Measurement of the pretilt angle and the cell gap of nematic liquid crystal cells by heterodyne interferometry.


This work proposes a simple method, based on the crystal rotation technique and heterodyne interferometry, to simultaneously determine the pretilt angle and cell gap of nematic liquid crystal cells. When heterodyne light passes through a nematic liquid crystal cell, the phase retardation given by the characteristic parameters of the cell can be measured… (More)


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