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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...
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...
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...
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...
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...
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...
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...
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...
3711202 HOLOGRAPHIC TESTING APPARATUS  
Components of a holographic system are mounted for movement as a unit along a horizontal path of travel. Means for holding an object to be holographed, including a pair of trunnions having a...
3690159 HOLOGRAPHIC INTERFEROMETRY EMPLOYING IMAGE PLANE HOLOGRAMS  
A hologram of a test specimen is formed in an optical arrangement including a lens which focuses coherent light reflected by the object onto a photographic plate. A real-time interferometric...
3677634 CONTACTLESS MASK PATTERN EXPOSURE PROCESS AND APPARATUS SYSTEM HAVING VIRTUAL EXTENDED DEPTH OF FOCUS  
Forming a photoresist mask pattern by employing a three-dimensional mask having non-reflective passages. The mask pattern is recorded on a holographic plate to form a holographic pattern....
3668405 OPTICAL SYSTEM FOR IDENTIFYING PULSES  
An optical system for identifying a pulse or wavetrain or for compressing the time duration of such a pulse. This is effected by passing monochromatic light through a cell containing a solid or...
3649754 REAL TIME INTERFEROMETRY UTILIZING A TELEVISION SYSTEM  
A real time holographic interferometer is disclosed. Two interference patterns of an object, one without stressing of the object and one with such stressing, are produced using holographic...
3645129 METHOD FOR ANALYZING THE JOINDER BETWEEN A PAIR OF ABUTTING MEMBERS  
A transducer induces vibrations into a member including at least a pair of members joined to one another along a common surface. An exposed section of the two members, which may or may not include...
3643017 APPARATUS FOR CONSTRUCTING A REDUCED INFORMATION CONTENT HOLOGRAM  
Apparatus for forming a reduced information content hologram, for transmitting that hologram, and for the reconstruction of a scene or object from that hologram. The reduced information content...
3642374 OPTICAL INSPECTING METHOD  
An optical inspecting method described in the illuminating wave and a wave under inspection onto an artificially prepared a holographic test plate, and filtering waves coming through the plate to...
3630592 METHOD AND APPARATUS FOR DETERMINING ENVIRONMENT CONDUCIVE FOR RECORDING INTERFERENCE PATTERNS AND HOLOGRAPHICALLY RECORDING  
Methods and apparatus for making a hologram of information on a holographic recording medium provide an object path for an object beam of coherent actinic light leading to the recording medium by...
3612693 METHOD FOR MEASUREMENT OF SURFACE PROFILE CHANGE USING A VERNIER SCALE IN HOLOGRAM INTERFEROMETRY  
To measure the amount of surface profile change of an object, a hologram is formed by recording on a photographic media the interference pattern between coherent light divided between a uniform,...
3604807 METHOD AND APPARATUS FOR HOLOGRAPHIC REAL TIME VELOCITY MEASUREMENT  
Method and apparatus are disclosed for measuring the velocity of a material using the techniques of holography in conjunction with measurement of a doppler shift frequency enabling the velocity at...
3592548 HOLOGRAPHIC METHOD OF DIMENSIONAL INSPECTION  
To dimensionally compare one contour surface with another, one surface is provided with a contrast pattern and a hologram is made of that surface. Then the hologram is reconstructed and the image...
3590640 HOLOGRAPHIC PRESSURE SENSOR  
A pressure sensor consisting essentially of a deformable diaphragm having a side subjected to the action of a fluid, liquid or gas, whose pressure is sought to be measured. The other side of the...
3572934 LONGITUDINALLY REVERSED SHEARING INTERFEROMETRY  
A type of shearing interferometry is presented in which an interferogram is formed by the object wavefront and its replica folded in the longitudinal direction. An off-axis hologram of the object...