標題: Achieving high focusing power for a large-aperture liquid crystal lens with novel hole-and-ring electrodes
作者: Chiu, Chi-Wei
Lin, Yu-Cheng
Chao, Paul C. -P.
Fuh, Andy Y. -G.
電控工程研究所
Institute of Electrical and Control Engineering
公開日期: 10-十一月-2008
摘要: Aiming to equip commercial camera modules, such as the optical imaging systems with a CMOS sensor module in 3 Mega pixels, an ultra thin liquid crystal lens with designed hole-and-ring electrodes is proposed in this study to achieve high focusing power. The LC lens with proposed electrodes improves the central intensity of electric field which leads to better focusing quality. The overall thickness of the LC lens can be as thin as 1.2 mm and the shortest focal length of the 4 mm-aperture lens occurs at 20 cm under an applied voltage of 30 V at 1 KHz. The inner ring electrode requires only 40% of applied voltage of the external hole electrode. The applied voltages for this internal ring and external hole electrodes can simply be realized by a pre-designed parallel resistance pair and a single voltage source. Experiments are conducted for validation and it shows that the designed LC lens owns good image clearness and contrast at the focal plane. The proposed design reduces the thickness of LC lens and is capable of achieving relative higher focusing power than past studies with lower applied voltage. (C) 2008 Optical Society of America
URI: http://dx.doi.org/10.1364/OE.16.019277
http://hdl.handle.net/11536/8153
ISSN: 1094-4087
DOI: 10.1364/OE.16.019277
期刊: OPTICS EXPRESS
Volume: 16
Issue: 23
起始頁: 19277
結束頁: 19284
顯示於類別:期刊論文


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