G - Physics – 03 – H
Patent
G - Physics
03
H
88/0.12
G03H 1/04 (2006.01) G03H 1/00 (2006.01) G03H 1/08 (2006.01) G11C 13/00 (2006.01)
Patent
CA 2012242
ELECTRONIC HOLOGRAPHIC APPARATUS ABSTRACT The invention relates to holography and more particularly to an electronic holographic apparatus whose electrical output represents the magnitude and phase of coherent light reflected from a three-dimensional object and distributed over the aperture of the apparatus. The apparatus provides a coherent beam which illuminates the object to create a speckle pattern in an aperture bounding an optical sensing arrangement. A reference beam derived from the same source as the illuminating beam illuminates the sensing aperture directly and creates fringes in the speckle pattern. The optical sensing arrangement consists of a charge injection device (CID) camera with plural optical detectors arranged in relation to the speckle pattern to sense the magnitude and spatial phase of each speckle (on the average). The sampled outputs of the CID detectors are processed to isolate the magnitude and phase information representing the complex optical wavefront of the hologram from irrelevant terms created by the interference process. The detected information may be used for such purposes as imaginq, interferometry, matched filtering or correlation.
Chovan Joseph
Engeler William E.
Penn William A.
Tiemann Jerome J.
Chovan Joseph
Company General Electric
Craig Wilson And Company
Engeler William E.
Penn William A.
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