Real-time optical correlator using computer-generated holographic filter on a liquid crystal light valve

Tien-Hsin Chao; Jeffrey W. Yu

doi:10.1117/12.23410

27 December 1990 Real-time optical correlator using computer-generated holographic filter on a liquid crystal light valve

Tien-Hsin Chao, Jeffrey W. Yu

Author Affiliations +

Proceedings Volume 1347, Optical Information Processing Systems and Architectures II; (1990) https://doi.org/10.1117/12.23410
Event: 34th Annual International Technical Symposium on Optical and Optoelectronic Applied Science and Engineering, 1990, San Diego, CA, United States

Abstract

Limitations associated with the binary phase-only filter often used in optical correlators are presently circumvented in the writing of complex-valued data on a gray-scale spatial light modulator through the use of a computer-generated hologram (CGH) algorithm. The CGH encodes complex-valued data into nonnegative real CGH data in such a way that it may be encoded in any of the available gray-scale spatial light modulators. A CdS liquid-crystal light valve is used for the complex-valued CGH encoding; computer simulations and experimental results are compared, and the use of such a CGH filter as the synapse hologram in a holographic optical neural net is discussed.

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Tien-Hsin Chao and Jeffrey W. Yu "Real-time optical correlator using computer-generated holographic filter on a liquid crystal light valve", Proc. SPIE 1347, Optical Information Processing Systems and Architectures II, (27 December 1990); https://doi.org/10.1117/12.23410

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