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Proceedings Paper

Photorefractive temporal frequency band-pass, band-reject, and high-pass optical spatial filters using Michelson interferometry
Author(s): Antao Chen; Hongyu Ding; Shaoqing Fan
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Paper Abstract

Full optical implementation of band-pass, band-reject and high-pass temporal frequency spatial filters for amplitude images are proposed. These filters rely on the exponential temporal response of photorefractive crystals and the interference with phase conjugate beams. Band- pass and high-pass filters may be realized using a phase conjugate Michelson interferometer which has a difference in the response times between two arms, and band-reject filter using the interference between the output from a band-pass filter and a reference beam. The frequency characteristics of these filters are analyzed with numerical examples, and an analogy of these optical filters to corresponding electronic circuits is introduced.

Paper Details

Date Published: 1 March 1994
PDF: 7 pages
Proc. SPIE 2237, Optical Pattern Recognition V, (1 March 1994); doi: 10.1117/12.169444
Show Author Affiliations
Antao Chen, Univ. of Southern California (United States)
Hongyu Ding, Anhui Institute of Optics and Fine Mechanics (China)
Shaoqing Fan, Beijing Institute of Technology (China)


Published in SPIE Proceedings Vol. 2237:
Optical Pattern Recognition V
David P. Casasent; Tien-Hsin Chao, Editor(s)

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