Updatable filters for correlation with incoherent light

Shahar Gorodeisky; Asher A. Friesem

doi:10.1117/12.211201

Abstract

We investigated how best to record phase filters on a spatial light modulator (SLM) in a hybrid optic-electronic correlator that operates with incoherent light. The SLM used in our experiments was the Hughes liquid crystal light valve (LCLV), on which we recorded phase filters having 256 by 256 pixels. Two correlation configurations were tested in which the input scenes contained 512 by 512 pixels. In one, the input scene was introduced by means of a transparency that was illuminated by a laser beam that emerged from a rotating diffuser. In the other, the input scene was displayed on a miniature monochromatic cathode ray tube (CRT). The experimental results with both configurations reveal that real time updatability of optical filters for correlation with incoherent light is indeed possible. The analysis, correlation configurations and experimental procedures and results are presented.

Citation Download Citation

Shahar Gorodeisky, Asher A. Friesem, "Updatable filters for correlation with incoherent light", Proc. SPIE 2426, 9th Meeting on Optical Engineering in Israel, (6 June 1995); doi: 10.1117/12.211201; https://doi.org/10.1117/12.211201

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