Static information storage and retrieval – Information masking – Diffraction
Patent
1987-06-19
1989-08-22
Hecker, Stuart N.
Static information storage and retrieval
Information masking
Diffraction
350 36, 356347, 365216, G11C 1304, G11C 700
Patent
active
048602531
ABSTRACT:
An associative memory system incorporating a hologram, a spatial light modulator (SLM) and thresholding components in a feedback loop to derive an enhanced reference beam for use in reconstructing a stored image. In a preferred embodiment, the SLM includes a liquid crystal light valve (LCLV). A polarizing thresholding analyzer device provides adjustable thresholding. An enhanced thresholded reference beam thereby derived is sent back to the hologram for readout and the stored image is reconstructed at the output plane of the system. In an alternative embodiment, two spatial light modulators and two feedback loops are provided in a resonator configuration.
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Owechko Yuri
Soffer Bernard H.
Duraiswamy V. D.
Garcia Alfonso
Hecker Stuart N.
Hughes Aircraft Company
Karambelas A. W.
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