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Proceedings Paper

Review of operating modes for twisted nematic liquid crystal displays for applications in optical image processing
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Paper Abstract

In this work we review the application of twisted nematic liquid crystal displays (TN-LCD's) for image processing, pattern recognition and diffractive optical elements. For these applications, three kinds of spatial modulations are of interest: phase-only, amplitude-only and combined full amplitude and phase modulation. However TN-LCD's generally provide coupled phase and amplitude modulation. We review how to achieve these three desired operating conditions. We begin with a discussion of different Jones matrix models for TN-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 by spatially modulating the maximum phase depth.

Paper Details

Date Published: 10 November 2003
PDF: 12 pages
Proc. SPIE 5181, Wave Optics and Photonic Devices for Optical Information Processing II, (10 November 2003); doi: 10.1117/12.510257
Show Author Affiliations
Jeffrey A. Davis, San Diego State Univ. (United States)
Maria J. Yzuel, Univ. Autonoma de Barcelona (Spain)
Juan Campos, Univ. Autonoma de Barcelona (Spain)
Ignacio Moreno, Univ. Miguel Hernandez (Spain)
Andres Marquez, Univ. de Alicante (Spain)
Josep Nicolas, Univ. Autonoma de Barcelona (Spain)


Published in SPIE Proceedings Vol. 5181:
Wave Optics and Photonic Devices for Optical Information Processing II
Pierre Ambs; Fred R. Beyette, Editor(s)

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