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Real-time binary phase-only circular harmonic filters using a liquid crystal television in the Fourier plane of an optical correlator

Drolet, Jean-Jacques P. and Leclerc, Luc and Sheng, Yunlong and Arsenault, Henri H. (1992) Real-time binary phase-only circular harmonic filters using a liquid crystal television in the Fourier plane of an optical correlator. Optical Engineering, 31 (5). pp. 939-946. ISSN 0091-3286. https://resolver.caltech.edu/CaltechAUTHORS:20190221-110527145

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Abstract

A rotation invariant optical correlator using a low-cost, liquid crystal television (LCTV) in the Fourier plane is described. The performance of the LCTV used as a filter support medium is evaluated, using interferometric measurements and an image reconstruction experiment. Different operating modes of an LCTV suitable for encoding binary phase-only filters are discussed. Finally, a modified LCTV is used in the filter plane of a conventional 4-f correlator to encode unipolar binary phase-only matched filters and unipolar binary phase-only circular harmonic filters. Optical experimental results are compared with the results of computer experiments.


Item Type:Article
Related URLs:
URLURL TypeDescription
https://doi.org/10.1117/12.56165DOIArticle
Additional Information:© 1992 Society of Photo-Optical Instrumentation Engineers (SPIE). Paper IP-005 received Aug. 7, 1991; revised manuscript received Dec. 12, 1991; accepted for publication Jan. 20, 1992. We express our gratitude to Lin Li for his help during the interferometric measurements. This research was supported in part by the Natural Sciences and Engineering Research Council of Canada and the Fonds pour la Formation des Chercheurs et l'Aide à la Recherche du Québec.
Funders:
Funding AgencyGrant Number
Natural Sciences and Engineering Research Council of Canada (NSERC)UNSPECIFIED
Fonds pour la Formation des Chercheurs et l'Aide à la Recherche du QuébecUNSPECIFIED
Subject Keywords:information processing; liquid crystal television; binary phase-only filter; circular harmonic filter
Issue or Number:5
Record Number:CaltechAUTHORS:20190221-110527145
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20190221-110527145
Official Citation:Jean-Jacques P. Drolet, Luc Leclerc, Yunlong Sheng, and Henri H. Arsenault "Real-time binary phase-only circular harmonic filters using a liquid crystal television in the Fourier plane of an optical correlator," Optical Engineering 31(5), (1 May 1992). https://doi.org/10.1117/12.56165
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:93139
Collection:CaltechAUTHORS
Deposited By: George Porter
Deposited On:22 Feb 2019 18:48
Last Modified:03 Oct 2019 20:51

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