Matches 201 - 235 out of 235 < 1 2 3 4 5
Match Document Document Title
4206965 System for synthesizing strip-multiplexed holograms  
A system for synthesizing strip-multiplexed holograms, with or without coherent light, from a plurality of two-dimensional images. The two-dimensional images may be formed by a motion picture film...
4155630 Speckle elimination by random spatial phase modulation  
A process and apparatus for improving image creation in a coherent light imagery system which involves directing diffused laser light onto a mirror having a rocking motion that will cause the...
4140373 Dual-hologram identity card  
An identity card is secured against forgery of the information thereupon and the appearance thereof by imparting coded information holographically to a photosensitive sheet of the card as coded,...
4121881 Duplicating a holographic record by using two reference beams  
A primary recording medium simultaneously receives a pair of reference beams, one of which is comprised of rays that are parallel to an axis of rotation of the primary medium. The primary medium is...
4116526 Double modulation holographic recording technique  
By simultaneously illuminating an area of a hologram recording medium through an object transparency situated in substantially direct contact with the recording plane of the hologram recording...
4094575 Holographic article and process for making same  
A holographic article preferably including a plurality of superimposed and/or spatially adjacent linear gratings, each of which has a spatial frequency different from that of the other gratings....
3954322 Holographic Doppler-spread imaging of moving objects  
The Doppler frequency shift of coherent light reflected from moving objects is used to obtain resolution much greater than the classical limit for imaging systems. The Doppler information is...
3937554 Holograms impregnated with laser active material  
A hologram device carrying at least one hologram on a light sensitive medium in which the part of the light sensitive medium which carries the hologram thereon is impregnated with a laser active...
3919881 Temporal reference wavefront reconstruction process and system  
An improved process and method of wavefront reconstruction is disclosed in which one of the reference and object illuminating beams is shifted in phase relative to the other for a subsequent...
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...
3877776 Speckle reduction in holography  
Interference dot patterns that would be inevitably introduced in the holographic recording using diffused light have undesirable visual effects. Such undesirable effects can be greatly reduced by...
3865996 HOLOGRAPHIC AUDIO SIGNAL RECORDING AND PLAYBACK APPARATUS  
A recording and playback apparatus for holographically recording and reproducing audio signals. In recording, the modulating element is either a vibrating mirror or an electro-optical cell. During...
3856986 SCANNED HOLOGRAPHY SYSTEMS USING TEMPORAL MODULATION  
A hologram from which a three-dimensional image of a three-dimensional object may be reconstructed is provided by combining the light scattered by the object with light from a reference light beam...
3807828 HOLOGRAPHIC SYSTEMS  
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...
3796476 METHOD OF MAKING TOTALLY INTERNALLY REFLECTED HOLOGRAMS  
A method is described for making holograms by means of linearly polarized object and reference beams, the reference beam being reflected inside the photosensitive emulsion. The plane of...
3749470 EXTENDED FIELD DEPTH HOLOGRAPHIC METHOD AND APPARATUS  
A hologram is formed by simultaneously exposing a photographic plate to light reflected from an object illuminated by a laser and to a composite reference beam derived from a laser. The composite...
3729249 METHOD AND APPARATUS FOR LARGE OBJECT INTERFERENCE PATTERN RECORDING  
Interference pattern recording of large objects or scenes having dimensions exceeding the coherence lengths of available light sources is accomplished. The recording is performed by illuminating...
3661437 METHOD FOR PRODUCING HOLOGRAMS OF MOVING OBJECTS  
In the method of producing a hologram for an object in which a beam illuminating the object and a reference beam produced by the same light source establish the hologram by interference in a...
3659947 HOLOGRAPHIC APPARATUS WITH AUTOMATIC CONTROL SYSTEM FOR MAINTAINING CONSTANT PHASE RELATION BETWEEN REFERENCE AND OBJECT BEAMS  
Apparatus for making holograms is disclosed which includes an arrangement for maintaining a constant phase relationship between the object and reference beams so that the fringe pattern remains...
3644047 APPARATUS AND METHOD OF SIMULTANEOUSLY INSPECTING A PLURALITY OF SURFACES OF A BODY BY HOLOGRAPHIC INTERFEROMETRY  
To detect imperfections on at least two nonparallel surfaces of a pneumatic tire simultaneously the tire is inflated on a rotatably supported wheel and a hologram is formed of surfaces to be...
3639030 HOLOGRAPHIC METHOD OF FARMING CONTOUR LINES IN AN IMAGE UTILIZING LIGHT OF LIMITED COHERENCE LENGTH  
This invention provides a device for forming hologram. Fabry-Perot etalon is interposed in the parallel reference light rays. The distance D of Fabry-Perot etalon is made substantially equal to the...
3636249 HETERODYNE SCANNING SYSTEM FOR HOLOGRAM TRANSMISSION  
A hologram heterodyne scanner wherein a stationary coherent light beam illuminates the subject and is then optically relayed via a beamsplitter to a photodetector. The other phase-locked optical...
3635539 WIDE-ANGLE HOLOGRAPHIC APPARATUS  
A method and apparatus for constructing wide angle holograms. The construction apparatus comprises propagating onto a Ronchi ruling and photographic plate serially disposed in the path of the beam....
3632214 METHOD AND APPARATUS FOR STABILIZING THE PHASE OF RADIATION  
Stabilization of the phase of the radiation utilized in a plural beam interferometric-type system is accomplished. Monitoring of the intensity of the interfering beams of radiation is performed so...
3632182 METHOD AND APPARATUS FOR INTERFERENCE PATTERN RECORDING  
Interference pattern recording is accomplished by simultaneous holographic and Lippmann holographic methods by directing the otherwise wasted radiation of the noninformation modulated beam back...
3627426 HOLOGRAM INTERFEROMETER WITH TWO REFERENCE BEAMS  
A method and apparatus are provided for obtaining interference fringes in a double exposure hologram interferometer using two collimated reference beams capable of restoring clear interference...
3622794 IMPROVEMENTS IN FEEDBACK APPARATUS FOR STABILIZING HOLOGRAMS  
Method and apparatus for stabilizing the wave fronts at the recording plane of a hologram during hologram manufacture or while viewing a stored-beam interferogram. The disclosed system alleviates...
3582177 METHOD AND DEVICE FOR HOLOGRAPHICALLY PHOTOGRAPHING AND REPRODUCING OBJECTS  
Method and apparatus for holographically photographing an object and reproducing it from a hologram includes dividing either a reference beam or a reproducing beam, illuminating a hologram,...
3578838 MULTIPLE HOLOGRAM RECORDING AND READ OUT SYSTEM  
An information recording and readout system is presented wherein multiple holograms are recorded in a single hologram recording medium by the use of three intersecting light beams and a lens...
3572882 VARIABLE REFERENCE PHASE HOLOCAMERA TO COMPENSATE FOR OBJECT MOTION  
A variable reference phased holographic system for recording holograms of objects having some movement with respect to the photographic plate which has the conventional signal beam and reference...
3566021 REAL TIME THREE DIMENSIONAL TELEVISION SYSTEM  
This disclosure relates to a television system that utilizes wave front reconstruction techniques to provide a real time three-dimensional image at the receiving end of the system, with the image...
3551018 TOTAL INTERNAL REFLECTION HOLOGRAPHY  
3511569 METHOD AND APPARATUS FOR DETERMINING VELOCITY OF MOVING OBJECTS  
3492652 OPTICAL ASSOCIATIVE MEMORY SYSTEM  
3560071 Title is not available  
Matches 201 - 235 out of 235 < 1 2 3 4 5