Title: A New Negative Liquid Crystal Lens With Multiple Ring Electrodes in Unequal Widths
Authors: Chao, P. C. -P.
Kao, Y. -Y.
Hsu, C. -J.
電機工程學系
Department of Electrical and Computer Engineering
Keywords: Divergent (negative) lens;liquid crystal (LC) lens;electrodes in unequal widths
Issue Date: 1-Feb-2012
Abstract: This study is dedicated to the design of a new negative liquid crystal (LC) lens with multiple ring electrodes in unequal widths. The number and widths of the multiple ring electrodes are designed to offer online tunability on focusing length by predetermined individual electrode voltages. This aims to render a smooth refraction index distribution that mimics well a divergent lens based on the theory of a gradient refraction index (GRIN) lens. Finally, the proposed negative LC lens is fabricated with the capability of realizing different focus lengths in a relatively large aperture of 5 mm and a thickness of 0.7 mm. Experiments are conducted to verify expected light-diverging performance. The effective focus length (EFL) is measured based on interference patterns. It is shown that the proposed negative LC lens is able to realize light-divergent effects with an EFL as short as -357.9 mm.
URI: http://dx.doi.org/10.1109/JPHOT.2012.2183583
http://hdl.handle.net/11536/15672
ISSN: 1943-0655
DOI: 10.1109/JPHOT.2012.2183583
Journal: IEEE PHOTONICS JOURNAL
Volume: 4
Issue: 1
Begin Page: 250
End Page: 266
Appears in Collections:Articles


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