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Optical Engineering

Security optical systems based on a joint transform correlator with significant output images
Author(s): David Abookasis; Ortal Arazi; Joseph Rosen; Bahram Javidi
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Paper Abstract

An improved optical security system based on correlation between two phase-only computer generated masks is proposed. The two phase masks are placed together at the input plane of a joint transform correlator. A priori known output image is obtained in the system output only if one mask is the right key for the other mask. In addition to a simple verification, our security system is capable of identifying the type of an input mask according to the corresponding output image that it generates. The two phase masks are designed using an iterative optimization algorithm with constraints in the input and output domains. Computer simulations are presented with the resultant images formed by the two phase-only elements.

Paper Details

Date Published: 1 August 2001
PDF: 6 pages
Opt. Eng. 40(8) doi: 10.1117/1.1388208
Published in: Optical Engineering Volume 40, Issue 8
Show Author Affiliations
David Abookasis, Ben-Gurion Univ. of the Negev (Israel)
Ortal Arazi, Ben-Gurion Univ. (Israel)
Joseph Rosen, Ben-Gurion Univ. of the Negev (Israel)
Bahram Javidi, Univ. of Connecticut (United States)

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