Optical continuous phase-only correlator using liquid crystal television

Yunlong Sheng; Gilles Paul-Hus

doi:10.1117/12.163626

9 November 1993 Optical continuous phase-only correlator using liquid crystal television

Yunlong Sheng, Gilles Paul-Hus

Proceedings Volume 2026, Photonics for Processors, Neural Networks, and Memories; (1993) https://doi.org/10.1117/12.163626
Event: SPIE's 1993 International Symposium on Optics, Imaging, and Instrumentation, 1993, San Diego, CA, United States

Abstract

We use a commercially available liquid crystal television (LCTV) for encoding real-time on- axis continuous phase-only filter (POF) in a Vander Lugt type optical correlator. We show by theory and experiments that filter coded on the LCTV with phase mismatching and coupled amplitude modulation maintains a term that is the true POF with a diffraction efficiency to about 70%, plus a zero order spot. The correlation output is a superposition of the POF correlation peak with an image of the input. The filter, referred as to 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.

Citation Download Citation

Yunlong Sheng and Gilles Paul-Hus "Optical continuous phase-only correlator using liquid crystal television", Proc. SPIE 2026, Photonics for Processors, Neural Networks, and Memories, (9 November 1993); https://doi.org/10.1117/12.163626

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