New imaging polariscope for the full-field measurement of twisted-nematic liquid-crystal thickness

Tsung Chih Yu, Yu-Lung Lo

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

This study proposes a phase-sensitive imaging polariscope for the mapping of spatially-distributed cell gap of a twisted-nematic liquid crystal (TNLC) with a heterodyne configuration. The polariscope adopts an electric-optic (EO) modulator incorporated with two quarter wave plates to modulate the linear polarized light. By applying an integrating-bucket method, the two-dimensional (2-D) phase distribution of the detected heterodyne signal is extracted for the inverse calculation of the liquid crystal (LC) cell thickness. The experimental results confirm the effectiveness of the proposed method.

Original languageEnglish
Title of host publicationProceedings of the SEM Annual Conference and Exposition on Experimental and Applied Mechanics 2007
Pages713-719
Number of pages7
Publication statusPublished - 2007 Nov 19
EventSEM Annual Conference and Exposition on Experimental and Applied Mechanics 2007 - Springfield, MA, United States
Duration: 2007 Jun 32007 Jun 6

Publication series

NameProceedings of the SEM Annual Conference and Exposition on Experimental and Applied Mechanics 2007
Volume2

Other

OtherSEM Annual Conference and Exposition on Experimental and Applied Mechanics 2007
CountryUnited States
CitySpringfield, MA
Period07-06-0307-06-06

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All Science Journal Classification (ASJC) codes

  • Mechanical Engineering

Cite this

Yu, T. C., & Lo, Y-L. (2007). New imaging polariscope for the full-field measurement of twisted-nematic liquid-crystal thickness. In Proceedings of the SEM Annual Conference and Exposition on Experimental and Applied Mechanics 2007 (pp. 713-719). (Proceedings of the SEM Annual Conference and Exposition on Experimental and Applied Mechanics 2007; Vol. 2).