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Influences on system error and relative standard deviation in the measurement of liquid crystal empty cell gap are analyzed in great detail. Great differences exist in system error and standard deviation among measuring methods. Momentum Scanning Interferometry (MSI) using the P wave can keep system error at a small level. ITO and PI layers are the main sources of system error, but their influence...
The first resonant guided mode of P->P reflection in Half-leaky Guided Mode (HLGM) technique is very sensitive to the tilt angle of uniaxial liquid crystals. A formula is presented to describe the relationship between the tilt angle and the incident angle of the first resonant valley point of P->P reflectivity, R pp . This method is suitable to measure tilt angle of any degree,...
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