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7385741 |
Holographic recording system and optical chopper
A holographic recording system with a simple structure is provided that can make a holographic recording beam follow a recording medium traveling even at high speed. The holographic recording...
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7362482 |
Inline type speckle multiplexed hologram recording apparatus and inline type speckle multiplexed hologram recording method
An inline type speckle multiplexed hologram recording apparatus and method is disclosed which can condense signal light and reference light in a sufficiently overlapping relationship with each...
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7355767 |
Hologram recording method and hologram recording apparatus
A hologram recording method includes generating a signal beam with data formed by superimposing pattern data, the pattern data representing a pattern in which a large number of plural kinds of...
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7324255 |
Spatial optical modulator
A spatial light modulator, in which light modulation elements are arranged in a same plane. In the spatial light modulator, a plurality of the light modulation elements are arranged such that there...
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7317814 |
Authentication system and method
An authentication system using a correlator that correlates an input with a reference wherein at least one of the input and reference comprises a phase volume mask having structures, preferably...
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7304775 |
Actively stabilized, single input beam, interference lithography system and method
An interference lithography system is described that is capable of exposing high resolution patterns in photosensitive media and employing yield increasing active stabilization techniques needed in...
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7295356 |
Method for improved holographic recording using beam apodization
An apodization system for achieving a substantially uniform intensity profile of a modulated reference beam on a holographic recording medium. The substantially uniform intensity profile serves to...
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7289253 |
System and methods for shearless hologram acquisition
Systems and methods for shearless digital hologram acquisition, including an apparatus incorporating an illumination source configured to produce a first beam of light, which is then split by a...
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7274432 |
Radiation system, lithographic apparatus, device manufacturing method, and device manufactured thereby
A radiation system for multiplexing radiation includes two radiation sub-sources. The sub-sources each provide a certain amount of radiation. The system further includes a member with reflecting...
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7254106 |
Method and equipment for storing holographic data
A method for storing holographic data in a medium having a reflection layer and a recording layer comprises: recording, rotating and repeating. An interference pattern is recorded at a recording...
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7221496 |
Optical element
A complex amplitude spatial optical modulation element for low 0th-order diffraction light has a plurality of three-dimensional cells two-dimensionally on an XY plane. Each cell is light...
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7202919 |
Holographic data storage with PDLC spatial light modulator generating reference and object beams
The invention is directed to a holographic data storage system including a spatial light modulator device (SLM) that comprises optical elements in the form of polymer dispersed liquid crystal...
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7193879 |
Techniques for multiple frequency chirp readout of material with inhomogeneously broadened absorption spectrum
Techniques for reading the spectral content of a spatial-spectral grating in an inhomogeneously broadened transition (IBT) material include directing multiple probe waveforms to probe a spatial...
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7184183 |
Hologram recording/reproducing apparatus and hologram recording/reproducing method
This invention provides a hologram recording apparatus for recording an interference fringe, generated by interference of a first light beam subjected to spatial light modulation by recording data...
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7172288 |
Display device including a spatial light modulator with plural image regions
A display device includes a spatial light modulator and a light generator. The spatial light modulator may have an array of modulating elements with a plurality of image regions. The light...
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7154646 |
Optical recording apparatus and optical recording/reproducing apparatus
An optical recording/reproducing apparatus having excellent resistance against vibration and noise. In recording, coherent light is polarization-modulated with a spatial light modulator to generate...
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7154645 |
Holographic recording method and apparatus
A holographic recording method and a holographic recording apparatus capable of selectively rewriting or erasing only desired data without degrading data other than the desired data are provided....
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7145710 |
Optical processing
To operate an optical device comprising an SLM with a two-dimensional array of controllable phase-modulating elements groups of individual phase-modulating elements are delineated, and control data...
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7130092 |
Apparatus and method for recording and reproducing optical information
An optical information recording/reproducing apparatus generates information light by modulating light emitted by a light source device with a light modulator depending on the information to be...
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7106510 |
Wavefront coded imaging systems
The present invention provides improved Wavefront Coding imaging apparatus and methods composed of optics, a detector, and processing of the detected image. The optics are constructed and arranged...
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7088482 |
Holographic recording techniques using first and second portions of a spatial light modulator
The invention is directed to holographic recording techniques that generate a data encoded object beam and a reference beam using a spatial light modulator of the holographic recording system. An...
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7088481 |
Holographic recording techniques using reference zone of spatial light modulator
The invention is directed to holographic recording techniques that generate a data encoded object beam and a reference beam using a spatial light modulator of the holographic recording system. An...
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7085026 |
Apparatus and method for recording and reproducing optical information
The present invention makes it possible to reduce the size of an optical system for multiplex recording or reproduction of information utilizing holography. A pick-up of an optical information...
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7085025 |
Apparatus for recording optical information
Optical information is stored in an optical information recording medium having an information recording layer utilizing holography with an optical information recording apparatus which includes...
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7081977 |
Angular multiplexing apparatus for holographic storage medium
An angular multiplexing apparatus for a holographic storage medium. The angular multiplexing apparatus includes a reconstructing reference beam generator, translated in parallel to a number of...
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7064875 |
Optical recording apparatus and optical recording/reproducing apparatus
An optical recording/reproducing apparatus having excellent resistance against vibration and noise is provided. In recording, coherent light is polarization-modulated with a spatial light modulator...
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7042643 |
Interferometric modulation of radiation
An Interferometric Modulator (IMod) is a microelectromechanical device for modulating light using interference. The colors of these devices may be determined in a spatial fashion, and their...
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7035006 |
Screen for image display apparatus, method for manufacturing screen for image display apparatus, and image display apparatus
A screen for image display apparatus according to the present invention has a base member, a light absorption layer formed on the base member and adapted for absorbing light of a visible light...
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7012722 |
Holographic recording apparatus
A holographic recording apparatus which can stably record data to be recorded onto a recording medium. The holographic recording apparatus of the present invention includes: a light source for...
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6995882 |
Apparatus for recording optical information
The present invention makes it possible to reduce the size of an optical system for multiplex recording or reproduction of information utilizing holography. A pick-up ( 11 ) of an optical...
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6987592 |
Spatial light modulator and holographic recording/reproducing apparatus
A spatial light modulator (SLM) 101 has a multiplicity of pixels 101 a arranged in a lattice form for selecting a transmission state (on) and a blocking state (off) of light on each pixel...
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6980337 |
Apparatus and method for recording digital data on a holographic storage system
A holographic apparatus includes a mask for modulating a signal beam to generate a modulated signal beam; a conical prism, which has a cone portion and a base portion, for refracting a reference...
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6943924 |
Apparatus and method for digital holographic imaging
The present invention is related to a method for performing digital holographic imaging (DHI), said DHI being characterized by the fact that images of a sample are obtained by applying numerical...
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6940653 |
Radiation conditioning system
A holographic imaging system and method includes a radiation source for generating radiation. A data base has a set of elements, each element is indicative of a trajectory of a light ray exiting a...
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6934074 |
Optical element and manufacturing method thereof
An optical element has of a set a plurality of three-dimensional cells. A specific amplitude and a specific phase are defined in each individual cell. Each cell has a concave part formed by...
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6900914 |
Optical information recording and reproducing apparatus having volume holographic memory
A description is provided of an optical information recording and reproducing apparatus having a volume holographic memory. The apparatus is capable of recording an interference pattern in the...
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6873444 |
Volume holograms in transparent materials
This invention discloses a method of producing, in a solid transparent material ( 3 ), a hologram of an object; the method includes the steps of: developing a three-dimensional mathematical model...
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6862121 |
Method and apparatus for holographic recording of fast phenomena
Holographic methods for recording fast movies whose speed is limited by the laser pulse duration if the recording material has sufficient sensitivity to reliably record a frame of the fast event...
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6862120 |
Hologram recording medium, hologram recording method and hologram recording and reproducing apparatus
In a hologram recording method for forming a plurality of areas of a refractive index light interference pattern of a coherent signal light beam in accordance with information data within a...
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6850346 |
Method and apparatus for storing and retrieving a sequence of digital page data
In a storing mode of an apparatus for storing and retrieving a sequence of digital page data, a first/second complex reference beam and a modulated signal beam converge on a storing location to...
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6844949 |
Method and apparatus for storing and retrieving digital page data
In a storing mode of an apparatus for sequentially storing and retrieving digital page data, a first and second complex reference beams and a modulated and second signal beams converge on a...
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6819460 |
Apparatus and methods for routing of optical beams via time-domain spatial-spectral filtering
Apparatus and methods are disclosed for spatially routing an optical pulse (data pulse) of an electromagnetic radiation and containing a specific address temporal profile and possibly additional...
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6819453 |
Image processing apparatus
In an image processing circuit, a color correction section, an area determination section and a MTF correction section each comprises a rewritable device (for example, field programmable gate array...
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6798547 |
Process for holographic multiplexing
A method of recording holograms includes: generating a first signal-beam from a signal-beam source and a first reference beam from a reference-beam source; recording a first hologram in a...
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6744909 |
Authentication system and method
An authentication system using a correlator that correlates an input with a reference wherein at least one of the input and reference comprises a phase volume mask having structures, preferably...
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6736512 |
Pixel element for a three-dimensional screen
A pixel element for a 3D display, wherein multiple substantially collimated controllable light beams are emitted in multiple directions, with each light beam associated with a predetermined viewing...
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6709790 |
Method and apparatus for generating periodic structures in substrates by synthetic wavelength holograph exposure
A substrate surface 10 having a photo-sensitive material surface thereon is simultaneously exposed to four plane waves of light at angles of incidence θ, −θ, φ and −φ subtending from the...
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6707585 |
Holographic recording and reproducing apparatus and holographic recording and reproducing method
An apparatus includes recording reference optics, recording signal optics, and reproducing reference optics. The recording reference optics supplies a recording reference light beam to a recording...
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6700686 |
System and method for holographic storage
The present invention provides a solution to the needs described above through a system and method for holographic storage. The system comprises a laser light source, a first beam splitter for...
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6697180 |
Rotation correlation multiplex holography
Holography in which an array of overlapping holograms is recorded or reconstructed in a recording medium, holograms being produced by interference of a reference beam and a signal beam, in which...
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