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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 39, Iss. 14 — May. 10, 2000
  • pp: 2313–2320

Optoelectronic information encryption with phase-shifting interferometry

Enrique Tajahuerce, Osamu Matoba, Steven C. Verrall, and Bahram Javidi  »View Author Affiliations


Applied Optics, Vol. 39, Issue 14, pp. 2313-2320 (2000)
http://dx.doi.org/10.1364/AO.39.002313


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Abstract

A technique that combines the high speed and the high security of optical encryption with the advantages of electronic transmission, storage, and decryption is introduced. Digital phase-shifting interferometry is used for efficient recording of phase and amplitude information with an intensity recording device. The encryption is performed by use of two random phase codes, one in the object plane and another in the Fresnel domain, providing high security in the encrypted image and a key with many degrees of freedom. We describe how our technique can be adapted to encrypt either the Fraunhofer or the Fresnel diffraction pattern of the input. Electronic decryption can be performed with a one-step fast Fourier transform reconstruction procedure. Experimental results for both systems including a lensless setup are shown.

© 2000 Optical Society of America

OCIS Codes
(070.0070) Fourier optics and signal processing : Fourier optics and signal processing
(100.0100) Image processing : Image processing
(120.3180) Instrumentation, measurement, and metrology : Interferometry

History
Original Manuscript: November 2, 1999
Revised Manuscript: February 2, 2000
Published: May 10, 2000

Citation
Enrique Tajahuerce, Osamu Matoba, Steven C. Verrall, and Bahram Javidi, "Optoelectronic information encryption with phase-shifting interferometry," Appl. Opt. 39, 2313-2320 (2000)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-39-14-2313

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