An electrically tunable-focusing liquid crystal lens with a low voltage and simple electrodes | Zendy

Hung-Chun Lin | Zendy; YiHsin Lin | Zendy

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An electrically tunable-focusing liquid crystal lens with a low voltage and simple electrodes

Author(s) -

Hung-Chun Lin,

YiHsin Lin

Publication year - 2012

Publication title -

optics express

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.394

H-Index - 271

ISSN - 1094-4087

DOI - 10.1364/oe.20.002045

Subject(s) - materials science , lens (geology) , electrode , liquid crystal , optics , voltage , planar , electric field , dielectric , optoelectronics , low voltage , layer (electronics) , permittivity , electrical engineering , nanotechnology , physics , computer graphics (images) , quantum mechanics , computer science , engineering

An electrically tunable focusing LC lens with a low voltage and simple planar electrodes is demonstrated. The inhomogeneous electric field of the LC lens without any hole-patterned-electrode is generated by using an embedded polymeric layer with a gradient distribution of dielectric constants (or relative permittivity). LC directors in the LC layer experience spatially inhomogeneous voltages even though a single voltage is applied to the planar electrodes. Such a LC lens has a low voltage (~2.6 V(rms)) and simple design of electrodes. The gradient distribution of dielectric constants of polymeric layer is discussed and the performance of the LC lens is investigated. The applications of such a LC lens are cell phones, webcam, and pico projectors.

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