Security and Encryption Optical Systems Based on a Correlator with Significant Output Images
Applied Optics, Vol. 39, Issue 29, pp. 5295-5301 (2000)
http://dx.doi.org/10.1364/AO.39.005295
Acrobat PDF (1799 KB)
Abstract
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.
© 2000 Optical Society of America
[Optical Society of America ]
OCIS Codes
(050.1950) Diffraction and gratings : Diffraction gratings
(070.2580) Fourier optics and signal processing : Paraxial wave optics
(070.4550) Fourier optics and signal processing : Correlators
(070.6110) Fourier optics and signal processing : Spatial filtering
(100.5090) Image processing : Phase-only filters
Citation
Youzhi Li, Kathi Kreske, and Joseph Rosen, "Security and Encryption Optical Systems Based on a Correlator with Significant Output Images," Appl. Opt. 39, 5295-5301 (2000)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-39-29-5295
You do not have subscription access to this journal. Citation lists with outbound citation links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.
Contact your librarian or system administrator
or
Log in to access OSA Member Subscription
You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.
Contact your librarian or system administrator
or
Log in to access OSA Member Subscription
You do not have subscription access to this journal. Article level metrics are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.
Contact your librarian or system administrator
or
Log in to access OSA Member Subscription
Related Journal Articles 
- Three-Dimensional Joint Transform Correlator (AO)
- Three-Dimensional Pattern Recognition with a Single Two-Dimensional Synthetic Reference Function (AO)
- Three-Dimensional Optical Correlator with General Complex Filters (AO)
- Hidden Images in Halftone Pictures (AO)
- Diffractive Optical Elements as Raster-Image Generators (AO)
« Previous Article | Next Article »
OSA is a member of 