REAL-TIME BINARY PHASE-ONLY CIRCULAR HARMONIC FILTERS USING A LIQUID-CRYSTAL TELEVISION IN THE FOURIER PLANE OF AN OPTICAL CORRELATOR

被引：4

作者：

DROLET, JJP ^{[1
]}

LECLERC, L ^{[1
]}

SHENG, YL ^{[1
]}

ARSENAULT, HH ^{[1
]}

机构：

[1] UNIV LAVAL, CTR OPT PHOTON & LASER, QUEBEC CITY G1K 7P4, QUEBEC, CANADA

来源：

OPTICAL ENGINEERING | 1992年 / 31卷 / 05期

关键词：

INFORMATION PROCESSING; LIQUID CRYSTAL TELEVISION; BINARY PHASE-ONLY FILTER; CIRCULAR HARMONIC FILTER;

D O I：

10.1117/12.56165

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

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.

引用

页码：939 / 946

页数：8

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