparatus and instruments
Goods & Services
Apparatus and instruments for the retrieval, storage, input,
processing, display and transmission of data all for the
purpose of detecting and monitoring the presence of unmanned
aircraft systems (UAS), unmanned ground vehicles (UGV),
unmanned surface vehicles (USV) and unmanned underwater
vehicles (UUV); computer software and computer hardware all
for the purpose of detecting and monitoring the presence of
unmanned aircraft systems (UAS), unmanned ground vehicles
(UGV), unmanned surface vehicles (USV) and unmanned
underwater vehicles (UUV); downloadable software for the
purpose of detecting and monitoring the presence of unmanned
aircraft systems (UAS), unmanned ground vehicles (UGV),
unmanned surface vehicles (USV) and unmanned underwater
vehicles (UUV); software for the detection of electronic and
radio signals for the remote control of electronic devices;
software for monitoring the presence of unmanned aircraft
systems (UAS), unmanned ground vehicles (UGV), unmanned
surface vehicles (USV) and unmanned underwater vehicles
(UUV); apparatus for the detection of electronic and radio
signals for the remote control of electronic devices;
apparatus for the detection of unmanned aircraft systems
(UAS), unmanned ground vehicles (UGV), unmanned surface
vehicles (USV) and unmanned underwater vehicles (UUV);
sensors and transceivers; sensors and transceivers for
monitoring the presence of unmanned aircraft systems (UAS),
unmanned ground vehicles (UGV), unmanned surface vehicles
(USV) and unmanned underwater vehicles (UUV);
telecommunication hardware; telecommunication cameras and
display devices; radio frequency (RF) and global positioning
system (GPS) hardware for monitoring and jamming the radio
and GPS signals of unmanned aircraft systems (UAS), unmanned
ground vehicles (UGV), unmanned surface vehicles (USV) and
unmanned underwater vehicles (UUV); radar apparatus; radar
apparatus for monitoring the presence of unmanned aircraft
systems (UAS), unmanned ground vehicles (UGV), unmanned
surface vehicles (USV) and unmanned underwater vehicles
(UUV); radar jamming apparatus; any of the above in the form
of a hand-held mobile unit; parts and fittings for all the
aforesaid goods.
The laser has a housing comprised from a block of glass-ceramic. The block is machined (or otherwise formed) to define one or more channels that act as a waveguide in two dimensions for light within the laser resonator. The channels extend between cavities also formed within the block which retain optical components of the laser, e.g. one or more of the gain medium, cavity mirrors, intermediate reflectors etc. The positioning, shape and size of each cavity is bespoke for the optical component it holds in order that each optical component is retained in optical alignment rigidly against the sides of the cavity.
09 - Scientific and electric apparatus and instruments
Goods & Services
Apparatus and instruments, namely, transceivers, electro-magnetic sensors comprising electro-optical sensors, radio receivers and radar apparatus for the collection, retrieval, storage, processing, display and transmission of data all for the purpose of detecting and monitoring the presence of unmanned aircraft systems (UAS), unmanned ground vehicles (UGV), unmanned surface vehicles (USV), and unmanned underwater vehicles (UUV); computer hardware for the processing of electro-magnetic sensor data all for the purpose of detecting and monitoring the presence of unmanned aircraft systems (UAS), unmanned ground vehicles (UGV), unmanned surface vehicles (USV), and unmanned underwater vehicles (UUV); recorded software embedded in the electro-magnetic sensors' computer hardware for the processing of electro-magnetic sensor data for the purpose of detecting and monitoring the presence of unmanned aircraft systems (UAS), unmanned ground vehicles (UGV), unmanned surface vehicles (USV), and unmanned underwater vehicles (UUV); electronic and radio signal detectors for the remote control of electronic devices; transceivers; proximity sensors and transceivers for monitoring the presence of unmanned aircraft systems (UAS), unmanned ground vehicles (UGV), unmanned surface vehicles (USV), and unmanned underwater vehicles (UUV); telecommunication computer peripheral hardware, namely, human machine interface devices in the form of computer keyboard, keypads, mouse, rollerballs, joysticks, controllers, and display monitors for the command and control of and the display of data from electro-magnetic sensor data all for the purpose of detecting and monitoring the presence of unmanned aircraft systems (UAS), unmanned ground vehicles (UGV), unmanned surface vehicles (USV), and unmanned underwater vehicles (UUV); radio frequency (RF) transceivers and global positioning system (GPS) computer hardware for monitoring and jamming the radio and GPS signals of unmanned aircraft systems (UAS), unmanned ground vehicles (UGV), unmanned surface vehicles (USV), and unmanned underwater vehicles (UUV); component parts and fittings for all the aforesaid goods
A mode S Interrogation Side Lobe Suppression System (ISLS) for an electronically scanned interrogator is described. One aspect introduces the 90° phase offset between the main and control beams thereby enabling the full power capability of the TRU to be effectively utilized and the effective beamwidth in Mode S to be sharply defined. The system allows the transmission of the simultaneous ISLS pulse of a Mode S all-call interrogation to be transmitted using the same array as is used by the main beam.
G01S 13/76 - Systems using reradiation of radio waves, e.g. secondary radar systemsAnalogous systems wherein pulse-type signals are transmitted
G01S 13/78 - Systems using reradiation of radio waves, e.g. secondary radar systemsAnalogous systems wherein pulse-type signals are transmitted discriminating between different kinds of targets, e.g. IFF-radar, i.e. identification of friend or foe
H01Q 25/02 - Antennas or antenna systems providing at least two radiating patterns providing sum and difference patterns
H01Q 3/38 - Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the relative phase or relative amplitude of energisation between two or more active radiating elementsArrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the distribution of energy across a radiating aperture varying the phase by electrical means with variable phase-shifters the phase-shifters being digital
A system and method of down converting microwave (RF) signals into lower frequencies are disclosed, such that associated electronics can more precisely analyse the signals. Exemplary embodiment, can be applied to multiple RF bands by using several optical wavelengths.
A technique for making high performance low noise amplifiers, low cost high performance RF, microwave circuits and other devices by using a minimum of costly high performance semiconductors is described. By combining a single discrete portion of an expensive semiconductor with a less expensive GaAs carrier, MMIC devices with improved performance over their discrete counterparts are achieved.
H01L 23/00 - Details of semiconductor or other solid state devices
H01L 25/16 - Assemblies consisting of a plurality of individual semiconductor or other solid-state devices the devices being of types provided for in two or more different subclasses of , , , , or , e.g. forming hybrid circuits
H01L 25/065 - Assemblies consisting of a plurality of individual semiconductor or other solid-state devices all the devices being of a type provided for in a single subclass of subclasses , , , , or , e.g. assemblies of rectifier diodes the devices not having separate containers the devices being of a type provided for in group
H01L 23/522 - Arrangements for conducting electric current within the device in operation from one component to another including external interconnections consisting of a multilayer structure of conductive and insulating layers inseparably formed on the semiconductor body
A rotor blade system having a plurality of rotor blades, wherein at least one of the rotor blades includes an outer surface having generally opposing first and second surfaces, the rotor blade including a fluid flow altering surface positioned relative to one of the first or second surfaces which is moveable between first and second positions, wherein movement of the fluid flow altering surface is effected by an expandable member.
09 - Scientific and electric apparatus and instruments
42 - Scientific, technological and industrial services, research and design
44 - Medical, veterinary, hygienic and cosmetic services; agriculture, horticulture and forestry services
Goods & Services
Weighing, measuring, signalling, checking apparatus, instruments, and regulators; scientific apparatus, instruments and simulators; apparatus for recording and transmission of data; sensors and detectors; electrical and electronic sensors; electric and electronic regulating and control apparatus; computer software; computer software and hardware for the transmission and reception of wireless data telemetry signals, modems, radio transmitters, signal converters; portable telemetry monitors; satellites; satellites for scientific purposes; satellite, miniaturised satellite and nano satellite apparatus, frames, receivers, aerials, processors, transmission apparatus, navigation apparatus and software; control, measuring and regulating apparatus, in particular electronic controls; electronic controls used for the inspection of needs for agricultural crops and an application method or system to fulfil those requirements; data processing equipment; electronic devices for inspecting crops; apparatus for sensing and measuring reflected light, sensors for determining and monitoring the growth and condition of plants and crops; parts, fittings and accessories for all the aforementioned; none of the aforesaid being for online or endpoint detection. Scientific and technological services and research and design relating thereto; agricultural research services; the collection, compilation and analysis of information relating to the environment and agricultural growth conditions; scientific data analysis services; design of computer programs for scientific data analysis; database design and development; setting up, operating, managing and supervision of monitoring systems and installations, including environmental and agricultural growth monitoring systems and installations; design, planning, monitoring and consultancy services for building, installation and construction of monitoring systems and installations and for related computer software and hardware; design and development of computer hardware and software; design and engineering of sensors; research, development and consultancy services in the field of sensor technology; design and engineering services in the field of analogue and digital measuring devices, data logging, telemetry systems, computer hardware and software information in the field of agricultural monitoring; agricultural services based on the observation of the earth by satellite in order to improve the management of agricultural production; advice, information and consultancy services relating to the aforesaid; none of the aforesaid being for online or endpoint detection. Agricultural advisory services; agricultural consultancy; agricultural services relating to optimizing crop production; nutritional monitoring of crops; advice, information and consultancy services relating to the aforesaid.
An aerofoil has a main portion of aerofoil cross section and a trailing edge portion (12) movable with respect to the main portion by an actuating device (14), the trailing edge portion (12) is movable at or about an area/point of flexion A, the area/point of flexion A is located at or adjacent a pressure or suction surface of the aerofoil, the trailing edge portion (12) is connected to the main portion by first and second connection members (18, 20), the first connection member (18) extends inwardly away from the area/point of flexion A and has an end which is directly or indirectly connected to the main portion, the first and second connection members (18, 20) are flexible.
B64C 27/82 - RotorcraftRotors peculiar thereto characterised by the provision of an auxiliary rotor or fluid-jet device for counter-balancing lifting-rotor torque or changing direction of rotorcraft
An aerofoil has a main portion of aerofoil cross section and a trailing edge portion (12) movable with respect to the main portion by an actuating device (14), the trailing edge portion (12) is movable at or about an area / point of flexion A, the area / point of flexion A is located at or adjacent a pressure or suction surface of the aerofoil, the trailing edge portion (12) is connected to the main portion by first and second connection members (18, 20), the first connection member (18) extends inwardly away from the area / point of flexion A and has an end which is directly or indirectly connected to the main portion, the first and second connection members (18, 20) are flexible.
A system and method for calibrating an imaging system includes a shutter that is moveable in to the optical path of the imaging system to generate an image of the shutter surface, which is flat and uniform. The shutter can be moved in and out of the optical path between first and second positions. The shutter is heated while in the second position and then returned to the first position. Data sets generated at two different temperatures enable the image generated by the imaging system in normal use to be to be adjusted for responsivity and variation in DC offset of the specific pixel array.
A camera for polarimetric, multispectral imaging is described. Such cameras are used in photonics, computational imaging and multispectral imaging in which both multispectral and polarimetric sensing modalities are used simultaneously for detection, recognition and identification. The camera enables multiple spectral images to be recorded simultaneously using polarizing beamsplitters and mirrors to divide the image according polarimetric and spectral bands. These multiple, polarized images are recorded on a single focal plane array (FPA) simultaneously. An image processor allows for the resolution of the subsequent image to be improved.
09 - Scientific and electric apparatus and instruments
38 - Telecommunications services
42 - Scientific, technological and industrial services, research and design
Goods & Services
Software for telecommunications services, namely, software for the operation and management of telephone communication, facsimile, voicemail, call processing, call waiting and internet telephony (VoIP) services. Telecommunication and communication services, namely, providing telephone communication services, facsimile transmission and services for voicemail; call processing, call waiting and internet telephony VoIP; providing online information in the field of telecommunications and telephony systems; transmission of data and information via satellite, laser beam, fibre-optic, radiotelephone, telephone, electronic or Internet Protocol oriented media; electronic mail services; providing access to the Internet and an Intranet, for creating a VPN and for using this system; telecommunications integration services; communications via electronic platforms; electronic data interchange services; telecommunications services for file creation, maintenance and document and information exchange services; communications services via the intranet, extranet, Internet and other electronic means; provision of telecommunications access to databases and the internet; information, consultancy and advisory services relating to all the aforesaid services including such services provided on-line or via the Internet or extranets. Scientific and technological services and research and design relating thereto; design and development of computer hardware and software; providing temporary use of on-line non-downloadable software for telecommunications services, namely, for use in the operation and management of local and long distance telephone services, online facsimile transmission, unified messaging, voice mail, call processing, call waiting and voice over Internet protocol services (VOIP), data security services for telephony systems.
A mechanism is disclosed to dismantle/erect a portable antenna that includes a linkage between radial driven elements and radial ground plane elements of the antenna which acts to cause them to move together between a collapsed and an erect arrangement.
H01Q 9/16 - Resonant antennas with feed intermediate between the extremities of the antenna, e.g. centre-fed dipole
H01Q 19/30 - Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic using a secondary device in the form of two or more substantially straight conductive elements the primary active element being centre-fed and substantially straight, e.g. Yagi antenna
H01Q 21/24 - Combinations of antenna units polarised in different directions for transmitting or receiving circularly and elliptically polarised waves or waves linearly polarised in any direction
H01Q 21/26 - Turnstile or like antennas comprising arrangements of three or more elongated elements disposed radially and symmetrically in a horizontal plane about a common centre
H01Q 7/00 - Loop antennas with a substantially uniform current distribution around the loop and having a directional radiation pattern in a plane perpendicular to the plane of the loop
H01Q 1/24 - SupportsMounting means by structural association with other equipment or articles with receiving set
H01Q 1/06 - Means for the lighting or illuminating of antennas, e.g. for purpose of warning
Modern military aircraft are prime targets for surface to air and air to air RF guided missiles. Modern missile systems in particular are difficult to counter and have an array of Electronic Protection Measures at their disposal. Expendable Active Decoys provide effective protection for fast jet platforms by creating a realistic false target that seduces the missile away from the protected platform. They can be fitted to almost all military platforms as they are expended from standard chaff and flare dispensers. Simple repeater devices have been produced in the past but they lack the sophistication to defeat modern threats. Digital RF Memory based jammers have the necessary capability but have always been too large due to their complexity. A system architecture, design features and technologies are disclosed to reduce the size of a Digital RF Memory 12 based jammer to fit within a volume 0.5 l.
F41H 11/02 - Anti-aircraft or anti-guided missile defence installations or systems
G01S 7/38 - Jamming means, e.g. producing false echoes
F42B 12/36 - Projectiles, missiles or mines characterised by the warhead, the intended effect, or the material characterised by the warhead or the intended effect for dispensing materialsProjectiles, missiles or mines characterised by the warhead, the intended effect, or the material characterised by the warhead or the intended effect for producing chemical or physical reactionProjectiles, missiles or mines characterised by the warhead, the intended effect, or the material characterised by the warhead or the intended effect for signalling
64.
Infra red detectors and methods of manufacturing infra red detectors using MOVPE
A method of forming infra red detector arrays is described, starting with the manufacture of a wafer. The wafer is formed from a GaAs or GaAs/Si substrate having CMT deposited thereon by MOVPE. The CMT deposited comprises a number of layers of differing composition, the composition being controlled during the MOVPE process and being dependent on the thickness of the layer deposited. Other layers are positioned between the active CMT layers and the substrate. A CdTe buffer layer aids the deposition of the CMT on the substrate and an etch stop layer is also provided. Once the wafer is formed, the buffer layer, the etch stop layer and all intervening layers are etched away leaving a wafer suitable for further processing into an infra red detector.
H01L 31/103 - Devices sensitive to infrared, visible or ultraviolet radiation characterised by only one potential barrier or surface barrier the potential barrier being of the PN homojunction type
A radar system having side lobe blanking capability is disclosed. The system can include a single channel antenna and receiver system, the side lobe blanking system being time multiplexed, but requiring no dedicated guard channel data collection period such that the scan rate of the system is not degraded.
G01S 13/53 - Discriminating between fixed and moving objects or between objects moving at different speeds using transmissions of interrupted pulse modulated waves based upon the phase or frequency shift resulting from movement of objects, with reference to the transmitted signals, e.g. coherent MTi performing filtering on a single spectral line and associated with one or more range gates with a phase detector or a frequency mixer to extract the Doppler information, e.g. pulse Doppler radar
66.
Device for holding a bearing member relative to a fixed body
A device for holding a bearing member relative to a fixed body, including a first part having a formation for engagement with a corresponding formation on a fixed body to hold the first part relative to the fixed body, and a receiving formation for receiving and slidably supporting a generally elongate second part, wherein a first end of the second part is configured for engagement with a part of a bearing member to hold the bearing member relative to the fixed body, and wherein a second, opposite, end of the second part supports an abutment member which prevents the first and second parts separating from each other, wherein the device includes biasing means for biasing the first end of the second part away from the first part.
A portable antenna is disclosed that can be collapsed into, and erected from, a housing. There is also a pull cord mechanism arranged, when pulled, to cause the antenna to revert between the erect or collapsed configurations. The pull cord extends from the antenna to a position in easy reach of the soldier's hand so that the antenna can be erected/collapsed remotely.
H01Q 9/16 - Resonant antennas with feed intermediate between the extremities of the antenna, e.g. centre-fed dipole
H01Q 19/30 - Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic using a secondary device in the form of two or more substantially straight conductive elements the primary active element being centre-fed and substantially straight, e.g. Yagi antenna
H01Q 21/24 - Combinations of antenna units polarised in different directions for transmitting or receiving circularly and elliptically polarised waves or waves linearly polarised in any direction
H01Q 21/26 - Turnstile or like antennas comprising arrangements of three or more elongated elements disposed radially and symmetrically in a horizontal plane about a common centre
H01Q 7/00 - Loop antennas with a substantially uniform current distribution around the loop and having a directional radiation pattern in a plane perpendicular to the plane of the loop
H01Q 1/24 - SupportsMounting means by structural association with other equipment or articles with receiving set
H01Q 1/06 - Means for the lighting or illuminating of antennas, e.g. for purpose of warning
A rotor blade system having a plurality of rotor blades, wherein at least one of the rotor blades includes an outer surface having generally opposing first and second surfaces, the rotor blade including a fluid flow altering surface positioned relative to one of the first or second surfaces which is moveable between first and second positions, wherein movement of the fluid flow altering surface is effected by an expandable member.
A portable antenna with a housing in which the antenna is held when not in use, and a mechanism to cause the antenna to pop-up from, and sit on top of, the housing when it is to be used. The mechanism can function to collapse the antenna into the housing when not in use.
H01Q 9/16 - Resonant antennas with feed intermediate between the extremities of the antenna, e.g. centre-fed dipole
H01Q 19/30 - Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic using a secondary device in the form of two or more substantially straight conductive elements the primary active element being centre-fed and substantially straight, e.g. Yagi antenna
H01Q 21/24 - Combinations of antenna units polarised in different directions for transmitting or receiving circularly and elliptically polarised waves or waves linearly polarised in any direction
H01Q 21/26 - Turnstile or like antennas comprising arrangements of three or more elongated elements disposed radially and symmetrically in a horizontal plane about a common centre
H01Q 7/00 - Loop antennas with a substantially uniform current distribution around the loop and having a directional radiation pattern in a plane perpendicular to the plane of the loop
H01Q 1/24 - SupportsMounting means by structural association with other equipment or articles with receiving set
H01Q 1/06 - Means for the lighting or illuminating of antennas, e.g. for purpose of warning
A radar surveillance system is described in which the radar beam re-visits each area of interest after a short period of time, by electronically reconfiguring a scanned beam to an offset position for an interleaved sub-dwell, within a scan period. This ‘look-back’ capability, where the area under test is re-visited after approximately 1 second, allows the natural de-correlation of sea clutter to take place between the initial and look-back samples of the surveillance area. The re-visit time can be adjusted to best exploit the de-correlation characteristics of the sea clutter return.
G01S 7/41 - Details of systems according to groups , , of systems according to group using analysis of echo signal for target characterisationTarget signatureTarget cross-section
G01S 13/42 - Simultaneous measurement of distance and other coordinates
71.
System and method for reducing the transmission of vibration from a first vibrating body to a second body
A system for reducing the transmission of vibration from a first vibrating body to a second body, the system having a first part connected to the first vibrating body, a second part connected to the second body and an electro-hydrostatic actuator connected to the first and second parts, the electro-hydrostatic actuator being operable to continuously oscillate the first and second parts 10 relative to each other at a frequency substantially corresponding to the frequency of vibration of the first vibrating body.
Modern military aircraft (2) are prime targets for surface to air and air to air RF guided missiles. Modern missile systems in particular are difficult to counter and have an array of Electronic Protection Measures at their disposal. Expendable Active Decoys provide effective protection for fast jet platforms (2) by creating a realistic false target (1) that seduces the missile away from the protected platform (2). They can be fitted to almost all military platforms (2) as they are expended from standard chaff and flare dispensers. Simple repeater devices have been produced in the past but they lack the sophistication to defeat modern threats. Digital RF Memory based jammers have the necessary capability but have always been too large due to their complexity. The invention discloses a system architecture, design features and technologies used to reduce the size of a Digital RF Memory (12) based jammer to fit within a volume 0.5I.
F41H 11/02 - Anti-aircraft or anti-guided missile defence installations or systems
F42B 12/36 - Projectiles, missiles or mines characterised by the warhead, the intended effect, or the material characterised by the warhead or the intended effect for dispensing materialsProjectiles, missiles or mines characterised by the warhead, the intended effect, or the material characterised by the warhead or the intended effect for producing chemical or physical reactionProjectiles, missiles or mines characterised by the warhead, the intended effect, or the material characterised by the warhead or the intended effect for signalling
G01S 7/38 - Jamming means, e.g. producing false echoes
An infrared detector system is described in which a despeckle filter is applied to image data generated by a High Operating Temperature (HOT) detector array. The filter reads the data associated with each pixel of the image generated and compares it with selected neighboring pixels. The comparison yields a series of values that are compared to predetermined thresholds and the pixel is scored according to the number of values that exceed the threshold set. The score assigned to the pixel then determines the treatment of the pixel in the image to be generated. The data value of the pixel may be ignored, included or substituted with an alternative calculated value.
H04N 5/367 - Noise processing, e.g. detecting, correcting, reducing or removing noise applied to fixed-pattern noise, e.g. non-uniformity of response applied to defects, e.g. non-responsive pixels
Typically at least one soldier of a unit on patrol carries a radio with antenna to enable communication with a base. The antenna is mounted to the soldier's rucksack (100) to keep the soldier's hands free. The antenna's radial members are unwieldy and liable to snag on passing objects which can lead to the antenna breaking. The antenna also makes the solider more conspicuous to the enemy. To prevent this, the antenna can be dismantled when not in use though this is time consuming. This problem is solved by providing an antenna with a housing (7) in which the antenna is held when not in use, and a mechanism (17) to cause the antenna to pop-up from, and sit on top of, the housing when it is to be used. The mechanism also functions to collapse the antenna into the housing when not in use.
H01Q 9/16 - Resonant antennas with feed intermediate between the extremities of the antenna, e.g. centre-fed dipole
H01Q 19/30 - Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic using a secondary device in the form of two or more substantially straight conductive elements the primary active element being centre-fed and substantially straight, e.g. Yagi antenna
H01Q 21/24 - Combinations of antenna units polarised in different directions for transmitting or receiving circularly and elliptically polarised waves or waves linearly polarised in any direction
H01Q 21/26 - Turnstile or like antennas comprising arrangements of three or more elongated elements disposed radially and symmetrically in a horizontal plane about a common centre
Typically at least one soldier of a unit on patrol carries a radio with antenna to provide means to communicate with a base. The antenna is often mounted to the soldier's rucksack (100) to keep the soldier's hands free. When erect, the antenna's radial driven members are unwieldy and liable to snag on passing objects which can lead to the antenna breaking. Rucksack mounted antenna also make the solider, and consequently the unit as a whole, more conspicuous to the enemy. To prevent this, the antenna can be dismantled when not in use. This is time consuming and requires the solider to remove his rucksack. This problem is solved through provision of an antenna (1A) that can be collapsed into, and erected from, a housing. There is also a pull cord mechanism (39,57) arranged, when pulled, to causes the antenna to revert between the erect or collapsed configurations. The pull cord extends from the antenna to a position in easy reach of the soldier's hand so that the antenna can be erected/collapsed remotely.
H01Q 9/16 - Resonant antennas with feed intermediate between the extremities of the antenna, e.g. centre-fed dipole
H01Q 19/30 - Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic using a secondary device in the form of two or more substantially straight conductive elements the primary active element being centre-fed and substantially straight, e.g. Yagi antenna
H01Q 21/24 - Combinations of antenna units polarised in different directions for transmitting or receiving circularly and elliptically polarised waves or waves linearly polarised in any direction
H01Q 21/26 - Turnstile or like antennas comprising arrangements of three or more elongated elements disposed radially and symmetrically in a horizontal plane about a common centre
Typically at least one soldier (S) of a unit on patrol carnes a radio to provide means to communicate with a base The antenna used with the radio is often mounted to the soldier's rucksack to keep the soldier's hands free A mechanism to dismantle/erect the antenna is described that includes a linkage (17) between radial driven elements (2) and radial ground plane elements (3) of the antenna which acts to cause them to move together between a collapsed and an erect arrangement
H01Q 9/16 - Resonant antennas with feed intermediate between the extremities of the antenna, e.g. centre-fed dipole
H01Q 19/30 - Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic using a secondary device in the form of two or more substantially straight conductive elements the primary active element being centre-fed and substantially straight, e.g. Yagi antenna
H01Q 21/24 - Combinations of antenna units polarised in different directions for transmitting or receiving circularly and elliptically polarised waves or waves linearly polarised in any direction
H01Q 21/26 - Turnstile or like antennas comprising arrangements of three or more elongated elements disposed radially and symmetrically in a horizontal plane about a common centre
An infrared detector system is described which includes a detector diode array 3 and a non volatile memory 1. The non volatile memory 1 can use CMOS Silicon Fuse technology which can be polysilicon devices that are programmed using voltage-current-time profiles suitable for the silicon process technology, such that when applied will cause the polysilicon element to heat up rapidly and melt. This results in the fuse element going open circuit, just like blowing a known fuse. The fuse can act as a logic element that has a one time, user programmable and permanent logic state. An array of such memory cells is can be mapped to a sub pixel diode detector array.
H04N 5/3745 - Addressed sensors, e.g. MOS or CMOS sensors having additional components embedded within a pixel or connected to a group of pixels within a sensor matrix, e.g. memories, A/D converters, pixel amplifiers, shared circuits or shared components
H04N 5/357 - Noise processing, e.g. detecting, correcting, reducing or removing noise
H04N 5/365 - Noise processing, e.g. detecting, correcting, reducing or removing noise applied to fixed-pattern noise, e.g. non-uniformity of response
H04N 5/367 - Noise processing, e.g. detecting, correcting, reducing or removing noise applied to fixed-pattern noise, e.g. non-uniformity of response applied to defects, e.g. non-responsive pixels
H04N 5/335 - Transforming light or analogous information into electric information using solid-state image sensors [SSIS]
78.
Radio frequency digital receiver system and method
A radio frequency digital receiver system and method is described in which the radio frequency digital receiver system uses a discrete Fourier transform where detection decisions are made based on a spectral estimate. The spectral estimate is formed from an output of the, in which the spectral estimate is improved by enabling spatially variant apodization (SVA) such that the detection ability of the RF digital receiver is improved. In a further embodiment, the SVA is optimized for use with Digital Signal Processing.
A helicopter tail rotor gearbox including a housing, an output shaft for connection to a tail rotor rotatably supported in the housing and having an open end therein, an input member rotatably supported in the housing, gearing providing a power transmitting connection between the input member and output shaft, a pitch control shaft for effecting a change in the pitch of the tail rotor, the pitch control shaft being disposed at least partially within the output shaft, rotatable therewith, and movable relative thereto along the rotational axis of the output shaft, an actuating member for effecting axial movement of the pitch control shaft, the actuating member being movable axially of the output shaft but held against rotation therewith, and a bearing assembly positioned in between the pitch control shaft and the actuating member for permitting relative rotation therebetween, wherein the gearbox includes at least one formation for diverting oil, dispersed within the housing in use, towards the open end of the output shaft.
A gearbox including a housing; an input member rotatably supported in the housing; a rotatable shaft supported in the housing; gearing providing a power transmitting connection between the input member and the rotatable shaft; and an oil feed member held against rotation relative to the housing; wherein the oil feed member has at least one helical formation for causing oil within the gearbox to be fed axially of the oil feed member, on rotation of the rotatable shaft.
An exemplary laser system is disclosed which includes a pump laser diode array and laser gain material, in which the array generates optical radiation having a predetermined total linewidth approximately 20 nm wide constructed from a plurality of individual wavelengths with a linewidth of up to 8 nm, the center wavelength of radiation being for example within the absorption band of laser gain material used at the center point of the operating temperature of the array. The system can include a highly reflecting plane mirror with periodic transmitting patches placed between the laser diode array and the laser gain material, the size of the transmitting patches being such that minimal pump radiation is lost.
H01S 3/08 - Construction or shape of optical resonators or components thereof
H01S 3/091 - Processes or apparatus for excitation, e.g. pumping using optical pumping
H01S 3/093 - Processes or apparatus for excitation, e.g. pumping using optical pumping by incoherent light of flash lamp focusing or directing the excitation energy into the active medium
H01S 3/0933 - Processes or apparatus for excitation, e.g. pumping using optical pumping by incoherent light of a semiconductor, e.g. light emitting diode
H01S 3/0941 - Processes or apparatus for excitation, e.g. pumping using optical pumping by coherent light of a semiconductor laser, e.g. of a laser diode
H01S 3/102 - Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating by controlling the active medium, e.g. by controlling the processes or apparatus for excitation
A system for reducing the transmission of vibration from a first vibrating body to a second body, the system having a first part connected to the first vibrating body, a second part connected to the second body and an electro-hydrostatic actuator connected to the first and second parts, the electro-hydrostatic actuator being operable to continuously oscillate the first and second parts 10 relative to each other at a frequency substantially corresponding to the frequency of vibration of the first vibrating body.
An imaging device is described having an electro-mechanical image stabilization system capable of removing the effect on a generated image of vibration and angular movement of the device. The system includes a mechanical coupling interposed between the optics and the drive electronics of the device. The coupling ensures that movement generated by vibration is translated into linear movement of the optics and the drive electronics relative to each other.
G02B 7/02 - Mountings, adjusting means, or light-tight connections, for optical elements for lenses
G02B 27/64 - Imaging systems using optical elements for stabilisation of the lateral and angular position of the image
G03B 5/00 - Adjustment of optical system relative to image or object surface other than for focusing of general interest for cameras, projectors or printers
H04N 5/232 - Devices for controlling television cameras, e.g. remote control
An aerofoil has a main portion of aerofoil cross section, an inner spanwise root end where the aerofoil is in use secured to a supporting structure, and at an outermost spanwise end outboard of the main portion, beyond a tip station, a tip region which includes a tip edge. The planform configuration of the tip edge lies on a first Bezier curve constructed from at least four control points, P1, P2, P3 and P4, each lying on the periphery of a polygon which bounds the tip region. Control point P1 is located on a leading edge of the aerofoil. Control point P2 is located on the second side of the polygon. Control point P3 is located on the third side of the polygon, and control point P4 is located at the outermost tip edge point at a trailing edge of the aerofoil.
A method of forming infra red detector arrays is described, starting with the manufacture of a wafer. The wafer is formed from a GaAs or GaAs/Si substrate having CMT deposited thereon by MOVPE. The CMT deposited can include a number of layers of differing composition, the composition being controlled during the MOVPE process and being dependent on the thickness of the layer deposited. A CdTe buffer layer can aid deposition of the CMT on the substrate. Once the wafer is formed, the buffer layer, an etch stop layer and any intervening layers can be etched away leaving a wafer suitable for further processing into an infra red detector.
H01L 31/103 - Devices sensitive to infrared, visible or ultraviolet radiation characterised by only one potential barrier or surface barrier the potential barrier being of the PN homojunction type
A gearbox including a housing; an input member rotatably supported in the housing; a rotatable shaft supported in the housing; gearing providing a power transmitting connection between the input member and the rotatable shaft; and an oil feed member held against rotation relative to the housing; wherein the oil feed member has at least one helical formation for causing oil within the gearbox to be fed axially of the oil feed member, on rotation of the rotatable shaft.
B64C 27/82 - RotorcraftRotors peculiar thereto characterised by the provision of an auxiliary rotor or fluid-jet device for counter-balancing lifting-rotor torque or changing direction of rotorcraft
B64D 35/00 - Transmitting power from power plants to propellers or rotorsArrangements of transmissions
F16H 57/04 - Features relating to lubrication or cooling
F16N 1/00 - Constructional modifications of parts of machines or apparatus for the purpose of lubrication
F16N 7/36 - Arrangements for supplying oil or unspecified lubricant from a stationary reservoir or the equivalent in or on the machine or member to be lubricated with feed by pumping action of the member to be lubricated or of a shaft of the machineCentrifugal lubrication
A helicopter tail rotor gearbox including a housing, an output shaft for connection to a tail rotor rotatably supported in the housing and having an open end therein, an input member rotatably supported in the housing, gearing providing a power transmitting connection between the input member and output shaft, a pitch control shaft for effecting a change in the pitch of the tail rotor, the pitch control shaft being disposed at least partially within the output shaft, rotatable therewith, and movable relative thereto along the rotational axis of the output shaft, an actuating member for effecting axial movement of the pitch control shaft, the actuating member being movable axially of the output shaft but held against rotation therewith, and a bearing assembly positioned in between the pitch control shaft and the actuating member for permitting relative rotation therebetween, wherein the gearbox includes at least one formation for diverting oil, dispersed within the housing in use, towards the open end of the output shaft.
B64C 27/82 - RotorcraftRotors peculiar thereto characterised by the provision of an auxiliary rotor or fluid-jet device for counter-balancing lifting-rotor torque or changing direction of rotorcraft
B64D 35/00 - Transmitting power from power plants to propellers or rotorsArrangements of transmissions
F16H 57/04 - Features relating to lubrication or cooling
F16N 1/00 - Constructional modifications of parts of machines or apparatus for the purpose of lubrication
F16N 7/36 - Arrangements for supplying oil or unspecified lubricant from a stationary reservoir or the equivalent in or on the machine or member to be lubricated with feed by pumping action of the member to be lubricated or of a shaft of the machineCentrifugal lubrication
A large format array is described having a series of smaller arrays daisy chained together to form the larger array. The smaller arrays are mounted on a base plate that may be of a non planar configuration. The daisy chaining together of the smaller arrays enables a smaller number of connections to be made to the external interface via connections.
G01J 5/20 - Radiation pyrometry, e.g. infrared or optical thermometry using electric radiation detectors using resistors, thermistors or semiconductors sensitive to radiation, e.g. photoconductive devices
A system and method of reducing undesirable image artifacts such as image tear and image smearing are described. The system can include a series of pixels and enhanced sensitivity circuits. The circuit can be configured so as to operate in an enhanced sensitivity mode having a combination of sample and hold circuits and binning functions, the combination acting so as to reduce the undesirable imaging artifacts.
H04N 3/14 - Scanning details of television systemsCombination thereof with generation of supply voltages by means not exclusively optical-mechanical by means of electrically scanned solid-state devices
H04N 5/3745 - Addressed sensors, e.g. MOS or CMOS sensors having additional components embedded within a pixel or connected to a group of pixels within a sensor matrix, e.g. memories, A/D converters, pixel amplifiers, shared circuits or shared components
An aerofoil has a main portion of aerofoil cross section, an inner spanwise root end where the aerofoil is in use secured to a supporting structure, and at an outermost spanwise end outboard of the main portion, beyond a tip station, a tip region, and the tip region including a tip edge, the planform configuration of the tip edge lying on a first Bezier curve constructed from at least four control points P1, P2, P3 and P4, the control points P1, P2, P3 and P4 each lying on the periphery of a polygon which bounds the tip region, Bezier control point P1 being located on a leading edge of the aerofoil at the tip station, which is at a spanwise position between 93.5%R and 95.9%R, where first and second sides of the polygon meet, the first side being at the tip station extending perpendicularly to a blade reference axis, which extends spanwise of the main portion of the aerofoil, and the second side being a tangent to the leading edge of the aerofoil at control point P1, which extends between control point P1 to a position where the second side meets a third side of the boundary polygon at a position outwardly of the tip edge, the third side being parallel to the first side and extending between the position where the third side meets the second side, to where the third side and a fourth side meet, control point P2 being located on the second side at a position between 30% and 80% along the second side from P1, control point P3 being located on the third side at a position between 30% and 90% along the third side from where the second and third sides meet, and control point P4 being located at the outermost tip edge point at a trailing edge of the aerofoil, where R is the effective aerofoil span.
An Infra Red detector system and method is disclosed that implements a digital coordinate generator onto a 2D focal plane array infrared detector. The method used in this form of the invention by the IR detector system, generates X-Y coordinate data for pixels containing detected target data. Advantageously, it reduces subsequent signal post processing required to generate the same data using numerical processing techniques in software and the latency that this introduces.
G01S 3/784 - Systems for determining direction or deviation from predetermined direction using amplitude comparison of signals derived from static detectors or detector systems using a mosaic of detectors
H04N 5/374 - Addressed sensors, e.g. MOS or CMOS sensors
An Infra Red detector system and method is disclosed. There is benefit in providing signal processing functions into each pixel of a 2D focal plane IR detector for applications such as hostile target detection. The thermal characteristics of muzzle flash or a projectile and it's trajectory for example are distinguishable from background scene. A technique to add a signal detection function to normal IR detector thermal imaging operation to a standard direct inject Integrate While Read (IWR) pixel circuit and for providing target detection at extremely high data rates is described.
H04N 5/3745 - Addressed sensors, e.g. MOS or CMOS sensors having additional components embedded within a pixel or connected to a group of pixels within a sensor matrix, e.g. memories, A/D converters, pixel amplifiers, shared circuits or shared components
A method of identifying and tracking a target is described, in which seismic data relating to a target is passively detected and processed using statistical means. The statistical manipulation of the data includes frequency information extraction, dynamical mixture model construction based on existing known data and identification of an unknown target by the convergence of this model to a state characteristic of that target.
G01S 3/80 - Direction-finders for determining the direction from which infrasonic, sonic, ultrasonic, or electromagnetic waves, or particle emission, not having a directional significance, are being received using ultrasonic, sonic, or infrasonic waves
A detector system is described in which an image of a scene is displaced with reference to a dual waveband detector array. Such ‘scanning’ increases the sampling density, thereby reducing the effective pixel pitch, by moving the image of the scene relative to the detector array by fractions of a pixel pitch in sequential frames. The display is then reconstructed with the data from these frames interleaved relative to the original scan displacement.
H04N 3/14 - Scanning details of television systemsCombination thereof with generation of supply voltages by means not exclusively optical-mechanical by means of electrically scanned solid-state devices
H04N 5/349 - 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 for increasing resolution by shifting the sensor relative to the scene
G02B 13/14 - Optical objectives specially designed for the purposes specified below for use with infrared or ultraviolet radiation
95.
Imaging device and method for processing image data of a large area array
An imaging device is capable of on-chip processing data output by a series of pixels 1, 2, 16. The pixels 1, 2, 16 are arranged into a series of super pixels or tiles that together form a large area array. The pixels 1, 2, 16 are arranged into two groups, nominally group A (odd pixels) and group B (even pixels). Data from the individual pixels 1, 2, 16 is read out according to the relative position of the pixel within each group. The technique employed by the device allows the array data rate to be controlled dynamically by the super pixel information content. The output data bandwidth is increased at the expense of image spatial resolution where scene content contains large uniform areas (e.g. desert, sea, sky) that would otherwise generate huge amounts of similar data that carries little additional information.
H04N 3/14 - Scanning details of television systemsCombination thereof with generation of supply voltages by means not exclusively optical-mechanical by means of electrically scanned solid-state devices
H04N 5/335 - Transforming light or analogous information into electric information using solid-state image sensors [SSIS]
This invention relates to utilizing a larger number of lower power transmit/receive modules in a phased antenna array in order to utilize cheaper and simpler transmit/receive modules whilst retaining comparable power per unit area as can be achieved through using conventional high powered transmit/receive modules. The advantage of this arrangement is that cheaper antenna arrays can be constructed without limiting the capability and/or performance of a system incorporating such an array when compared to a conventional solution.
H01Q 3/00 - Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system
A device such as an aerofoil which in use is subject to fluid flow, includes an outer surface part the geometry of which is variable to affect the fluid flow, the device including a support structure which supports the outer surface part, the support structure being internal of the device and including a plurality of support members of composite material the geometry of the support structure being changeable by an actuating apparatus, between a first stable geometry and a second stable geometry to effect variation in the geometry of the outer surface part, the support members providing structure stiffness to the outer surface part.
A device such as an aerofoil which in use is subject to fluid flow, includes an outer surface part the geometry of which is variable to affect the fluid flow, the device including a support structure which supports the outer surface part, the support structure being internal of the device and including a plurality of support members of composite material the geometry of the support structure being changeable by an actuating apparatus, between a first stable geometry and a second stable geometry to effect variation in the geometry of the outer surface part, the support members providing structure stiffness to the outer surface part.
A phased array antenna is disclosed where the transmit/receive modules are replaced by a series of separately packaged components. The components include, for example, a vector control component, a high power amplifier component, a low noise amplifier component, a transmit/receive duplexing component and ancillary supporting components. An advantage of this arrangement is that cheaper antenna arrays can be constructed without limiting the capability and/or performance of a system incorporating such an array when compared to known solutions.
A target tracking device incorporating a Position Sensitive Detector (PSD) 1 is described. A target is illuminated by a laser of a suitable wavelength. The target reflects the laser radiation and the reflected radiation is incident on a flying vehicle carrying a target tracking device. The PSD in the device outputs a signal representative of the position of the incident laser spot. The output signal is input into control electronics, the control electronics incorporating a resistive transimpedance amplifier. A higher than usual bias voltage is applied to the PSD yielding improved pulse response of the target tracking device. Therefore, the tracking device is particularly suited for use with a target marking laser having a short pulse duration.
