Polarization encoding for optical encryption using twisted nematic liquid crystal spatial light modulators

被引：28

作者：

Cheng, CJ ^{[1
]}

Chen, ML ^{[1
]}

机构：

[1] Natl Taipei Univ Technol, Dept ElectroOpt Engn, Taipei 10608, Taiwan

来源：

OPTICS COMMUNICATIONS | 2004年 / 237卷 / 1-3期

关键词：

optical encryption; spatial light modulator; liquid crystal display;

D O I：

10.1016/j.optcom.2004.03.060

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We propose and demonstrate a polarization-encoded encryption system based on a doubly exclusive OR logic (XOR) operation using cascaded twisted nematic liquid crystal spatial light modulators. The transfer characteristic of the encryption system is analyzed by the Jones matrix method to yield the suitable polarization modulation for optical realization. An experimental demonstration reveals that the binary image encryption/decryption is achieved with fair image quality by selecting the orientation of polarization and the modulation conditions. Both analytical and experimental results are presented and discussed. (C) 2004 Elsevier B.V. All rights reserved.

引用

页码：45 / 52

页数：8

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