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Optical Engineering

Systematic errors of an optical encryption system due to the discrete values of a spatial light modulator
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Paper Abstract

An optical implementation of the amplitude encoded double random phase encryption/decryption technique is implemented, and both numerical and experimental results are presented. In particular, we examine the effect of quantization in the decryption process due to the discrete values and quantized levels, which a spatial light modulator (SLM) can physically display. To do this, we characterize a transmissive SLM using Jones matrices and then map a complex image to the physically achievable levels of the SLM using the pseudorandom encoding technique. We present both numerical and experimental results that quantify the performance of the system.

Paper Details

Date Published: 1 February 2009
PDF: 7 pages
Opt. Eng. 48(2) 027001 doi: 10.1117/1.3076208
Published in: Optical Engineering Volume 48, Issue 2
Show Author Affiliations
David Samuel Monaghan, Univ. College Dublin (Ireland)
Unnikrishnan Gopinathan, Univ. Stuttgart (Germany)
Damien P. Kelly, National Univ. of Ireland, Maynooth (Ireland)
Thomas J. Naughton, National Univ. of Ireland, Maynooth (Ireland)
John T. Sheridan, Univ. College Dublin (Ireland)

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