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A Novel Method for Determining the Cell Thickness and Twist Angle of a Twisted Nematic Cell by Stokes Parameter Measurement

1997; Institute of Physics; Volume: 36; Issue: 5R Linguagem: Inglês

10.1143/jjap.36.2760

1347-4065

Ying Zhou, Zhan He, Susumu Sato,

Photonic Crystals and Applications

A novel method of determining the cell thickness and the twist angle of twisted nematic liquid crystal (TNLC) cells by measurement of the Stokes parameters of light transmitted through the cell is presented. The relationships of the Stokes parameters of transmission light to the cell thickness and the twist angle are reduced by use of Jones matrix representation. The cell thicknesses and twist angles of some TNLC cells are determined practically by this simple method. The experimental results indicate that this method is valid. Furthermore, some properties of this method are discussed and an accuracy analysis by theoretical calculation is undertaken.