Optical on-axis real-time phase-dominant correlator using liquid crystal television

Gilles Paul-Hus; Yunlong Sheng

doi:10.1117/12.154105

1 September 1993 Optical on-axis real-time phase-dominant correlator using liquid crystal television

Gilles Paul-Hus, Yunlong Sheng

Author Affiliations +

Optical Engineering, Vol. 32, Issue 9, (September 1993). https://doi.org/10.1117/12.154105

Abstract

We use a commercially available liquid crystal television (LCTV) for encoding the on-axis phase-only filter (POF) in a real-time VanderLugt-type optical correlator. Diffraction theory, computer simulation, and optical experiments show that the coupled amplitude modulation and the phase mismatching in the LCTV yield a zero-order spot in the response of the POF and reduce the diffraction efficiency to about 60 to 70%. The correlation output of the filter is a superposition of the POF correlation peak and an image of the input. The filter, referred to as the phase-dominant filter, behaves like the POF with advantages of on-axis correlation, high light efficiency, and utilization of all the available space bandwidth product of the LCTV. Optical experimental results are shown.

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Gilles Paul-Hus and Yunlong Sheng "Optical on-axis real-time phase-dominant correlator using liquid crystal television," Optical Engineering 32(9), (1 September 1993). https://doi.org/10.1117/12.154105

Published: 1 September 1993

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