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The optical anisotropy of rubbed PI(polyimide) film on patterned LCD glass substrate is analyzed using polarimetry. The direction of the optic axis and the magnitude of the very small retardation (~ 0.4 nm or less) is precisely measured by using a transmission ellipsometer. The variation of the optical anisotropy is presented as the curve of the optic axis versus the magnitude of the phase retardation and it is explained by using a simple optical model.Keywords: Optical anisotropy, Patterned LCD glass, Rubbing direction, Rubbed PI, PolarimetryOCIS codes: (160.4760) Optical properties; (240.0240) Optics at surfaces; (230.3720) Liquid-crystal devices; (260.2130) Ellipsometry and polarimetry

Precise Measurement of Optical Anisotropy of Rubbed Polyimide on Patterned Glass and its Nanoscale Variation