Share Email Print
cover

Proceedings Paper

Dual-template optical correlator with interferometric detection for improved discrimination
Author(s): Freddie Yun Heng Chin; Michael G. Somekh; John A. Crowe
Format Member Price Non-Member Price
PDF $14.40 $18.00
cover GOOD NEWS! Your organization subscribes to the SPIE Digital Library. You may be able to download this paper for free. Check Access

Paper Abstract

A novel coherent optical processor for discriminating between similar patterns is described. A multiplexed hologram of two complex spatial filters (CSF) synthesized with a common reference beam provides the correlation. The two halves of the template pattern are encoded in the two CSFs. The response of the system consists of two sets of reconstructed waves that interfere at the output plane. One set of the waves is made to phase shift with respect to the other. A phase shifting interferometric technique extracts the product of the two correlation signals. Results are shown to demonstrate improved discrimination over a traditional optical correlator.

Paper Details

Date Published: 2 March 1993
PDF: 10 pages
Proc. SPIE 1732, Holographics International '92, (2 March 1993); doi: 10.1117/12.140404
Show Author Affiliations
Freddie Yun Heng Chin, Univ. of Nottingham (United Kingdom)
Michael G. Somekh, Univ. of Nottingham (United Kingdom)
John A. Crowe, Univ. of Nottingham (United Kingdom)


Published in SPIE Proceedings Vol. 1732:
Holographics International '92

© SPIE. Terms of Use
Back to Top