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7444014 |
Extended depth of focus microscopy
Imaging techniques. The focus of an imaging device is varied while acquiring an image of an object. The resulting blurred image is deconvolved to generate, in one embodiment, a two-dimensional...
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7369600 |
Burst communications apparatus and method using tapped delay lines
A communications apparatus and method use tapped delay lines as multiplexers and demultiplexers. In one embodiment, a receiver ( 100 ) uses a tapped delay line ( 110 ) as a demultiplexer to acquire...
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7253950 |
Scanning laser microscope
A scanning laser microscope is provided which includes at least one laser light source for emitting laser light, a plurality of modulating sections for adjusting the laser light emitted from each...
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7130292 |
Optical processor enhanced receiver architecture (opera)
A method and apparatus for enhancing the receiving and information identification functions of multiple access communications systems by employing one or more optical processors configured as a...
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6996291 |
Systems and methods for correlating images in an image correlation system with reduced computational loads
After one or both of a pair of images are obtained, an auto-correlation function for one of those images is generated to determine a smear amount and possibly a smear direction. The smear amount...
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6587255 |
Acousto-optic scanning system with fast non-linear scan
An acousto-optic scanning system, which relies on two counter propagating acoustic waves with the same frequency modulation. This scheme completely suppresses the linear frequency chirp, and thus...
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6404536 |
Polarization independent tunable acousto-optical filter and the method of the same
The present invention pertains to a polarization independent tunable acousto-optical filter and the corresponding method. The filter diffracts an input light beam into a first input light beam...
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6404535 |
Optically implemented wideband complex correlator using a multi-mode imaging device
An optically implemented wide bandwidth correlation system ( 10 ) that employs a multi-mode imaging device ( 42 ) and a particular modulation format to provide both in-phase and quadrature phase...
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5955993 |
Detection of spread spectrum signals
A spread spectrum signal detection system comprising two spatially separated receivers, a correlator, such as a time integrating correlator employing acousto-optic cells, which is connected to the...
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5923460 |
Mechanism for extending instantaneous RF frequency coverage for an acousto-optic coherent channel receiver (AOCCR) via bandwidth dilation
In order to increase the available signal processing bandwidth of an acousto-optic coherent channelizer, the optical beam spot-shaping and projection components of the channelizer are configured to...
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5822111 |
Apparatus and method for coherent acousto-optic signal width modification
A apparatus and method for coherently stretching or compressing signals of nterest, i.e. without loss of information. A first, or tapping, Bragg cell has an acoustic signal launched in it which is...
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5420826 |
Optical correlator and method of using same
An apparatus including a first light modulator for modulating a first light beam with a signal, a second light modulator for modulating a second light beam with a reference signal, first lens...
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5410427 |
Method for the detection, recognition and use of signals mixed with other encoding or parasitic signals, and apparatus for performing the method
The invention is a method that considerably improves the rapidity of collection and recognition of electrical signals that are mixed with other signals that impede direct access. The subject of the...
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5394257 |
Optical neural network system
An optical system of an optical neural network model for parallel data processing is disclosed. Taking advantage of the fact that an auto-correlation matrix is symmetric with respect to a main...
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5337170 |
Quadratic optical processor for reducing multiplicative noise and other uses
A degenerate four-wave mixing arrangement employs a photorefractive crystal as a real time holographic recording medium to record a hologram of the noisy optical signal. The signal passes through...
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5281907 |
Channelized time-and space-integrating acousto-optical processor
A novel channelized, hybrid time- and space-integrating acousto-optic (AO) spectrum analyzer is described. The architecture consists of two acousto-optic cells in a crossed cell configuration. The...
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5247388 |
Continuously variable delay lines
An acousto-optic apparatus is described that varies the time delay of electrical signals over a continuum of delays. In the preferred embodiment, a light source, which can be either coherent or...
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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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5166822 |
Light beam frequency comb generator
A light beam frequency comb generator uses an acousto-optic modulator to generate a plurality of light beams with frequencies which are uniformly separated and possess common noise and drift...
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5166766 |
Thick transparent semiconductor substrate heterojunction acoustic charge transport multiple quantum well spatial light modulator
A one-dimensional or two-dimensional transmission mode spatial light modulator (SLM) includes one or more heterojunction acoustic charge transport (HACT) channels 18 with surrounding layers 16,20...
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5159420 |
Dual medium heterojunction acoustic charge transport multiple quantum well spatial light modulator
A one-dimensional or two-dimensional transmission mode spatial light modulator (SLM) includes two different mediums, one medium being a semiconductor comprising one or more heterojunction acoustic...
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5153597 |
Acousto-optical classifier
An acousto-optical classifier for classifying wide bandwidth signals such as high resolution radar returns of ships or very short pulse length signals of radar emitters. This is accomplished by...
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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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4866660 |
Optoelectraulic devices based on interference induced carrier modulation
A subpicosecond solid state optical correlator based on interference induced carrier modulation includes a photosensor circuit having a photoconductive element and a pair of opposed electrodes. A...
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4833637 |
Acousto-optic multi-channel space integrating correlator
Acousto-optic multi-channel space integrating correlators and methods of using the same are disclosed. The correlators consist of a single channel acousto-optic cell illuminated by a light source,...
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4722596 |
Acousto-optic analyzer with dynamic signal compression
An acousto-optic spectrum analyzer in which the dynamic range is effectively extended by detecting the frequency bands wherein the photo-detectors are saturated and providing a filter to suppress...
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4641273 |
General time, space and frequency multiplexed acousto-optic correlator
Time, space and frequency multiplexed time integrating acousto-optic correlators and exemplary uses thereof. The correlators utilize a plurality of radio frequency (RF) modulators, each operating...
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4626102 |
Bragg cell spectral analyzer with a prism expansion system
A Bragg cell spectral analyzer with a prism expansion system for a laser beam, which has a Gaussian cross-sectional distribution of light intensity, is generally superimposed with stray light, and...
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4591241 |
Acousto-optical spectrum analyzer
The invention relates to an acousto-optical device comprising a laser source, positioned in the vicinity of the center of curvature of a spherical cap, formed from an elasto-optical, piezoelectric...
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4575191 |
Compact beam splitter for acousto-optic correlator
A compact beam splitter apparatus for use with a surface wave acousto-optic time integrating correlator, including a beam splitter for splitting a laser light beam into two beams and a Koesters...
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4566760 |
Multi-product acousto-optic time integrating correlator
A device for processing signals to obtain a multi-product, time integrated, correlated output signal. A laser light beam is expanded and shaped into a sheet beam which is directed across the...
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4558925 |
Multi-function acousto-optic signal processor
An acousto-optic architecture is provided for simultaneously obtaining time integration correlation and power spectrum analysis. A laser beam is expanded and split into first and second beams. The...
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4514038 |
Optical Fourier transformer device and optical correlator incorporating the said device
This optical Fourier transformer device supplying the correlation function of two motifs of an object illuminated in coherent light by using the double diffraction principle is essentially...
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4426134 |
Three and four product surface-wave acousto-optic time integrating correlators
A method and device for processing spread-spectrum and other wideband comications and radar signals to obtain three and four product correlated signals. A laser beam is split and shaped into first...
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4421388 |
Acousto-optic time integrating frequency scanning correlator
An acousto-optic time integrating two-dimensional frequency scanning correlator for cross-correlating signals which are separated in frequency. Two coherent light beams which are derived from the...
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4326778 |
Acousto-optic time integrating correlator
A highly efficient time integrating acousto-optic correlator which determs the time difference of arrival of the signals being correlated as well as the center frequency and bandwidth of the...
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4124281 |
Scheme for terminal guidance utilizing acousto-optic correlator
An analog terminal guidance system and device. One dimensional strips of a arget scene are stored in a line in a longitudinally extending acousto-optic device as index of refraction variation...
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4124280 |
Acoustic-optic technique for processing many signals simultaneously
An acousto-optic apparatus utilizing multiplexing techniques, for obtaining he correlation of N pairs of signals. First and second sets of signals are combined in a piezoelectric crystal, and each...
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4110016 |
Acousto-optic real time correlator
An acousto-optic correlator device comprised of two parallel piezoelectric rystals having different acoustic velocities. Acoustic transducers are located at one end of the respective crystals, and...
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3706881 |
OPTICAL WAVE CORRELATION
1. Apparatus for determining the correlation between a message wave and a reference wave which comprises A source of light, A light-transparent compression wave-supporting medium, Means for...
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3700910 |
BRAGG ANGLE OPTICAL MATCHED FILTER SYSTEM WITH CODED GLASS TRANSMISSION PLATE
The optical matched filter system provides a means of achieving pulse compression for pulse radar with an improved range resolution. The system separates zero and first order light at low...
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3582635 |
OPTICAL CORRELATION OF ELECTRONIC PULSES
A moving waveform density image induced in an ultrasonic light modulator by an applied electronic pulse is optically correlated with a diffraction grating formed by grooves in a transparent plate...
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3466112 |
LOW NOISE PULSE EXPANSION USING A SCANNED OPTICAL CORRELATOR
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3365579 |
Optical wave correlator with acoustical modulation
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3189746 |
Expansion and compression of electronic pulses by optical correlation
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