Binary computer-generated holograms for security applications from a synthetic double-exposure method by electron-beam lithography

被引:53
作者
Yoshikawa, N [1 ]
Itoh, M [1 ]
Yatagai, T [1 ]
机构
[1] Univ Tsukuba, Inst Appl Phys, Tsukuba Adv Res Alliance, Ibaraki, Osaka, Japan
关键词
D O I
10.1364/OL.23.001483
中图分类号
O43 [光学];
学科分类号
070207 ; 0803 ;
摘要
We have developed a new multiplexing method for producing binary computer-generated holograms (CGH's) for security applications. This method is based on double recording of two types of coding method upon binary CGH's. The CGH synthesized by the proposed method can have multiple image planes from the region close to the hologram (image region) to infinity (Fraunhofer region) without severe degradation of reconstructed images in the image region. A CGH containing simultaneous image- and Fourier-type holograms is fabricated by electron-beam lithography. Some experimental results are presented. (C) 1998 Optical Society of America.
引用
收藏
页码:1483 / 1485
页数:3
相关论文
共 10 条