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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...
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5235461 |
Optical encoding and correlation system
An optical correlator system for encoding a complex optical image onto a erent beam of light such as a laser and comparing it with a reference complex image. One embodiment of the invention encodes...
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5235439 |
Volume-holographic inner product processor
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...
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5233554 |
Programmable optical correlator
An optical correlation system employing the degenerate four wave mixing uses cross-polarized pump and probe beams to prevent the writing of a volume transmission phase hologram in a photorefractive...
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5220622 |
Data base searching
A holographic optical correlator includes a matched optical filter and control means therefor including a memory. In use searching for occurrences of an item to be found is carried out by the...
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5220643 |
Monolithic neural network element
A neural plane, which can form the basis of a neural network or a component thereof, is comprised by an optical modulator, an electrical non-linearity circuit and an optical detector interconnected...
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5220642 |
Optical neurocomputer with dynamic weight matrix
An optical computer for performing product and/or sum operations on input vector information and matrix information includes an array of light emitting elements, the array having a plurality of...
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5214534 |
Coding intensity images as phase-only images for use in an optical correlator
A method of performing image correlation in a Fourier transform correlator utilizes phase-encoding of the input image as a phase object with a normalized amplitude component. Phase-only reference...
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5208685 |
Compact optical processor
This invention is a compact optical processor including a coherent light source, plural optical elements that together form a Fourier transform interferometer, and a two dimensional detector array....
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5187598 |
Optical processor for pulse train identification
A pulse train in the presence of random noise and other pulse trains is identified by controlling pixels in a raster display in accordance with incoming signals; using the raster display to...
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5185715 |
Data processing systems and methods for linear programming
Data processing systems are described for processing linear programming problems. The invention employs optical (100) or digital (150) processors to perform Gaussian pivot operations by performing...
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5175775 |
Optical pattern recognition using multiple reference images
An optical pattern recognition method which can be applied to a joint transform correlator operative to effect correlation processing between a plurality of reference images and at least a single...
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5173790 |
Adaptive filter with correlation weighting structure
An adaptive filter having a correlation weighting structue having a single Bragg cell, acting as a tapped delay line and having an input and an output, the Bragg cell intensity modulating a write...
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5157784 |
Memory control system responsive to determination, allocating adjacent test space for editing space, relocating adjacent text and editing selected text
A memory control unit comprising: a first memory for storing a plurality of text information; a second memory for storing title information to segment those text information stored in the first...
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5155606 |
Glint suppression technique
Glints (e.g., images of point sources attributable to specular reflections) are suppressed in the focal plane of an optical imaging system by: a) Fourier-transforming an image of the imaging...
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5155779 |
Optical circulating shift register
An all-optical circulating shift register encodes a received optical clock signal with a value derived from an encoded optical signal received at a control port thereof. A data input to the shift...
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5151822 |
Transform digital/optical processing system including wedge/ring accumulator
A transform digital optical processing system generates a transform signal of an image. Fourier or other well-known transforms may be employed. The transform signal may be generated in one of two...
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5150229 |
Optical correlator
An optical correlator according to the present invention generates a cross-correlation peak of two patterns of pictorial information to be compared. It generates pictorial patterns of a sum of the...
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5148316 |
Averaged amplitude encoded phase-only filters for use in Fourier transform optical correlators
Method of producing an averaged amplitude mask, for use in conjunction with a phase only filter (pOF) to provide an averaged amplitude matched filter (AAMF) in a Fourier transform optical...
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5148496 |
Optical correlator with symmetric reflective optics
A discoid optical correlator system having a plurality of reflective optical components, a source of electromagnetic radiation, such as visible light, and an output detector which are positioned...
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5138489 |
Spatially incoherent holographic correlator
An incoherent holographic correlator comprising a two-dimensional array of surface-emitting lasers which are selectable in an arbitrary pattern so as to emit a beam containing the pattern. The...
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5136532 |
Coherent signal processing device using an optical delay line and application thereof to filtering correlation product and spectral analysis
A coherent signal processing device is provided using a monomode optical fiber as delay line, comprising a source and a ring interferometer with a bidirectional coupler and a monomode optical fiber...
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5132842 |
Optical image transformation system
An optical system is provided for the transformation of input images to be correlated by a pattern recognition system. A pulse of light from a laser carries an input image to a beam splitter. The...
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5132831 |
Analog optical processing for the construction of fractal objects
An analog optical processor for performing affine transformations and constructing fractal objects. An optical processor for optically performing an iterated affine transformation includes a...
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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...
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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...
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5124842 |
Image input/output apparatus
An image input/output apparatus which can reproduce an image having a large focal depth, without decreasing the resolution and luminance. The apparatus has a wide range of practical applications,...
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5121248 |
Acousto-optic time-integrating signal processor
An acousto-optic correlator for wideband signals. The invention is defined by and relates to device in which a laser beam is split into two paths of a Mach-Zehnder interferometer arrangement. A...
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5121228 |
Holographic learning machine
A holographic learning machine comprising a volume holographic recording medium, 2N photo-detectors receiving light diffracted from the medium, and N electrical circuits subtracting respective...
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5119443 |
Nonlinear joint transform optical correlator having varying degrees of nonlinearity
In a nonlinear joint transform image correlator, the Fourier transform interference intensity is nonlinearly transformed to provide higher correlation peak intensity and a better defined...
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5105380 |
Electro-optic channelized modulator and receiver
A wideband electrical input signal is applied to a tapped delay line to produce a spatial representation of the input signal distributed along the delay line taps. Inputs of individual elements of...
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5095459 |
Optical neural network
An optical neural network which imitates a biological neural network, to provide an associative and/or pattern recognition function, is made of light emitting elements to represent an input neuron...
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5080464 |
Optical neural network apparatus using primary processing
For inputting a two-dimensional image into an optical neural network apparatus, a primary processing device is used to extract the characteristic feature of an object pattern. Thereafter,...
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5078501 |
Method and apparatus for optically evaluating the conformance of unknown objects to predetermined characteristics
The conformance of an unknown object to predetermined characteristics is evaluated through a characteristic signature, using its transform image. The presence at an inspection station of each...
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5079555 |
Sequential image synthesizer
A method and apparatus for producing an image of a target area, by: at an observation location spaced from the target area, transmitting a beam of electromagnetic radiation toward the target area,...
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5076662 |
Electro-optical IFS finder
An electro-optical system that implements the self-tiling process of fining proper Iterated Function Systems for modeling natural objects. The system can operate in two different modes, a real-time...
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5063531 |
Optical neural net trainable in rapid time
Among light emitting and sensitive element pairs arranged along rows and columns of a matrix in each of first and second layers of an optical computer operable as a neural network with one-to-one...
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5054913 |
Method and apparatus for measuring the velocity of a fluid using analysis of Young's fringes in speckle photography
A method and apparatus for measuring the velocity of a fluid in which a double-exposure image of the speckle pattern or particle images of tracer particle in a fluid is irradiated with a collimated...
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5056039 |
Holographic interconnect system
A system to produce interconnections between a planar input array and a planar output array using a holographic planar array made by a single exposure or multiple exposures of a photosensitive...
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5044726 |
Device for the correlation between optical beams
A device for the correlation between optical beams having spatially modulated intensities has an active glass window, which on one side is illuminated at the same time by a reading and a pumping...
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5040135 |
Method of fringe-freezing of images in hybrid-optical interferometric processors
The invention is a method for obtaining fringe visibility in hybrid-optical interferometric processors. Encoded data defining an image is utilized to provide both a timing input signal and a method...
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5040140 |
Single SLM joint transform correaltors
A simple, low cost, high performance joint Fourier transform correlator, which requires only a single spatial light modulator, is disclosed. Input and reference images are recorded upon a single...
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5032010 |
Optical serial-to-parallel converter
An optical serial-to-parallel converter constructed from at least two optical shift registers connected in cascade, each optical shift register having a 1×2 optical switch connected to its output....
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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...
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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...
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5024508 |
Amplitude encoded phase-only filters for optical correlators
Method allows a first phase-only optical correlator filter function to be written on an amplitude modulating device such as a spatial light modulator (SLM) by applying a bias term to the phase only...
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5020111 |
Spatial symmetry cueing image processing method and apparatus
An optical correlation method and apparatus recognizes and locates specific patterns in a scene based on the spatial symmetries associated with that pattern. An input scene is divided into two...
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5020018 |
Outer product optical interferometer with hologram
An outer product shearing interferometer for an optical source of one-dimensional extent which provides interference between every two points on the source. The interferometer comprises an input...
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5016976 |
Modified compact 2f optical correlator
A modified 2f Fourier transform optical correlator combines a collimation and first Fourier Transform lens into one thin lens. The resulting correlator thus utilizes one less lens relative to the...
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5005946 |
Multi-channel filter system
A multi-channel filter which exploits the parallel processing advantages of an optical signal processor is used to sort, classify and remove noise or unwanted signals from signals of interest. This...
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