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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 16, Iss. 21 — Oct. 13, 2008
  • pp: 17131–17137

Controlling pre-tilt angles of liquid crystal using mixed polyimide alignment layer

Wei-Yen Wu, Chen-Chen Wang, and Andy Ying-Guey Fuh  »View Author Affiliations

Optics Express, Vol. 16, Issue 21, pp. 17131-17137 (2008)

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Three approaches to controlling liquid crystal (LC) pre-tilt angle in a cell are demonstrated using a polyimide (PI) alignment layer on substrates, in the form of a mixture of horizontal (H) and vertical (V) polyimides. The concentration ratio of H- to V-PI, baking temperature, and rubbing strength influence the pre-tilt angle, and highlight parameters for controlling the pre-tilt angle of an LC cell. Finally, a variable polarization converter is demonstrated using this approach.

© 2008 Optical Society of America

OCIS Codes
(120.4570) Instrumentation, measurement, and metrology : Optical design of instruments
(160.3710) Materials : Liquid crystals
(220.1140) Optical design and fabrication : Alignment

ToC Category:
Optical Devices

Original Manuscript: July 21, 2008
Revised Manuscript: September 15, 2008
Manuscript Accepted: October 7, 2008
Published: October 10, 2008

Wei-Yen Wu, Chen-Chen Wang, and Andy Y. Fuh, "Controlling pre-tilt angles of liquid crystal using mixed polyimide alignment layer," Opt. Express 16, 17131-17137 (2008)

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