Matches 151 - 200 out of 217 < 1 2 3 4 5 >
Match Document Document Title
5159473 Apparatus and method for programmable optical interconnections  
A programmable optical interconnection apparatus and method in which a plurality of spatial light modulators (SLM) form a plurality of spatially modulated beams from a data signal. A hologram is...
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...
5151724 Dynamic holographic display with cantilever  
A dynamic holographic display has an array of reflective surfaces formed on cantilever structures substantially parallel to the surface of a substrate, such as a silicon wafer. A holographic image...
5132813 Neural processor with holographic optical paths and nonlinear operating means  
An optical apparatus for simulating a highly interconnected neural network is disclosed as including a spatial light modulator (SLM), an inputting device, a laser, a detecting device, and a...
5129041 Optical neural network processing element with multiple holographic element interconnects  
A neural network processing element uses primarily optical components to model a biological neuron having both spatial and temporal dependence. The neural network processing element includes a...
5111312 Coupling mechanism for efficient conversion of axisymmetric beam profiles into profiles suitable for diffraction-free transmission in free space  
Novel designs for efficient coupling mechanism for the conversion of typical profile laser beams into J o -profile beams are presented. Several specific embodiments are provided which employ...
5107351 Image enhanced optical correlator system  
An image enhanced optical correlator system providing for optical preprocessing of an input image prior to processing thereof in an optical correlator. The optical preprocessing is provided to...
5098176 Apparatus for recording plural holographic images into a holographic recording material by temporal interleaving  
A control arrangement for a galvanometer driven mirror whereby the angle of incidence of a beam on a holographic recording material is controlled includes a laser source and associated detector....
5064257 Optical heterodyne scanning type holography device  
There is disclosed an optical heterodyne scanning holography device capable of recording and reconstructing a holographic image of an object in real time by optical heterodyne-scanning the object,...
5062693 All-optical photochromic spatial light modulators based on photoinduced electron transfer in rigid matrices  
A single material (not a multi-element structure) spatial light modulator (50) may be written to (30), as well as read out from (80), using light (20). The device has tailorable rise and hold times...
5029220 Optical joint correlator for real-time image tracking and retinal surgery  
A method for tracking an object in a sequence of images is described. Such sequence of images may, for example, be a sequence of television frames. The object in the current frame is correlated...
5007690 Holographic data storage and retrieval system  
A plurality of reflective diffusing holographic memory elements (16) is positioned on a memory plate (14). An array (24) of detectors (22) faces at least one of the memory elements. A laser (26)...
4965603 Optical beamforming network for controlling an RF phased array  
An optical beamforming network is provided for controlling the RF radiation pattern of a phased array antenna. Light from a first laser is modulated by a spatial light modulator that is...
4961615 Associative memory system with spatial light modulator  
An associative memory system is provided which incorporates a spatial light modulator (SLM) and thresholding components. In the preferred embodiment, a Fourier transform hologram is used to...
4952010 Optical space switch  
An optical space switch is used in a centralized switching system for an optical network and connects light from one of a number of inputs (1) to a selected one of a number of outputs (6). The...
4900128 Three dimensional binocular correlator  
A three dimensional binocular correlator is disclosed in which additive/differential discrimination can be provided by combining and comparing two optical inputs of different aspect angular views...
4877297 Reconfigurable 0ptical interconnect using dynamic hologram  
A beam of coherent light is coupled into an array of light detectors using a beam splitter for dividing the beam into a probe beam and a pump beam and a spatial light modulator for varying the...
4859548 Method for generating a lattice structure with a phase shift on the surface of a substrate  
A method for generating a lattice structure with a phase shift on a surface of a substrate characterized by the steps of exposing of a photo-sensitive surface in an optical interference field and...
4836658 Optical devices for forming image and reference beams with a polarizing beamsplitter and a spatial light modulator  
An optical device for use in forming a holographic record, comprising a polarizing beam splitter and a spatial light modulator arranged to derive from an incident beam a focussed image beam and a...
4719160 Method and apparatus for making white light holograms  
A method of making a white light hologram is disclosed. A diffraction grating is placed in contact with a film emulsion to provide a reference and object beam from the same light source.
4603937 Holography  
A method of producing a holograph of a large object, for example, a building, in which a photographic transparency of the building is taken and laser light passed through the transparency to...
4597630 Self-derived reference beam holography using a dove prism  
A method and associated system for providing interference patterns generated from light, including visible, ultraviolet and infrared, carrying desired information comprises the steps of and...
4223975 Aberration correction of magnified holographic images  
In the process of reconstruction of a virtual image of a light line having one end disposed at infinity with respect to the observer from a hologram of a shorter light line by shifting the position...
4150781 Access authentication system  
This invention describes a system for access control, wherein a control card is presented to a control means. If the control card is authenticated, then access is gained. If it is not...
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...
4120569 Method and apparatus for the holographic storage and retrieval  
A process and apparatus is disclosed for imposing selectable, sequential, spatial modulations upon a reference beam for the storage in a suitable medium of a hologram. Changing the spatial...
4062618 Secure optical multiplex communication system  
The communication system includes a holographic system to provide a plurality of spatially multiplexed optical beams each modulated by a different one of a plurality of binary intelligence signals....
4018503 Holographic systems having reference beam coded holograms  
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...
3985975 Holographic telephone switching system  
A matrix of electrical to light converting diodes are each coupled to different ones of a plurality of incoming telephone lines. These diodes emit light at all times and have their light intensity...
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...
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...
3867009 Holographic microscope with suppression of coherent noise  
The invention relates to a holographic microscope with suppression of coherent noise, appropriated for recording and reconstruction of holograms, and for interferometric investigations.
3854791 HOLOGRAPHIC MEMORY WITH RANDOM PHASE ILLUMINATION HOLOGRAM  
A memory system wherein information consisting of a plurality of elements such as letters, circular holes, figures, and the like is represented as Fourier transforms, which are, in turn, recorded...
3848096 METHOD OF AND MEANS FOR HOLOGRAPHICALLY RECORDING AND REPRODUCING INFORMATION  
A photographic surface is illuminated by coherent monochromatic light from a point source of radiation, such as a laser, which emits a pulsed beam modulated in phase and/or intensity according to...
3778130 HOLOGRAM FORMATION WITH A SPECKLE REFERENCE POINT SOURCE  
Disclosed are hologram systems in which the necessary degree of vibration isolation of the object being recorded is substantially less than is required in conventional holographic systems. A source...
3778128 GATED HOLOGRAPHIC CODING SYSTEM FOR REDUCING ALIGNMENT REQUIREMENTS  
Holographic techniques are used to encode and decode information. The image of a point source of light is used to trigger an image sensor into detecting the decoded information when the relative...
3764979 HOLOGRAPHIC SYSTEM FOR SUBJECT RECOGNITION PERMITTING CONVERSION OF A PATTERN INTO A MACHINE-READABLE FORM  
A holographic device for producing output image patterns in response to different input pattern wavefronts is described. A novel hologram is formed by the interference of a first pattern of...
3754807 PHASE MODULATION HOLOGRAPHIC DATA RECORDING APPARATUS  
A holographic apparatus for recording digital data comprising a recording medium and means for producing coherently related reference and signal beams in combination with a plurality of phase...
3744871 HOLOGRAPHIC MEMORY SYSTEM FOR RECORDING DIGITAL INFORMATION  
A memory system wherein information is represented as Fourier transforms, which are in turn recorded on a recording medium such as a photographic film with a high packing density by a holographic...
3711177 APPARATUS FOR MAKING AND RECONSTRUCTING REFERENCE BEAM CODED HOLOGRAMS  
An apparatus for making and reconstructing a reference beam coded hologram. A source beam of partially coherent light is amplitude divided into separate angularly displaced reference and object...
3704929 LARGE CAPACITY ASSOCIATIVE MEMORY EMPLOYING HOLOGRAPHY  
A large capacity associative memory of the holographic type. Coded information uniquely identifying first data and in the form of spatially modulated coherent light rays, forms an interference...
3658404 COMPLEX WAVE MODIFYING STRUCTURE HOLOGRAPHIC SYSTEM  
The use of a particular complex wave modifying structure for making a special type of hologram. This structure, which works on the principles of optics, in the preferred embodiments can be a...
3658403 HIGH FIDELITY READOUT OF A HOLOGRAM PERFORMING THE FUNCTION OF A COMPLEX WAVE MODIFYING STRUCTURE  
The method of reading out the type of hologram which results from the simultaneous recording on a recording medium surface of first and second components of coherent wave energy, wherein the first...
3652144 AMPLITUDE WEIGHTING IN HOLOGRAPHY  
Holographic system in which the signal (object) beam, the reference beam, or the readout beam is weighted (i.e., shaped) in amplitude as a function of the spatial coordinates of the hologram plane....
3647275 IDENTIFICATION SYSTEM USING REFERENCE BEAM CODED HOLOGRAMS  
An identification system for identifying persons, articles, documents and the like using a coded hologram which contains the desired identifying indicia in coded holographic form. Encoding of the...
3633986 HOLOGRAPHIC RECORDING SYSTEM WITH A SEPARATELY RECORDED REFERENCE BEAM  
For rapidly constructing holograms with pulsed light issued for example from a pulsed laser the light used to form a normal hologram is also used to form a second hologram by illuminating a second...
3630593 HOLOGRAPHICALLY PRODUCED IMAGE ARRAYS FOR PHOTOLITHOGRAPHY  
This disclosure describes the generation of multiple identical images holographically. Wavefronts from a unit pattern and a pinhole array separately illuminated by branched, spatially filtered and...
3627401 BINARY-CODED HOLOGRAM RECORDING SYSTEM  
The invention relates to an information storage system in which the basic storage element is a hologram. Information is recorded (or written) by selectively orienting the plane of polarization of...
3623798 BLAZED HOLOGRAM FABRICATION  
Production of a modified blazed hologram is disclosed that will exhibit a single-wavelength image when illuminated by a white, i.e., multiwavelength light source. One embodiment includes coating a...
3614191 ASSOCIATIVE MEMORY EMPLOYING HOLOGRAPHY  
An associative memory employing holographic techniques. During read-in first and second space modulated beams are each split into true and complementary groups of binary modulated beams. The...
Matches 151 - 200 out of 217 < 1 2 3 4 5 >