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Optical Engineering

Holographic encryption system in the Fresnel domain with convergent random illumination
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Paper Abstract

A secure holographic system is proposed, based on the principle of two-wave encryption in the Fresnel domain under convergent random illumination. The convergent random wavefront, instead of the commonly used plane wavefront, improves the security of a holographic encryption system, providing better protection from unauthorized users. Our system has two new encryption parameters (the convergence distance and randomized lens phase function) in addition to the propagation distance and random phase masks in the reference arm. Validity and feasibility of the proposed method are verified with numerical simulation and experimental results.

Paper Details

Date Published: 1 September 2010
PDF: 6 pages
Opt. Eng. 49(9) 095803 doi: 10.1117/1.3488043
Published in: Optical Engineering Volume 49, Issue 9
Show Author Affiliations
Pramod Kumar, Indian Institute of Technology Delhi (India)
Joby Joseph, Indian Institute of Technology Delhi (India)
Kehar Singh, Indian Institute of Technology Delhi (India)

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