Pretilt Angle Measurements of TNLC Cells by Using Two Wavelengths Storks Parameter Method

Abstract

We develop a new Stokes Parameter Method for determining a pretilt angle by measuring Stokes parameters of twisted nematic (TN) liquid crystal cell (LC) at two wavelengths. In addition, a cell thickness and twist angle of the TNLC cell can also be measured simultaneously. First we discuss a validity of this new SPM as compared with a previous SPM by a theoretical calculation. Second the experimental results for the TNLC cell which is fabricated with two different rubbed alignment layers are given, and the results verify its validity.