Matches 351 - 400 out of 438 < 1 2 3 4 5 6 7 8 9 >
Match Document Document Title
4832424 White-light viewable, cylindrical holograms and method of spatially filtering wavefronts  
A white-light viewable, cylindrical hologram is made by recording on a cylindrical recording medium the interference between a radial reference beam and an object wavefront emanating from the...
4824192 Optical processing  
An optical processor includes a non-linear spatial light modulator defining an array of logic gates and having an output plane 10 ) and an input plane 12. The array is made up of a plurality of...
4792196 Internal structure holography  
A method and apparatus are provided for the holographic examination of the internal features of cavities and passageways of a structure. The apparatus employs a laser beam source positioned...
4737001 Holographic indicator for determining vehicle perimeter  
A holographic indicator for determining a vehicle perimeter location is provided. A substantially transparent hologram member can be fixed to either the windshield or the rear window and contains a...
4727007 Holographic devices employing metallic charge-transfer salts  
Metallic salts of organic charge-transfer agents, such as TCNQ, TNAP, TCNE and DDQ and their derivatives, can be processed by an electron beam for a variety of useful electronic and optical...
4720158 Method of and apparatus for making a hologram  
In a method of making a hologram by causing a plurality of light beams to interfere with one another, a new hologram is made by the use of the reproduced lights from a plurality of holograms made...
4703994 System and method for automatically fabricating multi-hologram optical elements  
A system and method for automatically fabricating multi-hologram optical elements. Signal and reference beams are formed and directed along separate paths that intersect at a recording medium; and...
4547037 Holographic method for producing desired wavefront transformations  
The method utilizes a multi-faceted holographic optical element, the various individual diffraction gratings of each facet collectively functioning to effect a desired wavefront transformation. In...
4510575 Method for writing holograms  
A micro graphic representation such as a hologram is formed by directing from a computer to a display surface signals to form a very small portion of the graphic representation of the display...
4455061 Multi-faceted holographic optical element and methods of making and using same  
A holographic optical element is formed by subdividing the surface of a relatively thick dichromated gelatin film into numerous small areas so as to provide a corresponding number of volume facets...
4451114 Method for recording and reconstructing pulse laser holograms in color  
A method for recording and reconstructing a hologram recorded with two pulse laser beams having different wavelengths in order to increase the illuminance of the reconstructed image recorded in one...
4429946 Method and system for constructing a composite hologram  
Techniques for making individual narrow lenticular holograms for a composite drum shaped hologram wherein the vertical and horizontal aspects of an object beam and of an image therein are optically...
4394063 Device for reconstructing layer images of a three-dimensional object by means of an adjustable imaging matrix  
A device for imaging layers of the interior of a three-dimensional object. The object is irradiated from a large number of radiation source positions which are distributed in one plane from this, a...
4336976 Holographic storage of terrain data  
A method and apparatus for the holographic storage of terrain data on a hgraphic recording material. The holographic storage apparatus includes a camera, positioned above a terrain surface, for...
4312559 Method of producing an inline hologram lens  
An inline hologram lens suitable for use in an optical reproducing head is formed by first preparing a mother off-axis hologram lens by exposing a photo-sensitive layer to a subject wave beam and...
4214807 Holographic optical satellite communication system  
In a satellite communication system using optical carriers the down link radiation beam pattern is limited to illuminating only the receiver sites for power economy. The transmitting laser's beam...
4213193 Holographic data storage systems  
A holographic data storage system for the storage and retrieval of data which includes in combination input means adapted to produce a number of coherent beams; wavefront matching means comprising...
4159417 Electronic book  
The contents of a book, magazine or the like are digitally encoded onto a memory, and the memory is removably insertable into a portable book-like apparatus whereby the encoded information can be...
4156555 Apparatus and method for providing unblurred images with a continuously scanned light beam  
An apparatus and method is disclosed for utilizing a low power light source in conjunction with a continuously scanned light beam deflector to form unblurred images of a vocabulary of characters at...
4142773 Method for transmitting two-dimensional information and system for effecting same  
A method is disclosed for transmitting two-dimensional information about an object with the aid of a two-dimensional reference signal and a two-dimensional useful signal through an optical...
4138189 Holography using a Bi.sub.12 SiO or Bi.sub.12 GeO.sub.20 recording medium  
A holographic storage cell for storing volume holograms wherein a plate of either Bi 12 SiO 20 or Bi 12 GeO 20 is provided with electrodes producing an electric field transversed to the plate....
4103214 Error cancelling sync-off-tach tape drive system  
A holographic recording is made on a tone wheel which is arranged to be driven by a capstan motor and capstan assembly. The holographic recording is a series of radial holograms on the tone wheel...
4067638 Multi-color holographic stereograms  
A plurality of multicolored transparencies or pictures having different parallactic views of a scene are aligned with each other and illuminated by red, green, and blue coherent beams. The...
4054357 Providing a representation of information stored in a hologram  
A holographic recording of a plurality of rows of informational elements, which may represent a binary number, is successively illuminated by each of a plurality of light sources, where the number...
4052706 System for reading an optical recording of binary numerical data  
The invention has for its object a reading arrangement which uses a source functioning by pulses and delay-action dividing optical means which successively ensure the illumination of M storage...
4039245 Method for preparing a hologram  
A hologram is produced by arranging a plurality of two-dimensional pictures in a predetermined pattern, illuminating each of the two-dimensional pictures with a coherent beam, projecting light...
4021606 Hologram apparatus  
A hologram apparatus comprises a rotary plane with a plurality of holograms concentrically or spirally arranged thereon, a light emitting source, and at least one photodetector for reading out...
4017158 Spatial frequency carrier and process of preparing same  
A transparency for reproducing preselected area delineations in colors and intensities thereof variable at will is formed by using an interference pattern formed holographically by the interference...
4014603 Method of holographic recording  
Disclosed are a method and apparatus for holographically recording a plurality of holograms on a recording material. The method comprises producing two coherent light beams, altering one of these...
4007481 Holographic color television record  
A method and apparatus for constructing and relaying an optical holographic record containing a plurality of very small holograms, each of which contains color information independent of the other...
4001874 Method apparatus and record for distributing information in the form of color images  
Three superimposed microholograms, corresponding respectively to the luminance, red chrominance and blue chrominance images, are recorded in respect of each color image. At the time of read-out,...
3989347 Acousto-optical data input transducer with optical data storage and process for operation thereof  
The present invention is directed to the improvements in an apparatus for holographically recording data on a storage medium with the data being block-organized holographic data by spatially...
3987421 Halographic process for the real-time storage and retrieval of high speed digitally encoded information and an apparatus for implementing said process  
The process consists in splitting the information into N groups of M bits, in recording the groups on N parallel tracks on the carrier, in the form of M holograms differentiated from each other by...
3975081 Signal recording system  
An optical recording system for holographically recording one-dimensional information varying with time such as audio signals.
3970357 Apparatus for holographic recording  
Disclosed are a method and apparatus for holographically recording a plurality of holograms on a recording material. The method comprises producing two coherent light beams, altering one of these...
3946430 Multiple recording system for video signals and optical images  
A multiplexed holographic recording system employs plural transparent positive pictures, each representing a different pictorial or video information content, which embody differing, unique...
3936139 Holographic memory providing both angular and translational reference beam deflections  
An optical system for the high density storage and retrieving of data, based upon the holographic recording technique, and incorporating two light deviating devices. The first of said devices...
3924924 Holographic memory utilizing a changeable phase object and coherent subtraction  
A pattern generating device includes a plurality of biaxial birefringent irregular ferroelectric crystal elements, each crystal being cut such that mutually opposing planes are normal to any one of...
3922061 Optical storage apparatus and process  
Holographic apparatus utilizes a multiphoton process for writing and single photon for reading. Dependence upon a virtual first photon absorption rather than an actual absorption for the...
3914056 Apparatus for evaluating holographically reconstructed wave fields with two frequencies  
Apparatus for evaluating the reconstruction of holographically recorded wave fields wherein the same spatial arrangement of the reconstructing apparatus with respect to the recording medium and the...
3912391 Optical information storage and retrieval system with optical storage medium  
Storage of information is performed by interference effects in depth in an optically accessible information storage unit. The storage unit is divisible into a plurality of individual information...
3905019 Pattern recognizing optical apparatus  
A pattern recognizing apparatus having a spatial filter manufactured by exposing a surface of a hologram dry plate to a pair of light beams simultaneously directed to a point on the hologram dry...
3900884 Holographic color television record system  
A method and apparatus for constructing and replaying an optical holographic record containing a plurality of very small holograms, each of which contains color information independent of the other...
3899240 Method for distinguishing similar subjects using discriminating holograms  
A method for making a discriminating hologram which can be used to distinguish similar subjects, and a method for distinguising these similar subjects using the discriminating hologram. The...
3891976 Hologram memory with sequential data storage and beam angular relationship  
A holographic data processing apparatus is described wherein data is holographically recorded on a recording medium with the data arranged in groups of superimposed holograms of data bits. An...
3889233 Character coincidence detector for optical information retrieval systems  
In an optical information retrieval system, the method of detecting the coincidence between an information to be retrieved that has been stored as a hologram and an interrogation information,...
3887276 Rapidly accessible optically stored information  
Address information is optically stored in the form of Fraunhofer holograms n successive frames of a film. During search, while any part of the Fraunhofer hologram of a rapidly moving frame is in...
3885143 Optical information retrieval apparatus  
An optical information retrieval apparatus which utilizes the correlation detection function of a hologram to check coincidence matching between an interrogation signal and information recorded in...
3883216 Holographic memory having spherical recording medium  
In a holographic memory, a substantially constant angle is maintained between the object beam and the reference beam at the memory medium. The object beam is pivoted about an object beam pivot...
3858239 COLOR ENCODED HOLOGRAM PLAYBACK APPARATUS  
A hologram record is made containing information representative of the color and brightness of a scene. A replica of the hologram is played back in a system including a laser imaging unit for...
Matches 351 - 400 out of 438 < 1 2 3 4 5 6 7 8 9 >