Abstract

Theoretical studies of the multiplexing capabilities of binary phase-only filters (BPOF) for use in optical correlator systems are presented. We show that the BPOF has an inherent capability for simultaneously recognizing an object and an inverted version of the object. More complex multiplexing capabilities are examined including (1) use of a BPOF made from eight rotated versions of a letter to recognize any of the rotated input letters, (2) use of a BPOF made using the fifty-two letters of the alphabet (upper and lower case) to recognize any one letter, and (3) use of a BPOF made from a complex sentence to pick out a desired word. Finally, we present additional information on the generation of the BPOF using a MacIntosh computer system.

© 1987 Optical Society of America

Optical correlator performance of binary phase-only filters using Fourier and Hartley transforms

Don M. Cottrell, Roger A. Lilly, Jeffrey A. Davis, and Timothy Day
Appl. Opt. 26(18) 3755-3761 (1987)

High efficiency optical reconstruction of binary phase-only filters using the Hughes liquid crystal light valve

Jeffrey A. Davis, Gail M. Heissenberger, Roger A. Lilly, Don M. Cottrell, and Michael F. Brownell
Appl. Opt. 26(5) 929-933 (1987)

Reduction of false correlations with binary phase-only filters

Thomas H. Barnes, Kiyofumi Matsuda, and Naotake Ooyama
Appl. Opt. 27(18) 3785-3790 (1988)

Phase-encoded binary filters for optical pattern recognition

Jeffrey A. Davis, Don M. Cottrell, Glenn W. Bach, and Roger A. Lilly
Appl. Opt. 28(2) 258-261 (1989)

Optical binary phase-only filters for circular harmonic correlations

Luc Leclerc, Yunlong Sheng, and Henry H. Arsenault
Appl. Opt. 30(32) 4643-4649 (1991)