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Proceedings Paper

Interference anticounterfeiting using computer-generated hologram
Author(s): Qizhong Huang; Jinglei Du; Yixiao Zhang; Yongkang Guo
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Paper Abstract

An anti-counterfeiting method using CGH phase coding is presented in this paper. The phase of a wave-front is coded by means of detour phase coding and then interfere with a reference wave, which is also generated by CGH. The object recorded in the hologram can be read out from the interference patterns. The object can be easily generated by computer, caught by CCD camera or scanner, both black-white and grayscale object can be used in our method. The features of this method lies in that it is flexible in designing, easy to observation and reconstructed by common expanding white light source. The reference wave can be a plane wave or another phase coding wave, then it's difficult to duplicate an identical CGH based on the decoding information, this made it enjoy a high anti-counterfeiting ability.

Paper Details

Date Published: 19 July 1999
PDF: 2 pages
Proc. SPIE 3749, 18th Congress of the International Commission for Optics, (19 July 1999); doi: 10.1117/12.354747
Show Author Affiliations
Qizhong Huang, Sichuan Univ. (China)
Jinglei Du, Sichuan Univ. (China)
Yixiao Zhang, Sichuan Univ. (China)
Yongkang Guo, Sichuan Univ. (China)

Published in SPIE Proceedings Vol. 3749:
18th Congress of the International Commission for Optics
Alexander J. Glass; Joseph W. Goodman; Milton Chang; Arthur H. Guenther; Toshimitsu Asakura, Editor(s)

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