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Optics Letters

Optics Letters


  • Editor: Anthony J. Campillo
  • Vol. 31, Iss. 17 — Sep. 1, 2006
  • pp: 2562–2564

Optical encryption using phase-shifting interferometry in a joint transform correlator

Cecilia La Mela and Claudio Iemmi  »View Author Affiliations

Optics Letters, Vol. 31, Issue 17, pp. 2562-2564 (2006)

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We propose an optical encryption technique where the encrypted field and the decrypting key are obtained by three-step phase-shifting interferometry and registered as digital Fresnel holograms in a joint transform correlator architecture. Decryption can be achieved by digital or optical means. The technique allows the complete process to be achieved at high speed and data to be transfered via digital communication channels. Experimental implementation is performed in a system based on a programmable liquid-crystal TV display working in pure phase mode to represent the input data and to introduce the required phase shifts. A CCD is used to register the output data.

© 2006 Optical Society of America

OCIS Codes
(070.4560) Fourier optics and signal processing : Data processing by optical means
(090.2880) Holography : Holographic interferometry
(100.3010) Image processing : Image reconstruction techniques
(100.4550) Image processing : Correlators
(120.5050) Instrumentation, measurement, and metrology : Phase measurement
(230.3720) Optical devices : Liquid-crystal devices

ToC Category:
Fourier Optics and Optical Signal Processing

Original Manuscript: April 3, 2006
Revised Manuscript: May 16, 2006
Manuscript Accepted: May 23, 2006
Published: August 9, 2006

Cecilia La Mela and Claudio Iemmi, "Optical encryption using phase-shifting interferometry in a joint transform correlator," Opt. Lett. 31, 2562-2564 (2006)

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