Real-time computer-aided multiplexed optical intensity correlator using Fresnel holographic filters and a liquid crystal television

Zhao-Qi Wang, W. Allan Gillespie, Colin M. Cartwright, C. Soutar

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A real-time computer-aided optical intensity correlator using multiplexed Fresnel holographic filters (FHFs) and a liquid crystal television (LCTV) is described. This technique is characterized by the following. The spatially separated multichannel filters are fabricated by a single exposure holographic recording; the multiplexed optical correlator is simple in structure with low alignment requirements; the spatial phase variation existing inherently in the LCTV has no influence on the correlation pattern and the system has a higher discrimination by means of computer preprocessing. Several experimental results are presented.
Original languageEnglish
Pages (from-to)19-24
Number of pages6
JournalOptics Communications
Issue number1
Publication statusPublished - 15 Oct 1991


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