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Browsing by Author "Lin, A"

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    Photoelastic modulation polarimetry and its measurement of twisted nematic liquid crystal
    (2001)
    Chao, YF
    ;
    Lin, A
    ;
    Wang, MW
    ;
    光電工程學系
    ;
    Department of Photonics
    For in situ/real time measurement, a retarder is substituted by a photoelastic modulator (PEM) in a polarimetry. The azimuthal position of the strain axis of PEM is directly determined with respect to the orientation of the transmission axis of polarizer and analyzer. The Mueller matrix of a twisted nematic liquid crystal (TN-LCD) is derived analytically. The phase retardation and the twisted angle of a TN-LCD are numerically obtained through two successive measurements of the Mueller polarimeter.