Physical and Technical Aspects of Measurements of Ordinary and Extraordinary Refraction Indices and Birefringence of Nematic Liquid Crystals
J. KÄ™dzierskia, M.A. Kojdeckib, K. Kowiorskic, Z. Raszewskia, E. Miszczykd
aInstitute of Applied Physics, Military University of Technology, Warsaw, Poland
bInstitute of Mathematics and Cryptology, Military University of Technology, Warsaw, Poland
cInstitute of Electronic Materials Technology, Department of Chemical Technologies, Warsaw, Poland
dInstitute of Physics, University of Technology and Humanities, Radom, Poland
Received: April 1, 2019; revised version April 23, 2019; in final form April 27, 2019
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This article is a survey of techniques for experimental determination of ordinary and extraordinary refractive indices and birefringence of uniaxial liquid crystals. The ideas of methods are briefly described with basic references added.

topics: liquid crystals, refractive indices of liquid crystals, wedge cell, birefringence, interference, measurements of refractive indices