Articles & Issues

Language: English

Conflict of Interest: In relation to this article, we declare that there is no conflict of interest.

This is an Open-Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/bync/3.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

All issues

BIREFRINGENCE MEASUREMENT ON THE LIQUID CRYSTAL BY PHASE MODULATION TECHNIQUE

YOON KH PARK OO KIM JD

Korean Journal of Chemical Engineering, January 1990, 7(1), 18-21(4), 10.1007/BF02697337

Download PDF

Abstract

A convenient and accurate technique for measuring the birefringence of liquid crystal(LC) is developed. The birefringence of LC was obtained with only one experimental run by using phase modulation technique, which is an expansion of PMFB(Phase Modulated Flow Birefringence)technique developed elsewhere[1]. The basic principle of the method is based on the determination of the phase differences which occur when a phase modulated monochromatic polarized light propagates through a medium with an anisotropic refractive index. Birefringence measurements with red light(wavelength : 0.6328㎛) for commercial liquid crystal material(Merck, ZNL 3201-000) are reported.

Keywords

References

Frattini PL, Ph.D. Thesis, Stanford Univ. (1986)
Chang R, Mater. Res. Bull., 7, 267 (1982)
Chang R, Mol. Cryst. Liq. Cryst., 38, 77 (1977)
Soref RA, Rafuse MJ, J. Appl. Phys., 43, 2029 (1972)
Haase W, Potzsch D, Mol. Cryst. Liq. Cryst., 38, 77 (1977)
Hanson EG, Shen YR, Mol. Cryst. Liq. Cryst., 36, 193 (1976)
Miraldi E, Oldano C, Appl. Opt., 21, 4163 (1982)
Wu ST, Efron U, Appl. Opt., 23, 3911 (1984)
William AS, Polarized Light, Harvard Univ. Press (1972)
Park OO, Hwang CI, Lim TJ, Korean J. Chem. Eng., 6(1), 23 (1989)
de Gennes PG, The Physics of Liquid Crystals, Clarendon, Oxford (1974)