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Journal of Display Technology

Journal of Display Technology


  • Vol. 3, Iss. 3 — Sep. 1, 2007
  • pp: 259–265

Determining the Liquid-Crystal Polar Anchoring at High Electric Fields by Heterodyne Interferometer

Shug-June Hwang, Hsin Her Yu, and Min-Hua Hsu

Journal of Display Technology, Vol. 3, Issue 3, pp. 259-265 (2007)

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A common-path heterodyne interferometer is proposed to determine the surface anchoring energy of a homogeneously aligned nematic liquid crystal (LC). This technique measures, with high sensitivity, the phase retardation of a nematic LC cell as a function of the applied voltage. According to the measured voltage-dependent phase retardation of the LC cells, a simple linear fitting over a well-specified voltage window can be achieved, leading to a precise determination of the polar anchoring energy. The anchoring energy Wa, cell gap, and pretilt angle can be simultaneously obtained in the course of the same experiment.

© 2007 IEEE

Shug-June Hwang, Hsin Her Yu, and Min-Hua Hsu, "Determining the Liquid-Crystal Polar Anchoring at High Electric Fields by Heterodyne Interferometer," J. Display Technol. 3, 259-265 (2007)

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