Matches 351 - 400 out of 430 < 1 2 3 4 5 6 7 8 9 >
Match Document Document Title
4806454 Method for the formation of a diffraction grating  
A method for the formation of a diffraction grating on a substrate using a holographic technique and an etching technique, wherein the periodicity of the pattern of the diffraction grating can be...
4802718 One piece frame for holding a holographic element in a holographic system  
A one piece frame for holding a holographic element in a holographic system, and comprising a border portion, a seating portion, and a plurality of lateral positioning tabs. The border portion...
4750153 Associative holographic memory apparatus employing phase conjugate mirrors and a two-wave mixing contra-directional coherent image amplifier  
Associative holography memory apparatus is disclosed which employs a hologram, two phase conjugate mirrors, and a two-wave mixing contra-directional coherent image amplifier. The mirrors and...
4739496 Associative holographic memory apparatus employing phase conjugate mirrors  
Associative holography memory apparatus is disclosed which employs a hologram and two phase conjugate mirrors. The mirrors are arranged to form a conjugate resonator whereby the output image from...
4738498 Method of recordng a hologram  
A method of recording a hologram on a recording medium composed of a substrate and a recording material coated as a thin layer on the substrate, the recording medium being transparent or...
4713738 Light fixture using a holographic optical reflector  
Light fixtures achieve improved efficiency by utilizing a reflective holographic optical element to direct light from a light source to a task area. The light fixture can employ any conventional...
4712851 Positioning alignment apparatus and method using holographic optical elements  
An apparatus and a method employ on a subject at least one holographic optical element that develops two beams of focused light whose focal configurations appear in predetermined locations which...
4685768 Color control in holograms  
Color control in a Denisyuk type hologram having interference fringes lying generally parallel to the substrate is effected by subjecting the initially produced hologram to resensitizing,...
4681324 Holographic game cards  
A deck of playing cards wherein part or all of the indicia indicating the value of each card is formed of a holographic image which is clearly viewable from one range of angles, such as angles at...
4655542 Optical signal processing arrangements  
Shade or tint intensities in holograms are calibrated by an array of calibration pixels in each hologram. The preferred array consists of crossed lines of the calibration pixels in the hologram...
4643514 Internal structure holography  
A method and apparatus are provided for the holographic examination of the internal features of cavities and passageways of a structure. The apparatus employs laser beam sources positioned within...
4637056 Optical correlator using electronic image preprocessing  
An optical processing system uses spatial filtering to recognize two-dimensional functions and images. Images of real objects are captured with a television camera. The electronic signals...
4620089 Automatic optical focusing device  
An auto-focus system for focusing reflecting objects which are under investigation in a measuring device. The invention comprises a light source for producing an illumination beam for illuminating...
4609890 Bulk acoustic wave signal processing devices  
An acoustic wave signal processing device which in a preferred embodiment utilizes at least one holographic grating formed within a portion of the interior of a substrate which is capable of...
4511247 Surveying technique with correction of optical errors caused by atmospheric turbulence  
A survey of an airport runway or other large structure includes statistical correction of error caused by atmospheric turbulence. Visible grid markers are placed, e.g., at twenty foot centers, in...
4506945 Hologram apparatus for detecting flaws with developing chamber  
Hologram apparatus for detecting flaws has a photographic station for supporting a photosensitive medium. The photographic station together with the photosensitive medium forms a developing chamber...
4421317 Electronic game apparatus using a three-dimensional image  
An electronic game includes a base having an opening; at least one three-dimensional image stored on a plate, typically a hologram; a light source for each image; a microcomputer; and player...
4410244 Retinal acuity testing device  
Optical measuring and testing apparatus incorporating a holographically recorded, single-frequency, optically thin phase grating. When this phase grating is illuminated by a quasi-monochromatic...
4395124 Apparatus for position encoding  
A position encoder including a holographically recorded, single-frequency, phase grating. When this phase grating is illuminated by a quasi-monochromatic spatially coherent light source, it acts as...
4392745 Tilt head camera for interferometric analysis of tires  
An adjustable camera is operative to perform interferometric analysis of areas on the surface of an object such as a vehicle tire using light from a coherent source. The camera mechanism includes...
4376950 Three-dimensional television system using holographic techniques  
A hologram, produced by illuminating an object via a coherent light source and associated optics, or by digital components or photographic components, is imaged onto, for example, a television...
4212536 Holographic subtraction with phase modulation to distinguish phase and amplitude differences  
Two substantially identically patterned transparencies, i.e. a master photomask and a copy thereof, are compared with each other by transluminating the master with an object beam, producing a...
4208637 Tunable optical device  
A tunable optical device is produced by forming in the surface of a substrate a fan-shaped grating of continuously varying period by means of a holographic technique using a photoresist and twisted...
4118104 Split hologram and methods of making and using same  
A holographic recording method for making a split hologram of an illuminated object from a holographic sensitive member, the method comprising the steps of segmenting both the illuminated object...
4093382 Hybrid holographic non-destructive test system  
An automatic hybrid holograhic non-destructive testing (HNDT) method and system capable of detecting flaws or debonds contained within certain materials. This system incorporates the techniques of...
4054358 Recording a phase hologram having reduced intermodulation distortion  
A moveable mask with a pin hole therethrough is disposed between a source of an object beam and a holographic recording medium. The pin hole limits the angular range of rays of the object beam...
4029507 Process for the production of lightfast phase holograms utilizing ammonium dichromate and gelatin as photosensitive recording material  
Hardenable gelatine recording materials are used in a process for the production of lightfast phase halograms. The recording material is hardened by the exposure to light and sensitized with...
4008967 Device for testing masks for semiconductor components  
A device for testing masks, such as used in producing semiconductor components characterized by a source projecting a beam of coherent light at the mask, a multiple optic means which is either a...
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...
3976380 Holographic arrangement for testing materials without destroying same  
A method and apparatus for nondestructive testing of articles by holography in which light beams from a virtual point source of laser light and from an observation point are reflected by a...
3950707 Quantum amplifier having passive core and active cladding providing signal gain by interaction of evanescent-wave components of signal and pump beams propagating along the core  
An optical amplifier particularly for use in a high data-rate fibre-optics communication link utilizing a body of a dielectric substance transparent to signal light of a given band of wavelengths...
3936140 Arrangement for sequential data storage  
An apparatus for sequential data storage employing a coherent light source from which an object wave and a reference wave source symmetrical to one another are created, each wave being directed...
3911230 Holographic reproduction of sound  
A recording and reproducing method in which the groove undulations of a typical disk phonographic recording are transformed into a hologram. The hologram is then mounted for relative movement with...
3883215 Holographic system for non-destructive testing  
A holographic system for non-destructive testing in which a mirror provid illumination of a surface of a test object is positionable to direct illumination on the object at varying angles with...
3876990 Methods of storing information using arrays of multiple spot patterns  
The systems of this invention involve the storage of information on a record medium in the form of patterns of spots arrayed along one or more tracks, the patterns are spaced apart a distance which...
3873181 INFRARED CORRELATION METHOD USING THERMOCHROMICS HAVING A HYSTERESIS PROPERTY  
Disclosed are methods and apparatus for recording and reproducing optical information in thermochromic materials; exemplary materials are the ternary halides, ternary chalcogenides, and certain...
3838912 OPTICAL DEFLECTING APPARATUS  
In a holograph memory device, an incident beam from a laser source is displaced parallelly by a first optical deflector. This emergent beam from the first optical deflector is then angularly...
3837726 CAMERA FOR MAKING HOLOGRAMS  
A camera for making a hologram is provided with a device for varying the optical path length of the object light or the reference light. The camera includes a range finder to measure the distance...
3831031 ZONE PLATE IMAGING SYSTEM  
A nuclear imaging system for mapping a spatially distributed source of high energy nuclear particles from a living organ which has selectively absorbed a radioactive compound in which the nuclear...
3829832 SYSTEM FOR RECOGNIZING PATTERNS  
A system for recognizing patterns arranged in rows and columns with the rows forming elements of a given input group and the columns forming elements of a given input group so that there are a pair...
3826555 HOLOGRAPHIC CAMERA FOR FORMING PLANAR OR VOLUME HOLOGRAMS  
A holography device which comprises a beam splitter arranged in the optical path of an incident beam from a beam source, said beam splitter splitting said incident beam into at least three beams,...
3797944 NON-DESTRUCTIVE TESTING OF ACOUSTICAL HONEYCOMB PANELS  
A time average holographic transparency photograph is made of the imperforate surface of acoustical honeycomb panel having a plurality of cells while the perforate surface is subjected to sound...
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...
3790926 METHOD FOR DETERMINING THE SPEED OF A VEHICLE  
A method of determining the speed of vehicle, particularly a ship by the transmission of coherent waves, with echo signals being received at a plurality of points along a receiving line extending...
3788749 IMAGE QUALITY RATING SYSTEM  
The sharpness of definition of an image on film may be automatically determined by comparing an original image on film with a perturbation of the same image formed from the original image. Such...
3762215 TIME AVERAGE HOLOGRAPHIC CONSTRUCTION TECHNIQUES USING A MODULATED BEAM  
A technique for examining vibratory or other changing characteristics of an object by constructing a time averaged hologram of the changing object. In one embodiment, the hologram constructing...
3761721 MATTER WAVE INTERFEROMETRIC APPARATUS  
An apparatus is disclosed which makes use of interferometry of the matter waves accompanying particles such as neutral atoms, charged ions or electrons. The apparatus includes a particle source and...
3749469 REDUNDANT FRAUNHOFER RECORDING SYSTEM  
When a pinhole array is employed as a redundancy means in recording a redundant Fraunhofer hologram, such as a holographically prerecorded motion picture, a moving noise is normally present in the...
3748048 METHOD OF DETECTING CHANGES OF A SPECULAR SURFACE  
A method of detecting small dimensional surface changes in a specular object or of comparing two nearly identical specular objects comprises illuminating a holographic plate by a plane reference...
3735036 REAL TIME INTERFEROMETRY CONTOUR MAPPING SYSTEM  
A real time holographic interferometer for measuring height variations or contours on the surface of an object is disclosed. Two interference patterns are formed, one of an object whose surface is...
Matches 351 - 400 out of 430 < 1 2 3 4 5 6 7 8 9 >