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Fourier Optical Signal Processors.
Rept. for Oct 1987-Sep 1989,
ROME AIR DEVELOPMENT CENTER GRIFFISS AFB NY
Pagination or Media Count:
Progress in Fourier optical processing techniques is reviewed with particular emphases on real-time pattern recognition, which recently has received increased interest as the result of new filter formulations that can be implemented with existing spatial light modulators. Architectures for coherent optical correlation, and the recently reported phase-only filters are reviewed. Smart filters which attack the inherent distortion sensitivity of correlation, are reviewed including those suitable for implementation with phase-only modulation. Correlation experiments implementing real-time variation of both input and reference patterns are reviewed. The potential for successful near- term application of these techniques is defined.
APPROVED FOR PUBLIC RELEASE