Utilization of elliptically polarized light for phase-only modulation by twisted nematic liquid crystal spatial light modulators

Makoto Yamauchi

doi:10.1117/12.429449

4 June 2001 Utilization of elliptically polarized light for phase-only modulation by twisted nematic liquid crystal spatial light modulators

Makoto Yamauchi

Author Affiliations +

Proceedings Volume 4296, Practical Holography XV and Holographic Materials VII; (2001) https://doi.org/10.1117/12.429449
Event: Photonics West 2001 - Electronic Imaging, 2001, San Jose, CA, United States

Abstract

Liquid crystal spatial light modulators (LCSLMs) are promising devices for real-time holography. We are trying to use a twisted nematic LCSLM as a phase hologram. In previous years, only linearly polarized light has been applied to use the device as a phase-only modulator. Recently, eigenstates of the device were studied using Jones matrix calculus. The eigenvectors of the device represents elliptically polarized light, and the negative eigenvector indicates the preferable performance for phase-only modulation. In this paper, we generalize the calculus by introducing a polar coordinate system and angular parameters. This simplifies the analysis of device characteristics and makes it easier. It also enables us to discuss more precisely the intensity transmission and phase delay caused by the device. Finally, we present the optimum eigenvector for phase modulation in terms of the birefringence range of the LCSLM.

Citation Download Citation

Makoto Yamauchi "Utilization of elliptically polarized light for phase-only modulation by twisted nematic liquid crystal spatial light modulators", Proc. SPIE 4296, Practical Holography XV and Holographic Materials VII, (4 June 2001); https://doi.org/10.1117/12.429449

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KEYWORDS

Phase shift keying

Modulation

Birefringence

Liquid crystals

Holography

Modulators

Polarizers

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