Optical secret sharing by multi-step liquid crystal planar doublet panning and coupling  

作　　者：Zhichang Mo Yi Chen Xiangyu Zhu Zhouhao Zhang Dawei Li Jianda Shao Yuanan Zhao Jianguo Wang 莫之畅;陈壹;朱翔宇;张洲豪;李大伟;邵建达;赵元安;王建国(Laboratory of Thin Film Optics,Shanghai Institute of Optics and Fine Mechanics,Chinese Academy of Sciences,Shanghai 201800,China;Center of Materials Science and Optoelectronics Engineering,University of Chinese Academy of Sciences,Beijing 100049,China;Key Laboratory of Materials for High Power Laser,Chinese Academy of Sciences,Shanghai 201800,China;Henan Key Laboratory of Infrared Materials&Spectrum Measures and Applications,School of Physics,Henan Normal University,Xinxiang 453007,China;Hangzhou Institute for Advanced Study,University of Chinese Academy of Sciences,Hangzhou 310024,China)

机构地区：[1]Laboratory of Thin Film Optics,Shanghai Institute of Optics and Fine Mechanics,Chinese Academy of Sciences,Shanghai 201800,China [2]Center of Materials Science and Optoelectronics Engineering,University of Chinese Academy of Sciences,Beijing 100049,China [3]Key Laboratory of Materials for High Power Laser,Chinese Academy of Sciences,Shanghai 201800,China [4]Henan Key Laboratory of Infrared Materials&Spectrum Measures and Applications,School of Physics,Henan Normal University,Xinxiang 453007,China [5]Hangzhou Institute for Advanced Study,University of Chinese Academy of Sciences,Hangzhou 310024,China

出　　处：《Chinese Optics Letters》2024年第8期21-28,共8页中国光学快报（英文版）

基　　金：supported by the National Natural Science Foundation of China(No. 52002271);CAS Special Research Assistant Project;China Postdoctoral Science Foundation (No. 2021M703326);Key Foreign Cooperation Projects of Bureau of International Cooperation of Chinese Academy of Sciences(No. 181231KYSB20210001);Cooperation Project with Hong Kong,Macao,Taiwan supported by Science and Technology Commission of Shanghai Municipality(No. 22220760300)。

摘　　要：The hologram, which is formed by phases coupled through cascade devices for secret information sharing, still carries a cracking risk. We propose a liquid crystal planar doublet as the information carrier, and new holograms generated by the new coupled phases when the relative displacements of the different liquid crystal layers change. The designed geometrical phases are generated by an optimized iterative restoration algorithm, and each holographic image formed by these phases is readable. This scheme achieves an increase in the capacity of the stored secret information and provides more misdirection, which is expected to have potential value in optical steganography and storage.

关 键 词：liquid crystal HOLOGRAPHY optical steganography displacement coupled geometrical phase 

分 类 号：TP309.7[自动化与计算机技术—计算机系统结构]