Abstract
Conventional phase-shifting interferometry (PSI) needs at least three interferograms. A novel algorithm of two-step PSI, with an arbitrary known phase step, by which a complex object field can be reconstructed with only two interferograms is proposed. This algorithm is then applied to an information security system based on double random-phase encoding in the Fresnel domain. The feasibility of this method and its robustness against occlusion and additional noise attacks are verified by computer simulations. This approach can considerably improve the efficiency of data transmission and is very suitable for Internet use.
© 2006 Optical Society of America
Full Article | PDF ArticleMore Like This
Lu-Zhong Cai, Ming-Zhao He, Qing Liu, and Xiu-Lun Yang
Appl. Opt. 43(15) 3078-3084 (2004)
Xiang-Feng Meng, Lu-Zhong Cai, Xiu-Lun Yang, Xian-Feng Xu, Guo-Yan Dong, Xiao-Xia Shen, Hao Zhang, and Yu-Rong Wang
Appl. Opt. 46(21) 4694-4701 (2007)
Xiang Peng, Peng Zhang, Hengzheng Wei, and Bin Yu
Opt. Lett. 31(8) 1044-1046 (2006)