Matches 101 - 150 out of 217 < 1 2 3 4 5 >
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5859808 System and method for steering fresnel region data to access data locations in a holographic memory  
Systems and methods for steering an optical path to gain access to data locations in a holographic memory cell (HMC). One of the systems includes: (1) a refractive element that receives a complex,...
5859713 Imaging in a scattering medium using photon density waves  
Image derogating optical noise due to light scattering of an object under examination, embedded in a light scattering medium, is substantially reduced by passing a modulated signal laser beam...
5835470 System and method for steering focal plane data using cylindrical coordinates to access data locations in a holographic memory  
Systems and methods for steering a complex, spatially-modulated incident beam of coherent light to gain access to data locations in a holographic memory cell (HMC). One of the systems includes: (1)...
5822092 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...
5812318 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...
5793504 Hybrid angular/spatial holographic multiplexer  
A plurality of holograms are simultaneously angularly and spatially multiplexed within a storage medium by writing the holograms at different locations within the storage medium using reference and...
5719691 Phase correlation multiplex holography  
Holograms within an array are recorded and/or read out by use of a reference/read out beam produced by illumination of a phase mask.
5703702 Holographic synthesis  
A tight packed array of amplitude controlled in-phase light emitters produces dynamic real holographic images. A partially reflecting mirror is applied to a planar array of amplitude controlled...
5689351 Holographic memory readout with reduced speckle  
A method and apparatus are provided for reducing speckle noise in images read out from holographic memories. An image recorded in the memory is read out using a multiple component readout beam,...
5671073 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...
5661577 Incoherent/coherent double angularly multiplexed volume holographic optical elements  
Novel multiplexed volume holographic optical elements for the development of highly multiplexed photonic interconnection and holographic memory systems with maximum optical throughput efficiency...
5642210 Method for mitigating cross-talk in high-efficiency holograms  
In a method for mitigating cross-talk in high-efficiency, angle-multiplexed holograms stored in photorefractive media, a plurality of uniformly low-efficiency holograms are first stored within a...
5640255 Holographic authentication patch  
A method is disclosed to holographically mark an object in a way that the mark cannot be removed, reproduced, or transferred covertly. The mark can be read from a distance so that the part can be...
5638193 Method and apparatus for azimuthal multiplexing of holograms  
A holographic storage system and method are provided in which a light source (12) is used to generate a coherent light beam which is split into a reference beam (18) and an object beam (20). The...
5627664 Holographic storage with combined orthogonal phase codes and random phase codes  
A method and apparatus for holographic storage with combined orthogonal phase codes and random phase codes are provided in which a reference beam (18) is encoded with a combination orthogonal phase...
5594564 Space light modulating apparatus having a length to width ratio of 30:1 and staggered drivers  
A space light modulating apparatus suitable for reconstruction of an electronic 1-dimensional hologram having no movable section. A predetermined display region is divided into a plurality of...
5594559 Stereoscopic display apparatus  
A space light modulating apparatus and a stereoscopic display apparatus which are used in a rewritable hologram stereoscopic display. A solid image can be properly displayed by a phase distribution...
5590367 Processing module for programmable processing using computer generated holograms  
This is a processing module which may be used for parallel processing. Multiple software configurable optical interconnections provide for high speed processing which preferably use computer...
5587847 Laser protection window using holographic optical element and channel plates  
The present invention is a laser protection window for protection from uncontrolled laser illumination. This laser protection window includes a holographic optical element forming a reflection...
5587815 Phase modulation holographic device for generating two different wavefronts  
A phase modulating device for spatially modulating a phase of an incident light beam is of a binary type having a plurality of rectangular protrusions on a cross section thereof. A distribution is...
5548772 Parallel processing system with programmable optical interconnects  
This is a programmable processing system which comprises: one or more computer networks each of the networks has at least one population of processor nodes; at least one population of storage...
5543251 Method of recording plural holographic images into a holographic recording material by temporal interleaving  
Holographic images are constructed in a recording material in accordance with a temporal interleaving technique in which a first set of images is constructed for a predetermined first imaging time...
5541744 Holographic process and device using incoherent light  
The present invention concerns a holographic process including a stage consisting in producing the hologram of a point P thank to an optical device including a crystal (131) and two polarizers...
5529861 Method for enhancing the utility of a photopolymer recording media for holographic data recording  
A holographic storage media (10) is fabricated from a thin layer of photopolymer recording media. The photopolymer recording media is disposed between a substrate (48) and a capping layer (56). The...
5502581 Hologram manufacturing method and apparatus  
A hologram manufacturing apparatus and a hologram manufacturing method for manufacturing a hologram optical device by a split exposure method are disclosed. The manufacturing apparatus comprises...
5497254 Optical apparatus including a liquid crystal modulator  
An optical apparatus for controlling a wave front of a coherent light including at least a coherent light source, an electrically addressable liquid crystal device having a plurality of pixels...
5497253 Multi-layer opto-electronic neural network  
A pattern recognition apparatus and a method for operating same. The apparatus includes a volume holographic medium (4) having a plurality of Fourier-space volume holograms representing pattern...
5483365 Method for holographic storage using peristrophic multiplexing  
A peristrophic multiplexing system directs a signal light beam and reference light beam onto a selected recording spot in the recording medium. The light beams collectively define a plane of...
5479238 High resolution imagery systems and methods  
The current limits of resolution of multi-element optical systems are exceeded by reducing the number of elements while introducing at the critical aperture a blazed transmission grating having...
5438440 Holographic code division multiple access  
A technique for all-optical Code Division Multiple Access (CDMA) system based on optical holography is disclosed. In this technique the energy of an incoming information light signal is spread over...
5438439 Non-destructive readout mechanism for volume holograms using two wavelengths  
Multiple volume holograms are recorded by changing the incidence angle of the reference beam at one wavelength. The stored holograms are reconstructed at another wavelength by using the reference...
5428466 Neural networks  
A neural network has inputs formed by square array of optical modulators M ij and outputs by optical detectors D ij coupled to threshold comparators. A holographic plate includes a spatial...
5416616 Incoherent/coherent readout of double angularly multiplexed volume holographic optical elements  
Novel apparatuses for readout of multiplexed volume holographic optical elements, based on parallel incoherent/coherent double angularly multiplexed holographic recording and readout principles,...
5396368 Flexible rejection filter (U)  
A flexible rejection filter removes coherent radiation from an incoming beam of light. The filter includes a beamsplitter for dividing the transmitted portion into first and second beams. A...
5363221 Optical multiplexer  
Light from a laser (10) is divided by a beam splitter (12) to provide signal (15) and reference (14) channels. The signal channel light is expanded (11) to illuminate an acousto-optic (AO) device...
5307183 Apparatus and method for fabricating a curved grating in a surface emitting distributed feedback semiconductor laser diode device  
An apparatus 10 for exposing a curved grating pattern of monochromatic light on a photoresist coated semiconductor wafer 12 includes an argon gas laser 14 that outputs a monochromatic light beam...
5296950 Optical signal free-space conversion board  
This is a board to transport and convert optical outgoing free-space signals from a spatial light modulator which comprises: at least one detector to process the outgoing free-space signal; at...
5291314 Spatial light modulator device and a conoscopic holography system of large dynamic range including such a modulator device  
The invention relates to a spatial light modulator device comprising a photo-refractive crystal addressed by means of a write light beam and a read light beam. The crystal is placed in the cavity...
5285308 Spatial light modulators for incoherent/coherent multiplexed holographic recording and readout  
The present invention relates to a novel spatial light modulator comprising a plurality of individual pixels that each contain separate detectors, electronic circuitry, and optical modulators. A...
5283777 Three-dimensional optical recording medium and optical information recording apparatus using the same  
A three-dimensional optical recording medium is made of a photo-induced refractive index-changing material or two-photons absorbing material, which is based on photo-dissociation or...
5262879 Holographic image conversion method for making a controlled holographic grating  
A method for converting a 2-D image into a hologram is set forth. An optical scanner system which measures the primary color intensity of a selected pixel and forms an indication thereof is...
5258860 Optical phase adder  
A photosensitive element 46 absorbs at least a portion of an incident write beam 40, causing a spatially varying electric field to be applied across a layer of a ferroelectric liquid crystal (FLC)...
5235440 Optical interconnector and highly interconnected, learning neural network incorporating optical interconnector therein  
A variable weight optical interconnector is disclosed to include a projecting device and an interconnection weighting device remote from the projecting device. The projecting device projects a...
5227898 Near real-time holographic display for remote operations  
A near-real-time holographic display for operations at a remote work site where a three dimensional database is collected with a laser range scanner. The database is then divided into discrete two...
5223966 Method and apparatus for obtaining modulated light indicative of an image operationally formed by projecting an inputted image on the flat plate of an optical induction reflective index crystal  
An optical logic operation apparatus includes an optical induction refractive index crystal having first and second planes parallel to each other and a device for inputting a coherent probe light...
5223355 Process for improving the signal-to-noise ratio in holography using bacteriorhodopsin-based recording media  
In processes of holography using bacteriorhodopsin-based recording media, it is essential to design the signal-to-noise ratio to be as favorable as possible. This is achieved by recording the...
5206674 System for the display of images given by a spatial modulator with transfer of energy  
A system for the display of images comprising: a spatial modulator of light receiving a first light beam and retransmitting a modulated beam; an energy transfer device receiving the modulated...
5202775 Radically symmetric hologram and method of fabricating the same  
A radially symmetric iterative discrete on-axis hologram has a high diffraction efficiency for a correspondingly small f-number. The radially symmetric hologram has a plurality of concentric...
5172251 Three dimensional display system  
A three dimensional display system includes a laser for generating a laser light signal. The signal is expanded and collimated using a traditional lens system and is directed to an acousto-optic...
5159498 Active mirror assembly  
A mirror and system for wavefront control includes a piezoelectrically active pellicle with a conductive front mirror surface, and an electron gun for depositing charge on the rear surface of the...
Matches 101 - 150 out of 217 < 1 2 3 4 5 >