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

David Samuel Monaghan; Unnikrishnan Gopinathan; Damien P. Kelly; Thomas J. Naughton; John T. Sheridan

doi:10.1117/1.3076208

1 February 2009 Systematic errors of an optical encryption system due to the discrete values of a spatial light modulator

David Samuel Monaghan, Unnikrishnan Gopinathan, Damien P. Kelly, Thomas J. Naughton, John T. Sheridan

Author Affiliations +

Optical Engineering, Vol. 48, Issue 2, 027001 (February 2009). https://doi.org/10.1117/1.3076208

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.

©(2009) Society of Photo-Optical Instrumentation Engineers (SPIE)

Citation Download Citation

David Samuel Monaghan, Unnikrishnan Gopinathan, Damien P. Kelly, Thomas J. Naughton, and John T. Sheridan "Systematic errors of an optical encryption system due to the discrete values of a spatial light modulator," Optical Engineering 48(2), 027001 (1 February 2009). https://doi.org/10.1117/1.3076208

Published: 1 February 2009

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