In order to determine 2-dimensional (2D) cell thickness and twist angle distributions in twisted nematic (TN) liquid crystal (LC) devices, we propose a 2D Stokes parameter method (2DSPM). A 2DSPM system is set up using a polarizing microscope, in which some preliminary experiments are conducted to demonstrate the validity of this 2DSPM. Experimental results of 2D distributions of cell thickness and twist angle in TN LC sample cells are given for the first time. The measurement accuracy of the 2DSPM system is analyzed.
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He et al. (1998) studied this question.
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