Journal
OPTICS EXPRESS
Volume 16, Issue 21, Pages 17131-17137Publisher
OPTICAL SOC AMER
DOI: 10.1364/OE.16.017131
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- National Science Council (NSC) of the Republic of China (Taiwan) [NSC 95-2112-M-006-022-MY3]
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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. (C) 2008 Optical Society of America
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