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In the cell thick measuring method which measures the cell thickness cell thick measuring method, making use
In the cell thick measuring method which measures the cell thickness cell thick measuring method, making use
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机译:在测量细胞厚度的细胞厚度测量方法中,利用
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摘要
PROBLEM TO BE SOLVED: To highly accurately measure a cell thickness of a liquid crystal cell including a twisted orientation liquid crystal by making it possible to apply the Senarmont principle to the measurement. ;SOLUTION: A light projected from a laser oscillator 11 is taken out as a linearly polarized light L0 with the use of a polarizing plate 4. The linearly polarized light is shed onto a liquid crystal cell 3 to be measured which includes a TN(twisted nematic) liquid crystal of a twist angle of 90°. The light projected from the liquid crystal cell is input to a 1/4 wave length plate 6, and an azimuth angle θ of a polarization axis L1 of the light out of the 1/4 wave length plate is detected. An apparent retardation R' is calculated from the azimuth angle θ. A true retardation R is converted from the apparent retardation R'. A thickness (d) of the cell is calculated from the true retardation (R=Δn.d: Δn is a difference of indices of refraction in a horizontal direction and a vertical direction of the liquid crystal).;COPYRIGHT: (C)1998,JPO
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