Geometrical phase image encryption obtained with space-variant subwavelength gratings

被引：40

作者：

Biener, G ^{[1
]}

Niv, A ^{[1
]}

Kleiner, V ^{[1
]}

Hasman, E ^{[1
]}

机构：

[1] Technion Israel Inst Technol, Fac Mech Engn, Opt Engn Lab, IL-32000 Haifa, Israel

来源：

OPTICS LETTERS | 2005年 / 30卷 / 10期

关键词：

D O I：

10.1364/OL.30.001096

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

An optical encryption method based on a geometrical phase produced by space-variant polarization manipulation is presented. The decrypted picture is retrieved either by a polarization measurement of the beam emerging from the encrypted element or by a single intensity measurement of the beam transmitted through the encrypted element followed by an optical key element. Both elements are realized by use of computer-generated space-variant subwavelength dielectric gratings. Theoretical analyses of the optical concept are presented along with experimental results. (c) 2005 Optical Society of America.

引用

页码：1096 / 1098

页数：3

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