7 April 2000 Practical implementation of phase-only optical encryption system
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Proceedings Volume 3973, Optical Security and Counterfeit Deterrence Techniques III; (2000); doi: 10.1117/12.382199
Event: Electronic Imaging, 2000, San Jose, CA, United States
Abstract
In this paper, we present a system for the practical implementation of phase-only optical encryption. Our approach is based on the use of the generalized phase contrast technique for the readout of decrypted information contained within the phase component of an optical wavefront. The decryption is achieved by superimposing a decrypting phase key and an encrypted phase mask in the image plane of an optical system and then applying the generalized phase contrast technique to generate an intensity pattern corresponding to the original encoded information. We have constructed an experiment system in which an encrypted binary phase mask is decrypted by a binary phase key that is implemented electronically on a phase-only spatial light modulator allowing a simplified electronic alignment of the key by scrolling its position with respect to the mask.
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Paul C. Mogensen, Jesper Glueckstad, "Practical implementation of phase-only optical encryption system", Proc. SPIE 3973, Optical Security and Counterfeit Deterrence Techniques III, (7 April 2000); doi: 10.1117/12.382199; https://doi.org/10.1117/12.382199
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KEYWORDS
Phase contrast

Binary data

Spatial light modulators

Wavefronts

Phase shifts

Phase shift keying

Visualization

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