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24 December 1980 Digital Correlation By Optical Convolution/Correlation
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Attention is given to various methods by which the accuracy achieveable and the dynamic range requirements of an optical computer can be enhanced. A new time position coding acousto-optic technique for optical residue arithmetic processing is presented and experimental demonstration is included. Major attention is given to the implementation of a correlator operating on digital or decimal encoded signals. Using a convolution description of multiplication, we realize such a correlator by optical convolution in one dimension and optical correlation in the other dimension of a optical system. A coherent matched spatial filter system operating on digital encoded signals, a noncoherent processor operating on complex-valued digital-encoded data, and a real-time multi-channel acousto-optic system for such operations are described and experimental verifications are included.
© (1980) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Joel Trimble, David Casasent, Demetri Psaltis, Frank Caimi, Mark Carlotto, and Deborah Neft "Digital Correlation By Optical Convolution/Correlation", Proc. SPIE 0241, Real-Time Signal Processing III, (24 December 1980);


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