Optical: systems and elements – Holographic system or element – Having particular recording medium
Patent
1991-10-07
1994-01-25
Arnold, Bruce Y.
Optical: systems and elements
Holographic system or element
Having particular recording medium
359 7, 359 29, 359561, 359563, G03H 102, G03H 116, G02B 2746, G02B 2744
Patent
active
052820670
ABSTRACT:
A self amplifying optical pattern recognizer includes a geometric system configuration similar to that of a Vander Lugt holographic matched filter configuration with a photorefractive crystal specifically oriented with respect to the input beams. An extraordinarily polarized, spherically converging object image beam is formed by laser illumination of an input object image and applied through a photorefractive crystal, such as a barium titanite (BaTiO.sub.3) crystal. A volume or thin-film dif
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Arnold Bruce Y.
Brunell Norman E.
California Institute of Technology
Jr. John Juba
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