Optical security based on phase additive using phase-only CGH

被引：0
|
作者：
Huang, Qizhong [1 ]
Du, Jinglei [1 ]
Zhang, Yixiao [1 ]
Su, Jingqin [1 ]
Gao, Fuhua [1 ]
Guo, Yongkang [1 ]
机构：
[1] Sichuan Univ, Chengdu, China
来源：
Zhongguo Jiguang/Chinese Journal of Lasers | 2000年 / 27卷 / 07期
关键词：
Holograms - Image coding - Safety devices - Security systems;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
An anti-counterfeiting means using phase-only CGH is presented in this paper. Two phase-only CGHs are made by decomposing the phase information into two parts. When single CGH is reconstructed, no information will be observed, while two combined phase-only CGHs alignment is reconstructed, the recorded information will be read out on the image plane. Any one of the CGH can act as the decoding key. Because the phase distribution on each CGH is random, it is very difficult to duplicate the identical decoding CGH.
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页码：645 / 648
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