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Proceedings Paper

Phase Only Liquid Crystal Light Modulator And Its Application In The Fourier Plane Of Optical Correlation Systems
Author(s): Thomas H. Barnes; Kenji Matsumoto; Tomoaki Eiju; Kiyofumi Matsuda; Naotake Ooyama
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Paper Abstract

It has been shown theoretically that optical correlation systems which use phase only filters are capable of producing sharp correlation peaks and good discrimination between different input objects, whilst at the same time having high optical efficiency. In addition to this, the resolution required in the filter plane is very much lower than that required for an equivalent conventional Van der Lugt correlator using a matched filter which has been made holographically. Here, we describe a flexible phase only filter implemented using a special-purpose liquid crystal spatial light modulator, and present results which demonstrate how it can be applied in optical correlation systems.

Paper Details

Date Published: 25 October 1989
PDF: 5 pages
Proc. SPIE 1134, Optical Pattern Recognition II, (25 October 1989); doi: 10.1117/12.961635
Show Author Affiliations
Thomas H. Barnes, Mechanical Engineering Laboratory (Japan)
Kenji Matsumoto, Citizen Watch Co. Ltd. (Japan)
Tomoaki Eiju, Mechanical Engineering Laboratory (Japan)
Kiyofumi Matsuda, Mechanical Engineering Laboratory (Japan)
Naotake Ooyama, Mechanical Engineering Laboratory (Japan)


Published in SPIE Proceedings Vol. 1134:
Optical Pattern Recognition II

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