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长春光学精密机械与物... [1]
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会议论文 [1]
发表日期
2007 [1]
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The cell thickness and twist angle measurement of twist nematic liquid crystal cell by rotation of a quarter-wave plate using fourier analysis method (EI CONFERENCE)
会议论文
Asia Display 2007, AD'07, March 12, 2007 - March 16, 2007, Shanghai, China
Cui H.-Q.
;
Ling Z.-H.
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提交时间:2013/03/25
Proposed a new method of determining the cell thickness and the twist angle of twisted nematic liquid crystal cells
a quarter-wave plate was inserted between the liquid crystal cell and the analyzer
a stepper motor rotated the Retarder by 360
and measured the light intensity of every modulated point
solved the stokes parameters of polarization light exiting from the liquid crystal cell using Fourier analysis method
thereby determining the cell thickness and the twist angle. Experiments indicated that it is suitable for measuring the low-cell-gap accurately. In addition
it also can be applied to the measurement of the cell thickness and twist angle of single polarizer reflected liquid crystal cell.
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