Real-time binary phase-only circular harmonic filters using a liquid crystal television in the Fourier plane of an optical correlator

Jean-Jacques P. Drolet; Luc Leclerc; Yunlong Sheng; Henri H. Arsenault

doi:10.1117/12.56165

1 May 1992 Real-time binary phase-only circular harmonic filters using a liquid crystal television in the Fourier plane of an optical correlator

Jean-Jacques P. Drolet, Luc Leclerc, Yunlong Sheng, Henri H. Arsenault

Author Affiliations +

Optical Engineering, Vol. 31, Issue 5, (May 1992). https://doi.org/10.1117/12.56165

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.

Citation Download Citation

Jean-Jacques P. Drolet, Luc Leclerc, Yunlong Sheng, and Henri H. Arsenault "Real-time binary phase-only circular harmonic filters using a liquid crystal television in the Fourier plane of an optical correlator," Optical Engineering 31(5), (1 May 1992). https://doi.org/10.1117/12.56165

Published: 1 May 1992

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