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Optical Engineering

Real-time binary phase-only circular harmonic filters using a liquid crystal television in the Fourier plane of an optical correlator
Author(s): Jean-Jacques P. Drolet; Luc Leclerc; Yunlong Sheng; Henri H. Arsenault
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Paper Abstract

A rotation invariant optical correlator using a low-cost, liquid crystal television (LCTV) in the Fourier plane is described. The performance of the LCTV used as a filter support medium is evaluated, using interferometric measurements and an image reconstruction experiment. Different operating modes of an LCTV suitable for encoding binary phase-only filters are discussed. Finally, a modified LCTV is used in the filter plane of a conventional 4-f correlator to encode unipolar binary phase-only matched filters and unipolar binary phase-only circular harmonic filters. Optical experimental results are compared with the results of computer experiments.

Paper Details

Date Published: 1 May 1992
PDF: 8 pages
Opt. Eng. 31(5) doi: 10.1117/12.56165
Published in: Optical Engineering Volume 31, Issue 5
Show Author Affiliations
Jean-Jacques P. Drolet, California Institute of Technology (United States)
Luc Leclerc, National Optics Institute (Canada)
Yunlong Sheng, Univ. Laval (Canada)
Henri H. Arsenault, Univ. Laval (Canada)

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