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

Discontinued Devices LC 2002 Spatial Light Modulators
Imaging/ Image Processing Misc.: Speckle / Characterization / Metrology
Published on:
Authors: David S. Monaghan, Unnikrishnan Gopinathan, Damien P. Kelly, Thomas J. Naughton, John T. Sheridan
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. “

Restricted Access

Publication: SPIE – Optical Engineering
Issue/Year: Opt. Eng., Vol. 48, 027001 (2009);
DOI: 10.1117/1.3076208
Link: https://doi.org/10.1117/1.3076208

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