Title: Ultraviolet-light-treated polyimide alignment layers for polarization-independent liquid crystal Fresnel lenses
Authors: Hwang, S. -J.
Chen, T. -A.
Lin, K. -R.
Jeng, S. -C.
影像與生醫光電研究所
Institute of Imaging and Biomedical Photonics
Issue Date: 1-Apr-2012
Abstract: The surface energy of a conventional homeotropic polyimide (PI) alignment layer was altered via ultraviolet (UV) light irradiation, and the pretilt angle of the PI was changed along with the surface energy. The surface energy can be controlled by either UV exposure time or irradiation intensity. A switchable liquid crystal Fresnel lens (LCFL) was created by the UV-treated alignment layers to form a Fresnel zone-distribution hybrid alignment, vertically aligned and hybrid aligned LC in the odd and even zones, respectively. The LCFL was made polarization-independent by circular buffing, and it had a diffraction efficiency of similar to 22% at a low driving voltage of similar to 1.2 V.
URI: http://hdl.handle.net/11536/16052
ISSN: 0946-2171
Journal: APPLIED PHYSICS B-LASERS AND OPTICS
Volume: 107
Issue: 1
End Page: 151
Appears in Collections:Articles


Files in This Item:

  1. 000303375700022.pdf

If it is a zip file, please download the file and unzip it, then open index.html in a browser to view the full text content.