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Programmable image associative memory using an optical disk and a photorefractive crystal

Neifeld, Mark A. and Psaltis, Demetri (1993) Programmable image associative memory using an optical disk and a photorefractive crystal. Applied Optics, 32 (23). pp. 4398-4409. ISSN 0003-6935. http://resolver.caltech.edu/CaltechAUTHORS:NEIao93a

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Abstract

The optical disk is a computer-addressable binary storage medium with very high capacity. More than 10^10 bits of information can be recorded on a 12-cm-diameter optical disk. The natural two-dimensional format of the data recorded on an optical disk makes this medium particularly attractive for the storage of images and holograms, while parallel access provides a convenient mechanism through which such data may be retrieved. In this paper we discuss a closed-loop optical associative memory based on the optical disk. This system incorporates image correlation, using photorefractive media to compute the best association in a shift-invariant fashion. When presented with a partial or noisy version of one of the images stored on the optical disk, the optical system evolves to a stable state in which those stored images that best match the input are temporally locked in the loop.


Item Type:Article
Additional Information:© Copyright 1993 Optical Society of America. Received 25 February 1992. This work was funded by the U.S. Army Research Office. We thank R.R. Neurgaonkar for the SBN crystal used in the experiments. The authors also thank Alan Yamamura, Seiji Kobayashi, and the Sony Corporation for assistance with the optical-disk-writing system.
Subject Keywords:Associative memory, optical disk, image correlation, photorefractive media
Record Number:CaltechAUTHORS:NEIao93a
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:NEIao93a
Alternative URL:http://www.opticsinfobase.org/abstract.cfm?URI=ao-32-23-4398
Official Citation:M. A. Neifeld and D. Psaltis, "Programmable image associative memory using an optical disk and a photorefractive crystal," Appl. Opt. 32, 4398- (1993) http://www.opticsinfobase.org/abstract.cfm?URI=ao-32-23-4398
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:10994
Collection:CaltechAUTHORS
Deposited By: Archive Administrator
Deposited On:22 Jun 2008
Last Modified:29 Aug 2014 14:36

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