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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...
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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...
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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...
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3719076 |
APPARATUS FOR THE HOLOGRAPHIC ANALYSIS OF OSCILLATING OBJECTS
A method and apparatus for holographic analysis of oscillating objects, in which the recording laser beam, either before or after being split into reference and object beams, is amplitude modulated...
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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...
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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...
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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....
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3670098 |
OPTICAL SCANNING APPARATUS
An object to be studied or analyzed is flooded with light from a laser. The light field transmitted from the object, which might for example be a transparency or a vibrating surface, is received by...
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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...
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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...
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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...
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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...
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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...
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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...
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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,...
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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...
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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...
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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...
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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...
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3551594 |
REAL TIME HOLOGRAPHIC TELEVISION SYSTEM
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3541252 |
HOLOGRAPHIC METHOD FOR VIEWING CHANGES IN A SCENE
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3541238 |
REAL TIME THREE DIMENSIONAL TELEVISION SYSTEM UTILIZING WAVE FRONT RECONSTRUCTION TECHNIQUES
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3540790 |
METHOD AND MEANS FOR RECORDING AND RECONSTRUCTING HOLOGRAMS WITHOUT USE OF A REFERENCE BEAM
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3539260 |
METHOD AND APPARATUS FOR AUTOMATIC ALIGNMENT OF COHERENT OPTICAL SPATIAL FREQUENCY FILTERS
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3532431 |
SHEARING INTERFEROMETRY BY MEANS OF HOLOGRAPHY
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3520610 |
PARTICLE DISTRIBUTION READOUT USING HOLOGRAPHIC METHODS
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3494698 |
FEEDBACK CONTROL DEVICE FOR STABILIZATION OF INTERFERENCE FRINGES
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3488101 |
HOLOGRAPHIC RECORDING SYSTEM IN WHICH IMAGE RESOLUTION EXCEEDS MAXIMUM FILM RESOLUTION
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T861026 |
Title is not available
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3434339 |
HOLOGRAPHIC METHOD AND APPARATUS FOR ACOUSTICAL FIELD RECORDING
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3410363 |
Method and apparatus for testing the wave-reflecting characteristics of a chamber
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3564572 |
Title is not available
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3556631 |
Title is not available
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