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Applied Optics

Applied Optics


  • Editor: Joseph N. Mait
  • Vol. 50, Iss. 27 — Sep. 20, 2011
  • pp: 5299–5302

Evaluation of Kerr constant of blue-phase liquid crystals by measuring off-axis retardation in vertical electric field cells

Pao-Ju Hsieh and Huang-Ming Philip Chen  »View Author Affiliations

Applied Optics, Vol. 50, Issue 27, pp. 5299-5302 (2011)

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Because of the nonuniform electric field of the in-plane-switching cell in the thickness direction, an accurate and efficient way for evaluating the Kerr constant of blue-phase liquid crystal (BPLC) needs to be developed. This study demonstrates a method for evaluating the Kerr constant by measuring the off-axis-induced retardation ( R th ) change in normal vertical field cells using a commercial polarimeter. The angle-dependent behavior of the R th change is observed as an electric-tunable positive C retarder. In this paper, a sigmoid fitting model has been chosen for calculating the Kerr constant for considering the very small intrinsic birefringence of the BPLC.

© 2011 Optical Society of America

OCIS Codes
(120.2130) Instrumentation, measurement, and metrology : Ellipsometry and polarimetry
(120.5050) Instrumentation, measurement, and metrology : Phase measurement
(160.1190) Materials : Anisotropic optical materials
(160.2100) Materials : Electro-optical materials
(160.3710) Materials : Liquid crystals
(350.4800) Other areas of optics : Optical standards and testing

ToC Category:

Original Manuscript: February 2, 2011
Revised Manuscript: July 8, 2011
Manuscript Accepted: July 11, 2011
Published: September 15, 2011

Pao-Ju Hsieh and Huang-Ming Philip Chen, "Evaluation of Kerr constant of blue-phase liquid crystals by measuring off-axis retardation in vertical electric field cells," Appl. Opt. 50, 5299-5302 (2011)

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