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7236277 Holographic recording medium and holographic recording method using the same  
A holographic recording medium has at least a recording layer with a thickness of L which comprises a recording layer material having an absorption coefficient of α and containing a...
7227674 Active digital hologram display  
Certain types of holographic recording materials can be used to updateably record holographic stereograms formed when fringe patterns are generated through interference of an object laser beam...
7170661 Hologram recording medium and recording and reproducing system  
A hologram recording medium is a hologram recording medium which is irradiated with light for recording information therein or reproducing information therefrom. The hologram recording medium has a...
7136205 Volume-phase holographic diffraction grating optimized for the ultraviolet spectral region  
A volume-phase holographic diffraction grating device is provided that can be optimized for use with very short wavelength light, such as light in the ultraviolet (UV) spectral region. The device...
7102802 Methods for storing holographic data and articles having enhanced data storage lifetime derived therefrom  
The present invention provides a method for storing holographic data comprising providing an optically transparent substrate comprising a photochemically active dye; irradiating the optically...
6859293 Active digital hologram display  
Certain types of holographic recording materials can be used to updateably record holographic stereograms formed when fringe patterns are generated through interference of an object laser beam...
6761999 Nondegenerate four-wave mixing using photoinduced charge-transfer materials  
Charge-transfer materials are demonstrated to be useful for generating femtosecond holographic gratings. Using semiconducting polymers sensitized with varying concentrations of C 60 , absorption...
6710901 Method and apparatus for two-photon, volumetric spatially resolved holographic data storage in photosensitive glass  
A method for the generation of volume spatially-resolved holographic data storage within a photosensitive glass sample that incurs changes of optical properties in response to two-photon...
6687030 Method and apparatus for illuminating a display  
Disclosed is a device for producing colored light and an image generating apparatus including such a device. The device includes a switchable light-directing apparatus configured to receive light...
6558851 Optical medium for registration of holographic interferograms  
This invention relates to the photo-sensitive thermoplastic top-layer of optical media for registration of holograms, where the media consists of three transparent layers where the bottom layer is...
6504629 Method and apparatus for illuminating a display  
Disclosed is a device for producing colored light and an image generating apparatus including such a device. The device includes a switchable light-directing apparatus configured to receive light...
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...
6373603 Image generating system including compensation for chromatic dispersion  
A system and method for generating a system are disclosed. The system includes a display device comprising a plurality of display regions, each region configured for displaying a color component of...
6323970 Method of producing switchable holograms  
A method of producing a switchable hologram generally comprises providing a substrate comprised of a liquid crystal material and having two generally opposed surfaces and recording a plurality of...
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...
6301027 Holographic desktop monitor  
A projection monitor and a method of displaying an output image on a viewing screen of the monitor utilize a number of reconfigurable holographic optical elements (HOEs), allowing the components of...
6281994 Method and apparatus for three-dimensional holographic display suitable for video image display  
A method and an apparatus for three-dimensional holographic display suitable for moving object display are disclosed. At least one hologram of a display target object is displayed on a display...
6175431 Projection systems based on reconfigurable holographic optics  
A projection system and a method of displaying a projected input image on a projection screen of the system utilize one or more reconfigurable holographic optical elements (HOEs) to optically...
6115151 Method for producing a multi-layer holographic device  
A method of making a holographic device comprising sensitizing a plurality of layers and stacking the layers to form a composite structure. Each layer is sensitized to at least one color...
6046830 Dynamic refresh for optical data storage  
A method for dynamically refreshing a holographic data storage medium wherein data is stored in a plurality of data pages, each of which comprises a two dimensional pattern of pixel data. Each data...
6040928 Holographic desktop monitor  
A projection monitor and a method of displaying an output image on a viewing screen of the monitor utilize a number of reconfigurable holographic optical elements (HOEs), allowing the components of...
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...
5847851 Double-doped BaTiO.sub.3 crystal for holographic storage  
A new photorefractive material comprises BaTiO 3 double-doped with two dopant species, both of which have at least two valence states, with one of the dopant species (e.g., cerium) having an...
5796498 Holographic imaging  
A holographic imaging apparatus having a pulsed laser light source for generating an object beam and a reference beam whereby an object, obscured by a diffusing medium, is illuminated by the object...
5744267 Azo-dye-doped photorefractive polymer composites for holographic testing and image processing  
A photorefractive (PR) device comprises of a layer of a novel photorefractive polymer composite sandwiched inbetween two transparent electrodes. The PR polymer composite comprises a photoconducting...
5719690 Photorefractive glass article  
The invention relates to a photorefractive article for the transmission of radiation comprising an optical chromophore, a charge transport agent and a nonpolymeric organic glass matrix.
5675436 Optical image processor employing a nonlinear medium with active gain  
An optical image processor includes a nonlinear active gain medium for recording an interference pattern that corresponds to the Fourier transform of an input image or the multiplicative product of...
5668647 Method and apparatus and for processing ultrafast optical signals  
An apparatus and method are disclosed for providing holographic matched filters for application in all-optical holographic processing of ultrahigh-speed optical data. A scaled spatial image of...
5629782 Holographic display apparatus  
A holographic display apparatus has a display section including a back plate, on which a cold cathode device of the field emission type having a great number of fine emitter electrodes is arranged....
5559613 Photorefractive device with quantum wells  
A photorefractive device intended to be exposed to a marking radiation which is provided so as to create a grating of interference fringes in the device and to a reading radiation diffracted by the...
5528389 Optical holographic system for parallel to serial and serial to parallel conversion of optical data  
A serial-to-parallel and parallel-to-serial conversion apparatus and method are disclosed to convert optical pulse data into temporally multiplexed ultra-fast optical pulses, and vice versa, using...
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...
5361222 Binary phase only filter associative memory  
An associative memory apparatus having a 2f Fourier transform optical correlation configuration wherein the correlation spots produced in the correlation plane are projected back by a mirror...
5361148 Apparatus for photorefractive two beam coupling  
The present invention relates to an improved process for producing photorefractive net gain two beam coupling utilizing polymeric materials.
5313315 Method of imaging through a scattering medium using coherent light  
In a conventional hologram, a photographic film records the interference pattern of monochromatic light, scattered from an object (20) to be imaged, with a reference beam of unscattered light....
5305123 Light controlled spatial and angular electromagnetic wave modulator  
A 2D/3D optically controlled spatial and angular electromagnetic wave modulator is disclosed. The modulator of the present invention modulates the amplitude and direction of an electromagnetic wave...
5283672 Holographic techniques for generating high resolution telescopic images  
Holographic apparatus and methods are provided for generating high resolution telescopic images using low cost, small aperture lenses. Holographic media, such as photorefractive crystals, are used...
5282067 Self-amplified optical pattern recognition system  
A self amplifying optical pattern recognizer includes a geometric system configuration similar to that of a Vander Lugt holographic matched filter configuration with a photorefractive crystal...
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)...
5245448 Apparatus for producing a moving 3-dimensional image  
A moving holographic image is projected into three space by producing a series of slides or fixed holographic images in quick succession in a process similar to a conventional motion picture All of...
5121231 Incoherent/coherent multiplexed holographic recording for photonic interconnections and holographic optical elements  
The present invention relates to a novel architecture and associated apparatus for the development of highly multiplexed photonic interconnection networks and holographic optical elements with...
5064264 Photorefractive materials  
The present invention relates to polymeric materials that exhibit an erasable photorefractive effect which can be fabricated into optical devices such as optical wave guides.
5028102 Parallel optical information processing system  
A parallel optical information processing system includes an information inputting part which produces a coherent optical beam spatially modulated by input image information. A rewritable hologram...
5004325 Optical processing using a multilayer heterostructure  
An electro-optic medium, useful for image processing, is formed by creating a distribution of deep impurity levels over essentially all the lateral extent of a multilayer heterostructure. This...
4783134 Microwave holograph device  
In a microwave holographic device, the main lobe of a microwave antenna is spatially scanned to receive a microwave signal reflected from an object. The received microwave signal is mixed with a...
4683371 Dual stripe optical data card  
An optical data card having a pair of spaced apart information strips. One strip has pre-recorded programs or data and is always a non-erasable strip. This strip may be either a reflective...
4673241 Diffraction gratings and optical branching filter elements  
An optical branching filter element comprised of a substrate having a wave guide thereon of a material capable of reversibly changing its refractive index and an erasable diffraction grating formed...
4484219 Electronically generated holography  
Holographic data in the form of electronic signals is generated through the utilization of two planar transparent supports between which is positioned an electro-optical dipolar medium which is...
4420217 Switchable on-axis optical bandstop filter  
An optical filter is formed by exposing a photosensitive material to direct nd retroreflected coherent optical radiation. These radiations set up standing waves in the material such that, when the...
4352566 Detection of birefringence in irregularly shaped objects  
An apparatus utilizing four-wave degenerate mixing detects birefringence in irregularly shaped objects (6). Laser radiation (120) having a specified polarization is brought to a focus and then sent...
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