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Optical Engineering

Translation sensitivity adjustable compact optical correlator and its application for fingerprint recognition
Author(s): Luzhong Cai; Yahong Jin; Shaomin Zhou; Pochi Yeh; Neville I. Marzwell; Hua-Kuang Liu
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Paper Abstract

A translation sensitivity adjustable compact optical correlator (TSACOC) utilizing a convergent reference wave has been designed and tested. Its properties and performances, including the location of the correlation peak and the effects of lateral and longitudinal displacements for both filters and input images, are systematically analyzed based on the nonparaxial approximation for the reference beam. The theoretical analyses have been verified in experiments. By discussing the practical problems encountered, we have found that the tolerance of the system to the input lateral displacement can be conveniently increased by changing a geometric factor of the system. This property is very important to a TSACOC with a pinhole aperture attached to an ordinary detector at a fixed place. In addition, the effectiveness of the TSACOC for fingerprint recognition is also presented.

Paper Details

Date Published: 1 February 1996
PDF: 8 pages
Opt. Eng. 35(2) doi: 10.1117/1.600910
Published in: Optical Engineering Volume 35, Issue 2
Show Author Affiliations
Luzhong Cai, Shandong Univ. (China)
Yahong Jin, Lumin, Inc. (United States)
Shaomin Zhou, Beckman Instruments, Inc. (United States)
Pochi Yeh, Univ. of California/Santa Barbara (United States)
Neville I. Marzwell, Jet Propulsion Lab. (United States)
Hua-Kuang Liu, Univ. of South Alabama (United States)

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