Lateral shift multiplexing with a modified random mask in a joint transform correlator encrypting architecture

Edgar Rueda; John Fredy Barrera Ramírez; Rodrigo H. Henao; Roberto Daniel Torroba

doi:10.1117/1.3080753

1 February 2009 Lateral shift multiplexing with a modified random mask in a joint transform correlator encrypting architecture

Edgar Rueda, John Fredy Barrera Ramírez, Rodrigo H. Henao, Roberto Daniel Torroba

Author Affiliations +

Optical Engineering, Vol. 48, Issue 2, 027006 (February 2009). https://doi.org/10.1117/1.3080753

Abstract

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 modification 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.

©(2009) Society of Photo-Optical Instrumentation Engineers (SPIE)

Citation Download Citation

Edgar Rueda, John Fredy Barrera Ramírez, Rodrigo H. Henao, and Roberto Daniel Torroba "Lateral shift multiplexing with a modified random mask in a joint transform correlator encrypting architecture," Optical Engineering 48(2), 027006 (1 February 2009). https://doi.org/10.1117/1.3080753

Published: 1 February 2009

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