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OPTICAL ENCRYPTION

Optimization of encrypted holograms in optical security systems

[+] Author Affiliations
Mitsuhiro Yamazaki, Junji Ohtsubo

Shizuoka University, Faculty of Engineering, 3-5-1 Johoku, Hamamatsu, 432-8561, Japan E-mail: ohtsubo@eng.shizuoka.ac.jp

Opt. Eng. 40(1), 132-137 (Jan 01, 2001). doi:10.1117/1.1334947
History: Received Jan. 3, 2000; Revised May 1, 2000; Accepted July 28, 2000
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The method of the optimization for a binary phase hologram used in a security system is proposed. The hologram is made by a joint Fourier transform method and a simulated annealing technique is used for the optimization. A hologram of a fingerprint image with a random key reference is successfully optimized and almost the same image quality as the original one is obtained as a decoded image by the proposed method. The usefulness of the method in an optical security system is also discussed. © 2001 Society of Photo-Optical Instrumentation Engineers.

© 2001 Society of Photo-Optical Instrumentation Engineers

Citation

Mitsuhiro Yamazaki and Junji Ohtsubo
"Optimization of encrypted holograms in optical security systems", Opt. Eng. 40(1), 132-137 (Jan 01, 2001). ; http://dx.doi.org/10.1117/1.1334947


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