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Proceedings Paper

Full-field TN-LCSLM phase modulation characterization using digital holography
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Paper Abstract

A simple, full-field method to characterize phase modulation property of translucent twisted nematic spatial light modulator (TN-LCSLM) is presented using Digital Holography (DH). Generally, amplitude and phase modulation is coupled due to simultaneous distortion in twist alignment and tilt order with applied field. The change in birefringence of liquid crystal material with respect to input grey scale produces phase modulation of wavefront transmitted through TNLCSLM. Most existing techniques for phase modulation characterization of LCSLM are complex requiring lengthy calculations and measure a very small region of total active region of SLM. In this paper, a transmission Digital Holographic system is used to extract phase information from the digitally recorded and numerically reconstructed wavefront. The advantage of phase modulation characterization using DH is that the phase value from larger area inside the active region of TN-LCSLM can be visualized and quantified in real time.

Paper Details

Date Published: 17 August 2010
PDF: 7 pages
Proc. SPIE 7775, Liquid Crystals XIV, 777519 (17 August 2010); doi: 10.1117/12.860269
Show Author Affiliations
Kapil Dev, Nanyang Technological Univ. (Singapore)
Vijay Raj Singh, Nanyang Technological Univ. (Singapore)
Anand Asundi, Nanyang Technological Univ. (Singapore)

Published in SPIE Proceedings Vol. 7775:
Liquid Crystals XIV
Iam Choon Khoo, Editor(s)

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