Operation of liquid-crystal displays for optical computing

J. A. Davis; I. Moreno; M. J. Yzuel; J. Campos; A. Marquez; J. Nicolas

doi:10.1117/12.617650

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15 September 2005 Operation of liquid-crystal displays for optical computing

J. A. Davis, I. Moreno, M. J. Yzuel, J. Campos, A. Marquez, J. Nicolas

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Proceedings Volume 5907, Photonic Devices and Algorithms for Computing VII; 590701 (2005) https://doi.org/10.1117/12.617650
Event: Optics and Photonics 2005, 2005, San Diego, California, United States

Abstract

We review the operation of both twisted and parallel-aligned nematic liquid-crystal displays (LCD's) for applications in optical computing, image processing, pattern recognition and diffractive optical elements. For these applications, three spatial modulation characteristics are of interest: phase-only, amplitude-only, and combined full amplitude and phase. We review how to achieve these three operating conditions. We begin with a discussion of the Jones matrix model for the twisted-nematic LCD displays. We examine optical configurations for achieving amplitude-only modulation and polarization eigenvectors for achieving phase-only modulation. Then we review an extremely successful technique for obtaining combined full amplitude and phase modulation with a single LCD by spatially modulating the maximum phase depth. Finally we discuss new advances in achieving 2D polarization modulation.

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J. A. Davis, I. Moreno, M. J. Yzuel, J. Campos, A. Marquez, and J. Nicolas "Operation of liquid-crystal displays for optical computing", Proc. SPIE 5907, Photonic Devices and Algorithms for Computing VII, 590701 (15 September 2005); https://doi.org/10.1117/12.617650

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