Optical neural net memory

Details Optical neural net memory Optical neural net memory

1987-12-10

1989-07-18

Popek, Joseph A.

Static information storage and retrieval

Read/write circuit

Optical

365234, 364807, G11C 700

Patent

active

048499404

ABSTRACT:
An optical neural net, content addressable memory that does not include electronics or slow optics in the feedback path. The memory comprises an optical vector-matrix multiplier that includes a spatial light modulator and input and output optics, and optical feedback means for returning the outputs of the multiplier to the inputs. Presentation of partial data at selected inputs causes the neural net to iterate at light speed to determine the corresponding output data. An arrangement is described for providing bipolar operations and for letting any group of elements act as the net stimulus.

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patent: 4586779 (0000-01-01), Huignard et al.
patent: 4762397 (1988-08-01), Pepper
Robert J. Marks, II, "Class of Continuous Level Associative Memory Neural Nets," Applied Optics, vol. 26, No. 10, May 15, 1987; pp. 2005-2010.
Robert J. Marks, II et al., "Content Addressable Memories: A Relationship between Hopfield's Neural Net and an Iterative Matched Filter," ISDL Report #51887, Interactive System Design Lab, University of Washington, 5/18/87, 26 pages.
Judson G. McDonnell et al., "An Introduction to Neural Networks for Solving Combinatorial Search Problems," ISDL Report #7787, Interactive System Design Lab, University of Washington, 7/7/87, 19 pages.
N. H. Farhat et al., "Optical Implementation of the Hopfield Model," Applied Optics, vol. 24, No. 10, May 15, 1985; pp. 1469-1475.
D. Psaltis et al., "Optical Information Processing Based on an Associative-Memory Model of Neural Nets with Thresholding and Feedback," Optics Letters, vol. 10, No. 2, Feb. 1985; pp. 98-100.
T. Williams, "Optics and Neural Nets: Trying to Model the Human Brain," Computer Design, Mar. 1, 1987; pp. 47-50, 52-55, 58-62.
"Optoelectronics Builds Viable Neural-Net Memory," Electronics, Jun. 16, 1986; pp. 41-44.

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