An optical security system based on a correlation between two separate binary
computer-generated holograms has been developed and experimentally tested. The
two holograms are designed using two different iterative algorithms: the projection-
onto constrained sets algorithm and the direct binary search (DBS) algorithm.
By placing the ready-to-use holograms on a modified joint transform correlator input
plane, an output image is constructed as a result of a spatial correlation between the
two functions coded by the holograms. Both simulation and experimental results are
presented to demonstrate the system's performance. While we concentrate mainly on
the DBS algorithm, we also compare the performance of both algorithms.
© 2006 Optical Society of America
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