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

Hung Chun Lin*, Yi-Hsin Lin

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

71 Scopus citations

Abstract

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 Vrms) 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.

Original languageEnglish
Pages (from-to)2045-2052
Number of pages8
JournalOptics Express
Volume20
Issue number3
DOIs
StatePublished - 30 Jan 2012

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