Optics: measuring and testing – By particle light scattering – With photocell detection
Patent
1988-06-24
1991-03-12
McGraw, Vincent P.
Optics: measuring and testing
By particle light scattering
With photocell detection
350 36, G01B 902
Patent
active
049996819
ABSTRACT:
A system for carrying out holographic interferometry utilizes the same pulsed laser both for the exposure of holograms and for the reconstruction of combined wavefronts resulting from the exposure of a test object to two time spaced laser pulses. This enables the real-time observation of fringes due to interference due to deformation of a test object between timed spaced laser pulses. Pulses used to reconstruct the combined wavefronts are synchronized to the field interval of a video camera associated with a frame grabber so that the combined image may be presented on a video monitor as a continuous flicker-free image. The combined wavefronts may be obtained from separately exposed holograms, from a hologram together with a direct image of an object produced by the same pulse used to reconstruct the hologram, or from a single hologram double exposed by two laser pulses.
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Brochure, "Holomatic 8000", Laser Technology Inc.
McGraw Vincent P.
Turner S. A.
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