CIOP 05384
CENTRO DE INVESTIGACIONES OPTICAS
Unidad Ejecutora - UE
artículos
Título:
Lateral shift multiplexing with a modified random mask in a JTC encrypting architecture
Autor/es:
EDGAR RUEDA; JOHN BARRERA; RODRIGO HENAO; ROBERTO TORROBA
Revista:
OPTICAL ENGINEERING
Editorial:
SPIE
Referencias:
Lugar: Bellingham, USA; Año: 2009 vol. 48 p. 270061 - 270066
ISSN:
0091-3286
Resumen:
The joint transform correlator JTC is a classical optical architecture, recently associated with interesting applications in optical security. In addition, multiplexing is a tactic associated with optical encrypting mechanisms that provide security for multiple users. However, experimental constraints arise when we intend to reproduce a diffuser shifting multiplexing option. This is due to the invariance to lateral shifts under a JTC setup. To overcome this problem, we propose a setup modi-fication that allows its use under a multiplexing approach. Instead of placing the encrypting mask in contact with the input JTC plane, we use the actual optical Fourier transform of a diffuser projected over the entrance plane of the JTC. We present a theoretical explanation, along with computer simulations and experimental results, that support our proposal.
