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Space-variant optical correlation by the use of random binary phase modulation 

Author: Ruikang K. Wang a
Affiliation:   a Centre for Science and Technology in Medicine, School of Postgraduate Medicine, Keele University, Stoke-on-Trent, England
DOI: 10.1080/09500349808231922
Publication Frequency: 21 issues per year
Published in: journal Journal of Modern Optics, Volume 45, Issue 3 March 1998 , pages 653 - 659
Formats available: PDF (English)
Previously published as: Optica Acta: International Journal of Optics (0030-3909) until 1987
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Abstract

A simple method to achieve space-variant pattern recognition is proposed with a typical VanderLugt arrangement, in which the input pattern is modulated by a random binary phase function. The output correlation location can be programmed into the filter function. With the introduction of random binary phase modulation, the impulse response of either phase-only or binary phase-only filter function is not edge enhanced, resulting in higher Horner efficiency. Computer simulations are conducted to verify the proposed method.
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