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Proceedings Paper

Optical correlator architecture for the identification of many patterns with a multiplexed matched filter
Author(s): N. Manivannan; Mark A. A. Neil; Edward G. S. Paige
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Paper Abstract

We have investigated a novel coherent optical correlator architecture for both recognizing and distinguishing between a plurality of patterns using only a single fixed binary phase-only matched filter, referred to here as a multiplexed filter. In order to utilize the filer space effectively we have introduced a novel spread spectrum technique for coding the input patterns, so called overlay encoding, suing a random high frequency binary phase-only mask. We have shown how standard optimization techniques can be used to design a multiplexed filter, which is capable of producing a set of codes in the output plane when the corresponding elements of a set of input patterns are presented in the input plane. The theoretical analysis has been verified experimentally using commercially available ferroelectric liquid crystal spatial light modulators.

Paper Details

Date Published: 27 March 1997
PDF: 4 pages
Proc. SPIE 3073, Optical Pattern Recognition VIII, (27 March 1997);
Show Author Affiliations
N. Manivannan, Univ. of Oxford (United Kingdom)
Mark A. A. Neil, Univ. of Oxford (United Kingdom)
Edward G. S. Paige, Univ. of Oxford (United Kingdom)


Published in SPIE Proceedings Vol. 3073:
Optical Pattern Recognition VIII
David P. Casasent; Tien-Hsin Chao, Editor(s)

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