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Proceedings Paper

Phase filter multiplexing for pattern recognition process
Author(s): Mirta Villarreal; Claudio C. Iemmi; Juan Campos
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Paper Abstract

Usually filters used in optical correlators are holograms, digitally or optically synthesized, that store the phase information of the objet by encoding it in an amplitude media. The impulse response produced by these kinds of filters presents, beside the image of the object, the conjugate one. Thus, the number of channels available in the correlation plane is reduced. We present here a method to directly store the phase information of the objects in a liquid crystal television display working in phase-only mode. In that way the conjugate image of the object is not present in the impulse response of the filter. We introduce two different types of composed filters and compare the results obtained experimentally and by numerical simulation.

Paper Details

Date Published: 14 August 2001
PDF: 4 pages
Proc. SPIE 4419, 4th Iberoamerican Meeting on Optics and 7th Latin American Meeting on Optics, Lasers, and Their Applications, (14 August 2001); doi: 10.1117/12.437067
Show Author Affiliations
Mirta Villarreal, Univ. de Buenos Aires (Argentina)
Claudio C. Iemmi, Univ. de Buenos Aires (Argentina)
Juan Campos, Univ. Autonoma de Barcelona (Spain)


Published in SPIE Proceedings Vol. 4419:
4th Iberoamerican Meeting on Optics and 7th Latin American Meeting on Optics, Lasers, and Their Applications

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