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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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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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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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6571043 |
Large screen fiber optic display with high fiber density and method for its rapid assembly
This invention encompasses a method for the manufacture and rapid assembly of large screen fiber optic displays ( 1, 2 ) containing a very large number of individual fibers (thousands to hundreds...
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6548820 |
Optical synthetic aperture array
A synthetic aperture system for producing a non-periodic pattern in a region of overlap. The system includes a source of electromagnetic radiation producing a plurality of electromagnetic beams, a...
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6522311 |
Image information displaying system and hologram display apparatus
An image information displaying system comprises a transparent support, a hologram screen attached to the transparent support, a radiation unit for radiating image information on the hologram...
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6486982 |
System for making a hologram of an image by manipulating object beam characteristics to reflect image data
A system for converting an image into a hologram formed from diffraction gratings includes obtaining image data for each pixel in an image to be converted, putting it into digital form and using...
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6473208 |
Two-color holographic recording apparatus
A two-color holographic recording apparatus reduces error signals possibly included in reproduced digital data signals. The two-color holographic recording apparatus has first, second and third...
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6466372 |
Systems for projecting images from diffractive phase plates
A system for projecting images is provided having a group of diffractive phase plates each encoded with different image information which have phase shifts aligned to reconstruct visible images in...
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6445470 |
Apparatus for simultaneous spatial modulation of incoherent/coherent angulary multiplexed optical beams
Novel apparatus for simultaneous spatial modulation of a set of angularly multiplexed individually coherent but mutually incoherent optical beams is disclosed, comprising means for generating a set...
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6396985 |
Contoured large screen display apparatus
An apparatus for use in contoured architectural milieus includes a contoured large screen display having a mounting means to which modular flat display tiles including, tiles of diverse or...
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6377367 |
Method of recording and reproducing hologram and apparatus for recording and reproducing hologram
The first reading beam identical to the first reference beam and the second reading beam conjugate to the second reference beam are simultaneously applied to a hologram recording medium 1, on...
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6356854 |
Holographic object position and type sensing system and method
Systems and methods for determining the position and classification of an object and which may provide signals that control deployment of an active restraint device, for example. Using a pulsed...
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6330361 |
Adaptively aligned optical correlator and method
An improved optical correlator using a coherent light beam employs a method of adaptive alignment. A test pattern modulates an input spatial light modulator. The modulated beam propagates through...
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6322932 |
Holographic process and media therefor
High storage densities using a holographic system are achievable using a stratified medium while maintaining a relatively high selectivity upon reconstruction of the stored images. Such combination...
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6285474 |
Holographic recording method and filtering method
A method and an apparatus capable of filtering based on desired spatial frequency characteristics without loss of Fourier spectrum frequency components, and of matched filtering of high recognition...
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6281993 |
Phase shifting element for optical information processing storing systems
Optical information processor and storage of pixelated data pattern in a Fourier plane of a lens as achieved by a plurality of optical elements operating with a spatial light modulator. A laser...
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6268941 |
Holographic display screen with integrated speckle suppression
A method for suppressing image speckles in a holographic screen is provided in which the screen is illuminated in the hologram in a plurality of individual steps, changing the recording parameters...
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6262818 |
Method for simultaneous amplitude and quantitative phase contrast imaging by numerical reconstruction of digital holograms
A method for the numerical reconstruction of digital holograms which allows simultaneously amplitude and quantitative phase contrast imaging. The reconstruction method computes the propagation of...
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6246495 |
Phase-shift digital holographic apparatus
A phase-shift digital holographic apparatus shifts the phase of a reference wave by a phase shifting means, produces holographic image data by a holographic image pickup means having an image...
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6208439 |
Generalized geometric transforms for computer generated holograms
A technique for mapping working images to adjacently and continuously tiled subapertures having CGHs on a plate is disclosed with the result that the entirety of a working area of a plate is...
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6191875 |
Process for holography using reference beam having correlated phase content
An improved process for holography is provided, in which the reference beam used for storage and readout has a correlated phase content. In particular, it was found that reference beams having...
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6178019 |
System and method for controlling the selectivity of a holographic memory system
A system and method for controlling the selectivity function in a holographic memory system that permits more rapid location and retrieval of holographically stored data. The system and method...
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6157473 |
Holographic storage system incorporated therein a parabolic mirror
A holographic storage system implements both a rotational and an angular multiplexings in combination. The system comprises a light source, a pair of wedge prisms, a beam splitter, a first, a...
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6140660 |
Optical synthetic aperture array
A synthetic aperture system for producing a non-periodic pattern in a region of overlap. The system includes a source of electromagnetic radiation producing a plurality of electromagnetic beams, a...
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6128109 |
Apparatus for incoherent/coherent readout and display of information stored in double angularly multiplexed volume holographic optical elements
Apparatus is provided for the readout, and in certain applications the display, of information stored within incoherent/coherent double angularly multiplexed volume holographic optical elements....
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6108110 |
Optical relay for pixel-based holographic storage and retrieval
A holographic storage and retrieval system for use in co-propagating or counter-propagating geometries having a common optical relay for guiding a signal beam and a reference beam along a common...
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6097513 |
Holographic memory device
A holographic memory device includes: a hologram memory part for information recording by using a reference beam and an object beam, the hologram memory part having a plurality of cells; a first...
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6088321 |
Volume holographic memory apparatus having a reference beam and a signal beam with opposite intensity distributions
A volume holographic memory-based optical information-recording/reproducing apparatus is capable of enhancing density of spatial multiple recording. A recording medium is mounted in the apparatus...
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6072608 |
Compact architecture for holographic systems
An architecture for holographic data storage and processing integrates multifunctional silicon-based optoelectronic devices, rewritable holographic material, optical devices and other...
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6049402 |
Multiplexed phase-conjugate holographic data storage using a buffer hologram
An optical storage system, which includes a temporary buffer and an optical storage medium, allows the practical combination of phase-conjugation and hologram multiplexing. The temporary buffer...
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6040883 |
Programmable hologram generator
A programmable hologram generator comprises a layered structure of a pixelated VLSI chip, a reflective ferroelectric liquid crystal that is physically disposed on the VLSI chip, and a...
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6031643 |
Method for holographic storage
The present invention is a method for optical data storage which enhances the contrast between ON and OFF pixels. The method comprises writing a two-dimensional image comprising a plurality of...
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6018402 |
Apparatus and method for phase-encoding off-axis spatial light modulators within holographic data systems
Embodiments of the invention include an off-axis amplitude and phase encoding optical system, apparatus and method of storage in which a holographic optical element (HOE) is used advantageously to...
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5978112 |
Non-volatile readout of shift multiplexed holograms
The present invention is a holographic reconstruction device for reconstructing successive holograms previously recorded by a recording reference beam in a recording medium, each previously...
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5963684 |
Multiple-wavelength optical transceiver
An optical demultiplexing apparatus is capable of spatially separating a multiplexed optical signal into two or more optical wavelength signals thereof. An input multiplexed optical signal present...
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5952988 |
Display having gradient response pixels
A display includes a plurality of individually electrically controllable pixels. Each pixel has a layer of light controlling medium extending over a predetermined area of the pixel. The light...
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5949558 |
Holographic storage using shift multiplexing
The invention is embodied in a method of recording successive holograms in a recording medium, using at least a fan of M waves along at least a first axis with a separation angle between adjacent...
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5943145 |
Phase distance multiplex holography
Selection of individual holograms during read-out of a multiplexed array depends upon varying relative position of the recording medium in the direction orthogonal to the medium surface.
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5940193 |
General purpose quantum computing
Method and apparatus are provided for a general purpose photonic computer. A data signal is input through an encoder to encode such signal with an instruction. The encoded signal is transmitted by...
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5940514 |
Encrypted holographic data storage based on orthogonal phase code multiplexing
An encryption method and apparatus for holographic data storage are disclosed. In a system using orthogonal phase-code multiplexing, data is encrypted by modulating the reference beam using an...
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5926295 |
Holographic process and device using incoherent light
An optical device for generating a signal based on a distance of an object from the optical device. The optical device includes a first polarizer, a birefringent crystal positioned optically...
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