Volume Photo-Aligned Retarders

Hubert SEIBERLE  Thomas BACHELS  Carsten BENECKE  Mohammed IBN-ELHAJ  

IEICE TRANSACTIONS on Electronics   Vol.E90-C   No.11   pp.2088-2093
Publication Date: 2007/11/01
Online ISSN: 1745-1353
Print ISSN: 0916-8516
Type of Manuscript: INVITED PAPER (Special Section on Electronic Displays)
LPP,  LCP,  photo-alignment,  volume photo-alignment,  optical retarder,  

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Coated retarders based on liquid crystal materials are typically aligned by brushing or photo-alignment. Recently, we have managed to combine the aligning and retarder function into a single material. Alignment of the new volume photo-alignable retarder (VPR-) material is induced in the bulk upon exposure to linearly polarized light. The new alignment mechanism opens up a new dimension for the design of optical retarders, especially when combined with conventional surface alignment, which allows to induce complex tilt and twist profiles.