Variable focus dielectric liquid droplet lens
Variable focus dielectric liquid droplet lens
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DOI：
10.1364/oe.14.004101
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发表时间：
2006-05-01
期刊：
影响因子：
3.8
通讯作者：
Yeh, JA
中科院分区：
文献类型：
--
作者：
Cheng, CC;Chang, CA;Yeh, JA
介绍了一种由介电泳力驱动的液晶液滴透镜。在非均匀交流电场作用下，液滴透镜受到DEP力的作用而发生变形。对焦距、磁滞和电极设计进行了研究。当电极间距为50微米时，焦距在0~200V范围内变化1.6~2.6 mm，最大调谐率约为60%。接触角滞后小于3，在静止状态下1min后基本消失。当电极间距大于200微米时，焦距调谐比降至5%以下。数值孔径约为0.5的液晶液滴透镜的功耗约为0.1 mW。测得其响应时间约为220ms。(C)2006年美国光学学会
A liquid crystal droplet lens driven by the dielectrophoresis (DEP) force was demonstrated. The liquid crystal droplet lens was deformed by the DEP forces under non-uniform AC electric fields. Focal length, hysteresis and electrode design were studied. The focal length varied from 1.6mm to 2.6mm in the range of 0-200V at 1 kHz for electrode spacing of 50 mu m; that is, the tuning ratio of the focal length was about 60% in maximum. The hysteresis of contact angle was found to be less than 3 and it vanished after 1 minute at the rest state. As the electrode spacing over 200 mu m, the tuning ratios of the focal length dropped below 5%. The liquid crystal droplet lens that had numerical aperture of about 0.5 consumed power of about 0.1mW. Its response time was measured to be about 220ms. (c) 2006 Optical Society of America