High-speed camera-sized optical wavelet processor

Tien-Hsin Chao; Youngchul Park; George F. Reyes

doi:10.1117/12.270365

27 March 1997 High-speed camera-sized optical wavelet processor

Tien-Hsin Chao, Youngchul Park, George F. Reyes

Proceedings Volume 3073, Optical Pattern Recognition VIII; (1997) https://doi.org/10.1117/12.270365
Event: AeroSense '97, 1997, Orlando, FL, United States

Abstract

A compact, ultrahigh-speed, optical correlator using bipolar-amplitude-valued filtering is described. The system compactness and high speed is achieved by utilizing a newly developed nematic twist liquid crystal SLM by KOPIN as the input SLM and a ferroelectric liquid crystal SLM, optics design, and miniature packaging components. The utilization of a ferroelectric spatial light modulator (SLM) developed by Boulder Nonlinear System (BNS) in the Fourier transform domain of the optical correlator has enabled the bipolar- amplitude modulation for filter synthesis. The unique bipolar-amplitude modulation characteristics of the BNS SLM has made possible the design of real-valued spatial filters for pattern recognition. We have demonstrated the superiority of this real-valued filter for higher signal-to- noise-ratio correlation under cluttered environment. Moreover, the real-valued filter synthesis capability also allow us to extend the processing capability from mere optical correlation to optical wavelet transform, optical morphological processing and many other processing operations.

Citation Download Citation

Tien-Hsin Chao, Youngchul Park, and George F. Reyes "High-speed camera-sized optical wavelet processor", Proc. SPIE 3073, Optical Pattern Recognition VIII, (27 March 1997); https://doi.org/10.1117/12.270365

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