Characterization of the anamorphic and frequency dependent phenomenon in Liquid Crystal on Silicon displays

L. Lobato; A. Lizana; A. M´arquez; I. Moreno; C. Iemmi; J. Campos; M. J. Yzuel

doi:10.2971/jeos.2011.11012s

Journal of the European Optical Society - Rapid publications, Vol 6 (2011)

Characterization of the anamorphic and frequency dependent phenomenon in Liquid Crystal on Silicon displays

L. Lobato, A. Lizana, A. M´arquez, I. Moreno, C. Iemmi, J. Campos, M. J. Yzuel

Abstract

The diffractive efficiency of Liquid Crystal on Silicon (LCoS) displays can be greatly diminished by the appearance of temporal phase fluctuations in the reflected beam, depolarization effects and also because of phase modulation depths smaller than 2π. In order to maximize the efficiency of the Diffractive Optical Elements (DOEs) implemented in the LCoS device, the Minimum Euclidean Distance principle can be applied. However, not all the diffractive elements can be corrected in the same way due to the anamorphic and frequency dependent phenomenon, which is related to the LCoS response, largely dependending on the period and the spatial orientation of the generated DOE. Experimental evidence for the anamorphic and frequency dependent phenomenon is provided in this paper, as well as a comparative study between the efficiency obtained for binary gratings of different periods

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