Matches 151 - 200 out of 219 < 1 2 3 4 5 >
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4123783 Magnetic bubble display systems  
A display arrangement including a source of polarized radiation; a magnetic material capable of supporting magnetic bubble domains in the path of the polarized beam, for producing a modulated beam;...
4118685 Holographic signature processor  
A signature is holographically recorded for correlation and parallel procing against a large library of signatures. A transient electrical signal produces a pressure wave in an optical wavefront...
4114191 Bubble domain structuring in bubble domain memory plane  
Defining the structuring of bubble domains in a magnetizable layer of a bubble domain memory plane is determined by modifying the magnetic characteristics of the magnetizable layer in the...
4084880 Coherent optical computer for polynomial evaluation  
A holographic polynomial computer in which powers and products of the input variables are obtained by repeated diffraction at the input hologram. The information bearing beams are split,...
4084255 Positional, rotational and scale invariant optical correlation method and apparatus  
A method and electro-optical apparatus for correlating two functions, f 1 (x,y) and f 2 (x,y) which are shifted, scaled and rotated versions of each other without loss of signal-to-noise and...
4074361 Parallel data processing system  
An optical parallel computing system in which modes of a multi-mode laser are coupled holographically. The bistable state of oscillation of individual modes is controlled by a saturable absorber...
4073010 Correlation methods and apparatus utilizing mellin transforms  
Correlation methods and apparatus are disclosed which make use of Mellin transforms that are scale and shift invariant. There is no loss in the signal-to-noise ratio of the correlation, and data is...
4071907 Radar signal processor utilizing a multi-channel optical correlator  
A real-time radar processor utilizing a coherent optical system for provig target fine range and Doppler/azimuth angle data with increased signal-to-noise and signal-to-clutter ratios. Radar...
4066981 EMP Resistant oscillator with fiber optic frequency determining means  
A fiber optic delay line-controlled oscillator or tuned amplifier. Two embodiments are shown and described, one employing a single solid state active element and the other employing two such...
4058722 Electro-optic analog/digital converter  
A plurality of identical dielectric channel optical wave guides is fabricd in a single crystal substrate of linear electro-optic material and a source of linearly polarized light is arranged to...
4052705 Memory device for two-dimensional radiant energy array computers  
Memory device for two-dimensional radiant energy array computers in which the memory device stores digital information in an input array of radiant energy digital signals that are characterized by...
4045792 Analog to digital converter for two-dimensional radiant energy array computers  
Analog to digital converter for two-dimensional radiant energy array computers in which the converter stage derives a bit array of digital radiant energy signals representative of the amplitudes of...
4034355 Holographic digital data processing system with sequential data storage and retrieval  
A holographic digital data processing system is described in which the data is stored holographically in a recording medium with the data insertable and retrievable in a sequential manner. A...
4023037 Decoding composite images of three-dimensional objects by convolution  
A method of decoding composite images of three-dimensional objects which are coded by means of a large number of radiation souces of different perspective and which are decoded by means of a point...
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...
3984671 Optical process for producing classification maps from multispectral data  
A method of producing single-class and multi-class composite classification maps from multispectral data is provided. The multispectral data is transformed into a binary matrix format which is then...
3975710 Character pattern recognition method and apparatus using feature enhanced magnetic domain patterns  
A character pattern recognition method and apparatus for recognizing an unknown character pattern in accordance with a correlation between the unknown character pattern and each known standard...
3973247 Method of writing and erasing information for electrooptic ceramic memories  
An information is written or erased in such way that, while a memory employing electrooptic ceramics wherein a ferroelectric phase and an anti-ferroelectric phase (or paraelectric phase) coexist...
3971887 Dynamic magnetic bubble display system  
A dynamic pattern display and optical data processing system is provided including magnetic bubble devices which may be operated in real-time to produce a multi-tone (gray scale) two dimensional...
3944820 High speed optical matrix multiplier system  
Matrix-vector multiplication is accomplished by continuous wave polarized ght energy transmitted along a plurality of optical waveguides through modulation by a first optical modulator in response...
3942867 Optical memory apparatus  
An optical memory includes a light beam source, converting means for causing the light beam to take on a predetermined spot size, and a light-focusing fiber guide having a refractive index...
3943021 Optical data processing system  
A circuit plane or "board" includes a plurality of optical-micro-circuit device sockets with optical interface windows around the periphery of each socket. Each socket is adapted to receive a wafer...
3902166 Memory apparatus using cylindrical magnetic domain materials  
This invention relates to an electric apparatus using magnetic materials, comprising plural magnetic thin platelets provided with means for producing cylindrical magnetic domains in the...
3899780 Magnetic bubble store having optical centering apparatus  
A storage system comprising a plate of magnetic material with a two-dimensional regular array of positions. A domain can be written and read in each of said positions by means of electromagnetic...
3893023 Magnetic bubble device for visualizing magnetic field patterns  
A device for visualizing magnetic field patterns comprising a first layer having a periodic structure of magnetic "bubbles" which are maintained by the field of a second permanent magnetic layer....
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...
3831156 BIASING APPARATUS FOR MAGNETIC DOMAIN STORES  
This invention relates to magnetic biasing apparatus for devices employing cylindrical magnetic domains (commonly called bubbles) in a uniaxially anisotropic magnetic medium such as a single...
3815107 CYLINDRICAL MAGNETIC DOMAIN DISPLAY SYSTEM  
A flat display system using cylindrical magnetic domains existing within a magnetic sheet, such as orthoferrite or garnet. Located on the magnetic sheet is a propagation means corresponding to a...
3806903 MAGNETO-OPTICAL CYLINDRICAL MAGNETIC DOMAIN MEMORY  
This invention relates to devices employing cylindrical magnetic domains (commonly called bubbles) in a uniaxially anisotropic magnetic medium such as a single crystal platelet for the analysis and...
3787825 MAGNETIC DOMAIN STORE  
A magnetic store comprising a plate of magnetic material which has a compensation temperature for magnetization, and in which domains are situated in one of two possible positions of functionally...
3785736 SMALL-SIZED OPTICAL CORRELATOR  
The present invention relates to double-diffraction optical correlators. According to the invention there is provided a multi-channel optical correlator for shape recognition wherein the lenses and...
3779492 AUTOMATIC TARGET RECOGNITION SYSTEM  
A coherent, optical signal processor for recognition of specific known targets at extremely high speeds, applying matched-filter techniques. A modified matched filter includes a pair of matched...
3773401 COHERENT OPTICAL MULTICHANNEL CORRELATOR  
A coherent optical multichannel correlator for identifying an object by permeating an object with a beam of coherent light which is projected through a Fourier transformation lens onto a filter...
3716301 FINGERPRINT IDENTIFICATION APPARATUS  
A coherent optical processor fingerprint identification apparatus in which identification is established by correlating an optical beam pattern representative of the finger to be identified with a...
3704939 OPTICAL SIGNAL AVERAGING APPARATUS  
An apparatus for optical data processing which conducts a series of computation operations on data, which have an optical representation. The apparatus provides, by means of optical components, a...
3701122 FERROELECTRIC DOMAIN SHIFTING DEVICES  
Ferroelectric crystals which are also ferroelastic, such as gadolinium molybdate, can support stable internal ferroelectric polarization domains. These domains are expanded and moved in the...
3694657 HOLOGRAPHIC CORRELATOR WITH A FOLDED PATH ACOUSTIC CELL INPUT  
An optical signal processing system includes apparatus for identifying a complex signal by an optical matched filter. The matched filter consists of a hologram recorded by projecting coherent light...
3663194 METHOD FOR MAKING MONOLITHIC OPTO-ELECTRONIC STRUCTURE  
Multilayer opto-electronic module structures and their method of fabrication. Alternate layers of light conducting material and light isolating material are formed on a substrate and on each other....
3646462 FIBER FOR DISTORTION-FREE PROPAGATION  
A fiber for use in the propagation of light pulses with the attendant elimination of distortion. The fiber is useful as a delay line storage device for computer information with an extremely...
3637290 OPTICAL DATA PROCESSOR PROVIDING ALL RANGE TRACKING AND ALL RANGE FOCUSING  
An optical data processor for Doppler radar information stored on a film uses a four-lens telescopic optical system to cause the azimuth target histories to come to focus on a plane surface where...
3631713 EARLY DETECTION OF METAL FATIGUE WITH A COHERENT OPTICAL CROSS-CORRELATION PROCESS  
A process for early detection of metal fatigue by coherent optical cross correlation of light from a test surface at time t k with a holographic filter of the same test surface made at an earlier...
3624605 OPTICAL CHARACTER RECOGNITION SYSTEM AND METHOD  
A system and method for identifying an unknown character by superimposing two coherent light beams containing diffraction patterns of an unknown and a reference character. The two light beams have...
3622988 OPTICAL CHARACTER RECOGNITION APPARATUS  
An optical character recognition apparatus comprising a signal processor including a light source and lenses for directing a light beam through both a transparency of the character to be recognized...
3619031 ELECTRO-OPTIC PARITY CHECKER  
A parity checker is disclosed in which electrical signals representing "1" and "0" bits of an information word are supplied to optically aligned electro-optic polarization rotators. A polarized...
3614192 HOLOGRAPHIC LOGIC OPERATOR FOR AN OPTICAL DATA PROCESSING SYSTEM  
A method of processing information by combining regions of a radiant energy beam which have been modulated according to the information. The combination is performed according to a pattern of phase...
3612698 AUTOMATIC HOLOGRAPHIC WAFER POSITIONING SYSTEM AND METHOD  
System and method for automatic alignment of workpieces such as semiconductor wafers and a photomask for subsequent image exposure. Alignment is based on the transparency of the wafers to infrared...
3602887 PATTERN CLASSIFICATION METHOD AND APPARATUS  
The apparatus for practicing the method of classifying patterns is a character recognition system. An optical representation of a function of an unknown character is obtained by applying...
3580688 INFORMATION STORAGE WITH OPTIC MATERIALS  
Anisotropic color centers, such as the M A center in optical materials like sodium doped potassium chloride crystals, are used for the storage of information. The color centers are first oriented...
3553460 REALIZATION OF COMBINATORIAL FUNCTIONS BY UTILIZING OPTICAL HOLOGRAPHY AND PHASE MODULATION BY INPUT INFORMATION  
A method of processing information by combining regions of a radiant energy beam which have been modulated according to the information. The combination is performed according to a pattern of phase...
3550084 SYSTEM AND METHOD FOR IDENTIFYING A SET OF GRAPHIC CHARACTERS GROUPED TOGETHER ON A VISIBLE INFORMATION DISPLAY  
Matches 151 - 200 out of 219 < 1 2 3 4 5 >