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Determination of optical parameters of a twisted-nematic liquid crystal by phase-sensitive optical heterodyne interferometric ellipsometry

Authors :
Tsai, Chien-Chung
Chou, Chien
Han, Chien-Yuan
Hsieh, Cheng-Hung
Liao, Kuo-Yu
Chao, Yu-Faye
Source :
Applied Optics. Dec 10, 2005, Vol. 44 Issue 35, p7509, 6 p.
Publication Year :
2005

Abstract

What is believed to be a novel phase-sensitive optical heterodyne interferometric ellipsometer is set up to characterize a twisted-nematic liquid crystal (TN-LC) by the elliptical parameters of the output polarization state. This ellipsometer presents the advantages of both polarized optical heterodyne interferometry and optical photometry, which introduce a polarization modulation that is capable of performing with high-sensitivity on phase detection in real time. The twist angle [phi] and the untwisted phase retardation [GAMMA] of TN-LC are measured precisely. The experimental results verify that a TN-LC can be treated as identical to an elliptical retarder. OCIS codes: 120.2130, 120.3180, 120.5240, 120.5410, 160.3710.

Details

Language :
English
ISSN :
1559128X
Volume :
44
Issue :
35
Database :
Gale General OneFile
Journal :
Applied Optics
Publication Type :
Academic Journal
Accession number :
edsgcl.140446868