Matches 51 - 100 out of 114 < 1 2 3 >
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4938550 Holographic deflection device  
A holographic deflection device having a tunable laser, and at least one hologram for deflecting light incident thereupon from the tunable laser, so that the deflection of the light can be...
4879532 Method and apparatus for phase conjugate optical modulation  
A method and apparatus for phase conjugate optical modulation involves creating a phase hologram within a nonlinear medium by overlapping, within the nonlinear medium, a pair of laser beams,...
4857425 Manufacture of integrated circuits using holographic techniques  
A method of manufacturing integrated circuits using holographic techniques by interference between an input beam and a reference beam generated from laser sources. A holographic image of the object...
4779943 Optical system for semiconductor laser and optical information processing equipment utilizing the same  
An optical system and a optical information processing equipment utilizing the same are disclosed. The optical system comprises a laser diode and a hologram lens has an interference fringe prepared...
4735474 Photograph booth with automatic holographic camera  
A photograph booth for providing a hologram of a human subject positioned inside the booth in facing relationship to a holographic sheet film on which the hologram of the subject is to be recorded....
4726639 Optically implemented memory correlator using a photorefractive crystal  
An optically implemented technique which generates the correlation function f two electrical signals. A reference signal is used in conjugation with an acousto-optic device to generate an optical...
4699446 Dynamic power control for an external cavity stabilized laser diode in a holographic scanner  
A dynamic power control for an external cavity stabilized laser diode adapted for use with a Raster Output Scanner employing a photodiode to convert light emitted from the rear facet of the diode...
4624568 Holographic test method for rotational effects on gears  
A holographic method for determining rotational effects upon either gear of gears (1, 2) of a gear set having respective mutually orthogonal rotational axis (C 1 , C 2 ). Particularly, a...
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...
4601534 Shutterless pulse laser recording system and method  
A shutterless pulse laser holographic recording system comprises a holographic image recording medium, a high pass filter positioned between the medium and the object whose image is to be recorded,...
4600266 Light beam scanning apparatus with a variable scanning width  
A light beam scanning apparatus includes a laser device for emitting a laser beam, a deflector for periodically deflecting the laser beam thereby causing the laser beam to scan an object to be...
4497534 Holographic optical head  
A holographic optical head for imaging a laser diode for optical storage or magnetic tracking applications includes three holograms, a beam director and a quarter-wave plate. In a preferred...
4442455 Optical system for observation in real time with scanning  
An optical observation system in accordance with the invention comprises illumination means by scanning the object and means for detecting the radiation diffracted by the object. It also comprises...
4355858 Hologram lens  
A hologram lens capable of converting an output beam of light emitted from a semiconductor to a reconstruction light suitable for reconstructing holograms is prepared by use of the object light,...
4306763 Optical source comprising a semiconductor laser and optical means for the anamorphosis of the beam emitted by said laser  
An optical source comprising a semiconductor laser having an emissive junction and optical means for the anamorphosis of the beam emitted by said laser. The optical means comprise a concave...
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...
4220928 Adaptive correction of linear phase aberrations in laser amplifier systems  
Linear phase aberrations in laser amplifier systems are adaptively corrected by a device which propagates an object beam formed by reflection of a laser beam from a target backwards through a laser...
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...
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...
4071291 Holographic method for forming color holograms  
A color hologram is recorded on a holographic recording material sequentially by use of different color coherent light beams with a stripe filter placed on the recording material and moved by a...
4049336 Pulsed holographic system having independent universal beam adjustment  
An improved holographic instrument for evaluating the structural integrity of a load-bearing structure by recording on a holographic recording medium two successive holograms of the structure under...
4028104 Infrared hologram recording method  
A process is disclosed whereby infrared holograms can be recorded in photographic silver halide emulsions as positive images. High resolution holograms have been produced with 1.06 μm radiation in...
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...
3970390 Multifrequency laser oscillator for holographic contouring  
A multifrequency laser oscillator which generates coherent light of two closely adjacent optical frequencies in rapid succession for recording contour holograms by the double exposure technique....
3934461 Multiple exposure holographic interferometer method  
Apparatus and method wherein a photographic plate is doubly exposed by pulsed laser illumination to record successive instants in the history of an object under consideration. The doubly exposed...
3903483 Dye laser for holographic applications  
A dye laser for holographic applications is described wherein a Q-switched uby laser is used to pump the dye laser using Rhodamine-6G as the dye. The dye laser is pumped with a Q-switched ruby...
3892487 Holographic contouring with a multifrequency laser  
A multifrequency laser oscillator which generates coherent light of two closely adjacent optical frequencies in rapid succession for recording contour holograms by the double exposure technique....
3876281 SUPERRADIANT LASER ILLUMINATOR AND IMAGE AMPLIFIER  
A device is described in which amplified spontaneous emission from a high-gain laser medium illuminates an object through an optical system that also serves to collect the reflected or scattered...
3858963 TRANSVERSE MODE SELECTION IN LASERS FOR HOLOGRAPHY  
A generally annular mode selector is located in a laser cavity and allows lasing in a uniphase or fundamental transverse mode through an aperture in the mode selector, as well as in higher-order...
3836224 HOLDGRAM MEMORY READOUT SYSTEM  
A two-dimensionally scannable electron beam laser is used to address a planar hologram array memory, having a plurality of holograms in a two-dimensional array, from each of which holograms a given...
3799643 LASER SPATIAL COHERENCE COMPENSATION IN HOLOGRAPHY  
A compensating technique for use with a high-powered laser light source having an output with a plurality of transverse modes is disclosed which utilizes a diffusive medium placed between the laser...
3786367 HOLOGRAPHIC SYSTEM  
A holographic system employing a laser having a continuous wave lasing medium. The laser has at each end of its cavity mirrors of substantially 100 percent reflectivity. Pulses of laser energy...
3752557 SYSTEM OF HOLOGRAM REPRODUCTION  
An optical method for copying holograms from an original. The photographic support on which a copy is to be made, is positioned behind the original hologram and the whole is exposed to the...
3740111 HOLOGRAPHIC RECORDING SYSTEM FOR LARGE OBJECTS  
A holographic arrangement for recording a high quality hologram of an object having a length many times the coherence length of the coherent light waves employed in recording the hologram.
3736040 COHERENCE EXTENDER FOR Q-SWITCHED LASERS FOR USE IN HALOGRAPHY  
The coherence of Q-switched, solid state lasers, such as ruby lasers, is improved by employing an intracavity optical element, such as an etalon, positioned between the Q-switch and the active...
3706495 METHOD OF MEASURING THE VELOCITY OF A SMALL MOVING OBJECT  
The velocity of a small moving particle is determined by allowing the particle to pass between a laser light source and a photographic film or plate. The laser is caused to illuminate the...
3680944 HOLOGRAPHIC APPARATUS UTILIZING A PULSED LASER  
A holographic apparatus capable of utilizing a pulsed laser developing an incompletely coherent light beam for taking holograms, particularly in reflection. The apparatus makes use of a diffuser...
3655256 HOLOGRAPHY WITH THERMOCHROMIC RECORDING MATERIALS  
Disclosed are methods and apparatus for recording and reproducing optical information in thermochromic materials; exemplary materials are the ternary halides, ternary chalcogenides, and certain...
3633999 REMOVING SPECKLE PATTERNS FROM OBJECTS ILLUMINATED WITH A LASER  
This disclosure is directed to an apparatus and method of removing speckle patterns from objects illuminated with a laser. The laser beam is directed onto or through a beam divider or beam splitter...
3633987 METHOD OF AND APPARATUS FOR HOLOGRAPHICALLY CONTOUR MAPPING OF DISTANT OBJECTS  
A hologram is generated from which an image may be reconstructed of a distant object. This image has a brightness which is modulated so that areas or fringes of maximum or minimum brightness...
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...
3627402 HIGH-CAPACITY HOLOGRAPHIC MEMORY  
System capacity in a holographic memory is maximized by a reduction in spatial frequencies by reducing the angle of incidence of the reference and object beams during construction and eliminating...
3619064 MOIRE GAUGING SYSTEMS  
A moire gauging system for measuring deviations of complex surfaces of a master compared to a replica thereof or of a master compared to a deformed or vibrating master. To this end, optical fringes...
3617702 APPARATUS AND METHOD FOR PERFORATING SHEET MATERIAL  
Apparatus for perforating sheet material by means of a beam emitted from a laser source which comprises: A. a means for moving the sheet material; B. a laser source; C. a reflective hologram, said...
3610732 NONLINEAR IMAGE CONTRAST AMPLIFIER SYSTEM  
Stimulated thermal light-scattering techniques such as the amplification of a weak beam interfering with a strong beam in absorbing media produce amplification of the contrast of weak optical...
3603685 MULTIFREQUENCY LASERS FOR HOLOGRAPHIC CONTOURING  
A ruby or other solid laser is made to generate two or more closely adjacent optical frequencies. By illuminating an object to be recorded holographically with the laser light, range contours are...
3603684 RECORDING HOLOGRAMS OF OBJECTS WITH RANGE CONTOURS  
Holographic contour maps with closed controllable spacing of the range contours are made with one or two ruby lasers. For example, two ruby lasers may be provided, each being operated at a...
3603662 TWO-BEAM, WIDE-VIEWING ANGLE HOLOGRAPHIC APPARATUS  
Holographic apparatus for taking holograms in transmission with lasers of limited coherence permitting a wide-viewing angle on the order 50° to 60°. The apparatus features an angle between the...
3598467 FIBER OPTIC DIFFUSER FOR HOLOGRAPHY  
a4 182 A holographic apparatus capable of utilizing a pulsed laser developing an incompletely coherent light beam for recording holograms. The apparatus makes use of a bundle of transparent fibers...
3594060 HIGH-SPEED HOLOGRAPHIC CAMERA  
This invention provides apparatus for producing successive three-dimensional images of high-speed events, e.g. stages of an explosion. A pulsed beam of laser light is divided into a reference and...
Matches 51 - 100 out of 114 < 1 2 3 >