Interference anticounterfeiting using computer-generated hologram

Qizhong Huang; Jinglei Du; Yixiao Zhang; Yongkang Guo

doi:10.1117/12.354747

19 July 1999 Interference anticounterfeiting using computer-generated hologram

Qizhong Huang, Jinglei Du, Yixiao Zhang, Yongkang Guo

Proceedings Volume 3749, 18th Congress of the International Commission for Optics; (1999) https://doi.org/10.1117/12.354747
Event: ICO XVIII 18th Congress of the International Commission for Optics, 1999, San Francisco, CA, United States

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.

Citation Download Citation

Qizhong Huang, Jinglei Du, Yixiao Zhang, and Yongkang Guo "Interference anticounterfeiting using computer-generated hologram", Proc. SPIE 3749, 18th Congress of the International Commission for Optics, (19 July 1999); https://doi.org/10.1117/12.354747

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