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7229720 |
Hologram film having identification information recorded thereon and method for manufacturing the same
A simplified method is provided for recording identification information, such as a serial number or the like, in a hologram-recorded film simultaneously with hologram duplication. The method...
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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...
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6914918 |
Optical device, laser beam source, laser apparatus and method of producing optical device
After forming domain inverted layers 3 in an LiTaO 3 substrate 1 , an optical waveguide is formed. By performing low-temperature annealing for the optical wavelength conversion element thus...
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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...
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6809846 |
Optical switch and optical network
Disclosed is an optical switch for transmitting or shutting down an input light signal in accordance with a set switching state. The optical switch comprises first and second optical amplifiers...
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6613481 |
Hologram film having identification information recorded thereon and method for manufacturing the same
A simplified method is provided for recording identification information, such as a serial number or the like, in a hologram-recorded film simultaneously with hologram duplication. The method...
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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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6366368 |
Method and apparatus for forming hologram
The invention makes it possible to form a hologram for reproducing a three-dimensional image easily free of limitations placed by the size of the three-dimensional image to be reproduced, the size...
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6340540 |
Hologram recording sheet holographic optical element using said sheet and its production process
The hologram recording sheet according to the invention is made up of a base film and hologram sensitive materials sensitive to different wavelength regions formed therein in a desired pattern, or...
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6236475 |
Image recording method and apparatus and image reproducing method and apparatus
An image recording method and apparatus for recording an image on a holographic stereogram in such a manner as to generate an optimum reproduced image, and an image reproducing method and apparatus...
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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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6127066 |
Hologram recording sheet, holographic optical element using said sheet, and its production process
The hologram recording sheet according to the invention is made up of a base film and hologram sensitive materials sensitive to different wavelength regions formed therein in a desired pattern, or...
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5973807 |
Large display composite holograms and methods
A composite hologram comprises a plurality of hologram tiles arranged for display, each of said hologram tiles formed by exposing each of a plurality of different unexposed photographic plates...
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5856048 |
Information-recorded media and methods for reading the information
The invention is directed to an information-recorded medium with easily selectable and identifiable items of information, which is virtually protected against forgery and has enhanced security...
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5734485 |
Large display composite holograms and methods
A composite hologram incorporates a plurality of hologram tiles arranged for display, each of the hologram tiles formed by exposing each of a plurality of different unexposed photographic plates...
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5652666 |
Holographic 3-D display system with spatial light modulator
A method of using a display system having a spatial light modulator (14) to display holographic images. The spatial light modulator (14) generates images that represent vertical strips of a...
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5574579 |
Heads-up and heads-down displays employing holographic stereograms
055745798 Heads-up and heads-down displays employing holographic stereograms are provided. The stereograms can be oriented perpendicular to the user's line of sight (the "90° case") or at angle to...
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5309244 |
Image process apparatus with hologram lenses arranged in a concentric form or a spiral form
An image processing apparatus is provided to have a spatial light modulator onto and from which an image data is written and read, a digital reading system for digitally reading an image data...
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5260814 |
Production of full color stereographic holograms
A method and apparatus for producing temporally coherent, full color holograms is disclosed whereby a linear array of stereographically positioned cameras are simultaneously triggered to obtain a...
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5237433 |
Methods of hologram construction using computer-processed objects
Computer-processed or computer-generated objects can be used to build holograms whose images are close to or straddle the hologram surface. No preliminary or first hologram is required. The...
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5225918 |
Hologram scale, apparatus for making hologram scale, moving member having hologram scale assembled hologram scale and apparatus for making assembled hologram scale
An apparatus for making a hologram scale is comprised of a reference diffraction grating on which a light becomes incident and from or by which the incident light is emitted or reflected as a...
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5204770 |
All optical image processing and pattern recognition apparatus using stimulated photon echoes
An image processing apparatus having a third-order nonlinear stimulated photon echo medium (1). The photon echo medium (1) can store large numbers of images in the form of a Fourier transformed...
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5151799 |
System and technique for making holographic projection screens
A fast, accurate system for manufacturing holographic projection screens. The invention (10) includes a mechanism (28) for moving holographic film (26) along a longitudinal axis thereof in a first...
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5134504 |
Method and apparatus for producing full color stereographic holograms
A method and apparatus for producing temporally coherent, full color holograms is disclosed whereby a linear array of stereographically positioned cameras are simultaneously triggered to obtain a...
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5115335 |
Electrooptic fabry-perot pixels for phase-dominant spatial light modulators
Phase enhancement by resonant Fabry-Perot picture elements in III-V semiconductor spatial light modulators (SLMs) is disclosed. For 95% reflecting electrodes, a phase modulation of 0.7π rad is...
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5046792 |
Holographic printer
This invention is an optical printer that translates and records visual information that can be seen with ambient light in the first generation holographic printing. The invention permits recording...
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4595252 |
Hologram imaging system and recording method
An improved motion picture hologram imaging system and recording method is provided wherein the hologram film comprises a sequence of frames along the length of the film and wherein the frames are...
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4458981 |
Holographic movie device
A device is provided for recording and projecting holographic images. A laser illuminates a scene to be filmed and provides the spherical reference wave for recording the hologram on the film. The...
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4411489 |
System for synthesizing strip-multiplexed holograms
A system for synthesizing strip-multiplexed holograms, with or without coherent light, from a plurality of two-dimensional images. The two-dimensional images may be formed by a motion picture film...
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4337992 |
Hologram movie projection apparatus
A shutterless hologram movie apparatus using an incoherent (non-laser) light source in the viewing apparatus. Image immobilization and dispersion compensation are both accomplished with the same...
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4289372 |
Technique for recording a hologram suitable for use in optical retrieval system
A hologram recording system useful for recording holograms for use on a film strip tape in an optical retreival system is disclosed. The recording system permits accurate centering of a selected...
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4239326 |
Holographic scanner for reconstructing a scanning light spot insensitive to a mechanical wobble
A holographic spinner reconstructs a light spot to rapidly scan a narrow line on a suitable "write" surface to generate an image. The geometry of the holographic spinner with respect to the...
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4224480 |
Holographic playback system using a charge storage sensor and binary decoding
A holographic playback system comprises a turntable adapted to support a record disk which contains a series of holograms recorded along convoluted spiral tracks. Each of the holograms represents a...
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4175823 |
Process for holographic recording of data in the form of electrical signals
A process of recording information which is in the form of electrical signals by pulse amplitude modulating an object wave and directing it with a reference wave onto a moving light-sensitive...
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4135251 |
Method for coded sequential non-coherent, redundant optical data-storage
A method for coded, sequential, non-coherent, redundant, optical data storage wherein a number of one-dimensional holograms is recorded in a timed succession upon a light-sensitive tape through the...
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4108367 |
Token and reader for vending machines
A token for use in a vending machine consists of a plastic card having at least one pair of side-by-side holograms embossed thereon. A token reader includes means to guide a token into the path of...
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4084153 |
Apparatus for reconstructing a binary bit pattern
A binary bit pattern is reconstructed from a block of analog signals corresponding to the number of known bit positions of the pattern being reconstructed. The analog signals, which may take the...
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4036552 |
Retroreflective material made by recording a plurality of light interference fringe patterns
Retroreflective material including a medium containing a plurality of diffraction elements comprising light interference fringe patterns for enabling provision of a retroreflective effect upon...
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4012108 |
Hologram memory apparatus
A hologram memory apparatus in which the information is displayed as one-dimensional spatial pattern and recorded in a form of strip-shaped one-dimensional hologram having sharpness in counter...
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3984802 |
Feature recognition system
9. A feature recognition system for identifying an unknown signal source, mprising: First means for receiving a signal from the unknown signal source and producing a hologram thereof; Second...
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3976354 |
Holographic memory with moving memory medium
In a holographic memory or a holographic recording system, one dimensional Fourier transform holograms are recorded on a moving memory medium. The one dimensional Fourier transform holograms have...
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3958860 |
Holographic object recognition trainer
Apparatus and method for the visual display of an object, such as an aircraft, at continuously variable attitudes comprising two hologram films of the object made in wrap-around 360° fashion on...
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3949191 |
Data storage and retrieval system
Data is recorded in holographic form on elongate film strips in a plurality of parallel, longitudinally extending hologram rows. The film is longitudinally moved past a light beam to reconstruct...
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3947640 |
Method and device for recording data as holograms in a multi-channel storage tape
A method and apparatus for recording data in parallel extending information channels or tracks on a storage tape characterized by the object beam and reference beam being commonly and sequentially...
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3944321 |
Recording unidimensional holograms with reduced positional sensitivity during readout
An arrangement for effecting holographic recording of information occurring in the form of electrical signals, wherein a coherent object wave which has been pulse modulated by an electrical signal...
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3937555 |
Holographic motion picture camera with doppler shift compensation
A holographic motion picture camera for producing three dimensional images employing an elliptical optical system and where there is provided in one of the beam paths (the object or reference beam...
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3915551 |
Holographic systems using partially overlapping hologram record
This invention is concerned with methods and apparatus for recording multiple exposure holograms on a film record and displaying reconstructed images of the separately recorded subjects. Means are...
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3914544 |
Apparatus for halographically recording and reproducing picture images on a disc
Images originally recorded on, for example, a film frame, a television frame or a field are arranged as holograms on a holographic recording body. An apparatus for holographically recording and...
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3911598 |
Laser type weapon fire simulation system
A laser type weapon fire simulation system in which a laser type weapon simulator capable of producing a laser beam when fired is combined with a holographic means capable of producing a three...
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3905674 |
Apparatus for producing one-dimensional holograms
An apparatus for sequentially recording extremely narrow, one-dimensional holograms on a moving storage tape by directing an object wave and a source symmetrical reference wave from a coherent...
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