Security and encryption optical systems based on a correlator with significant output images

被引：151

作者：

Li, YZ ^{[1
]}

Kreske, K ^{[1
]}

Rosen, J ^{[1
]}

机构：

[1] Ben Gurion Univ Negev, Dept Elect & Comp Engn, IL-84105 Beer Sheva, Israel

来源：

APPLIED OPTICS | 2000年 / 39卷 / 29期

关键词：

D O I：

10.1364/AO.39.005295

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

An improved optical security system based on two phase-only computer-generated masks is proposed. The two transparencies are placed together in a 4f correlator so that a known output image is received. In addition to simple verification, our security system is capable of identifying the type of input mask according to the corresponding output image it generates. The two phase masks are designed with an iterative optimization algorithm with constraints in the input and the output domains. A simulation is presented with the resultant images formed by the two phase-only elements. Various mask combinations are compared to show that a combination is unique and cannot be duplicated. This uniqueness is an advantage in security systems. (C) 2000 Optical Society of America. OCIS codes: 070.4550, 070.2580, 050.1950, 070.6110, 10.5090.

引用

页码：5295 / 5301

页数：7

共 9 条

[1]

JAVIDI B, 1994, OPT ENG, V33, P1752, DOI 10.1117/12.170736

[2] Noise performance of double-phase encryption compared to XOR encryption [J].

Javidi, B ;

Bernard, L ;

Towghi, N .

OPTICAL ENGINEERING, 1999, 38 (01) :9-19

[3] Optical security system with Fourier plane encoding [J].

Javidi, B ;

Ahouzi, E .

APPLIED OPTICS, 1998, 37 (26) :6247-6255

[4] Experimental demonstration of the random phase encoding technique for image encryption and security verification [J].

Javidi, B ;

Zhang, GS ;

Li, J .

OPTICAL ENGINEERING, 1996, 35 (09) :2506-2512

[5] ITERATIVE APPROACHES TO COMPUTER-GENERATED HOLOGRAPHY [J].

JENNISON, BK ;

ALLEBACH, JP ;

SWEENEY, DW .

OPTICAL ENGINEERING, 1989, 28 (06) :629-637

[6] OPTICAL-IMAGE ENCRYPTION BASED ON INPUT PLANE AND FOURIER PLANE RANDOM ENCODING [J].

REFREGIER, P ;

JAVIDI, B .

OPTICS LETTERS, 1995, 20 (07) :767-769

[7] LEARNING IN CORRELATORS BASED ON PROJECTIONS ONTO CONSTRAINT SETS [J].

ROSEN, J .

OPTICS LETTERS, 1993, 18 (14) :1183-1185

[8]

Stark H., 1987, IMAGE RECOVERY THEOR

[9] Random phase encoding for optical security [J].

Wang, RK ;

Watson, IA ;

Chatwin, C .

OPTICAL ENGINEERING, 1996, 35 (09) :2464-2469

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