Liquid crystal real-time correlator with arbitrary bipolar real-valued input scenes

Ignacio Moreno, Juan Campos, Maria J. Yzuel

Research output: Contribution to journalArticleResearchpeer-review

Abstract

We present a real-time correlator that uses two liquid crystal spatial light modulators (SLM) to introduce the input scene and the matched filter. These liquid crystal SLMs are two twisted nematic panels that, under proper conditions, can produce amplitude-mostly or phase-mostly modulation. We propose different techniques for the implementation of bipolar real-valued scenes (with positive and negative values) in SLMs that produce amplitude-only and phase-only modulation. We apply these techniques to the implementation of bipolar real-valued scenes in a colour patten recognition problem.
Original languageEnglish
Pages (from-to)125-127
JournalGuangdianzi Jiguang/Journal of Optoelectronics Laser
Volume9
Publication statusPublished - 1 Jan 1998

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