Journal
OPTICS EXPRESS
Volume 20, Issue 3, Pages 2045-2052Publisher
OPTICAL SOC AMER
DOI: 10.1364/OE.20.002045
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- National Science Council (NSC) in Taiwan [98-2112-M-009-017-MY3]
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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 (similar to 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. (C)2012 Optical Society of America
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