Polarization encoding for optical security systems

Bahram Javidi; Takanori Nomura

doi:10.1117/12.363965

1 October 1999 Polarization encoding for optical security systems

Bahram Javidi, Takanori Nomura

Proceedings Volume 3804, Algorithms, Devices, and Systems for Optical Information Processing III; (1999) https://doi.org/10.1117/12.363965
Event: SPIE's International Symposium on Optical Science, Engineering, and Instrumentation, 1999, Denver, CO, United States

Abstract

An idea for security verification of identification such as passports, credit cards, and others in terms of difficulty of reproduction is proposed. The polarization information is used for security verification. As the state of the polarization encoded cannot be seen by an ordinary intensity sensitive device such as a CCD camera, it cannot be copied. For optical validation system, a joint transform correlator is used. Computer simulations and optical experimental results are shown to confirm our proposed method.

Citation Download Citation

Bahram Javidi and Takanori Nomura "Polarization encoding for optical security systems", Proc. SPIE 3804, Algorithms, Devices, and Systems for Optical Information Processing III, (1 October 1999); https://doi.org/10.1117/12.363965

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