Optical: systems and elements – Holographic system or element – Having particular recording medium
Patent
1991-11-25
1992-09-22
Arnold, Bruce Y.
Optical: systems and elements
Holographic system or element
Having particular recording medium
359559, 359561, G03B 116, G02B 2742
Patent
active
051502283
ABSTRACT:
Edge enhancement of an input image by four-wave mixing a first write beam with a second write beam in a photorefractive crystal, e.g., GaAs, achieved for VanderLugt optical correlation with an edge enhanced reference image by optimizing the power ratio of a second write beam to the first write beam, e.g., 70:1, and optimizing the power ratio of a read beam, which carries the reference image to the first write beam, e.g., 100:701. Liquid crystal TV panels are employed as spatial light modulators in order to change the input and reference images in real time.
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Cheng Li-Jen
Liu Tsuen-Hsi
Arnold Bruce Y.
Jones Thomas H.
Manning John R.
Miller Guy M.
Ryan J. P.
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