Optical associative memory employing an autocorrelation matrix

Details Optical associative memory employing an autocorrelation matrix Optical associative memory employing an autocorrelation matrix

1989-10-31

1990-11-27

Hecker, Stuart N.

Static information storage and retrieval

Associative memories

Ferroelectric cell

365 45, 364604, G11C 1300, G06F 15336, G06G 7195

Patent

active

049742027

ABSTRACT:
An optical associative memory produces an electrical correlation matrix pattern from an inputted electrical reference pattern and an electrical recall pattern, and converts the electrical correlation matrix pattern into a corresponding optical correlation matrix pattern, which is stored in a correlation matrix storage device. A reference pattern conversion device converts the electrical reference pattern into an optical reference pattern and a multiple image formation system converts the optical reference pattern to the other optical reference pattern. A pattern operation device produces an optical recall pattern by multiplying the optical correlation matrix pattern and the optical reference pattern. An inverse multiple image information system and a light receiving matrix convert the optical recall pattern into a corresponding electrical recall pattern, and the obtained electrical recall pattern is subjected to a thresholding operation. As a result, the recall pattern is obtained from the reference pattern after learning with a plurality of reference patterns through optical processing.

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