激光与光电子学进展, 2012, 49 (4): 041201, 网络出版: 2012-01-05
50 Hz交流电控制的可变焦液体透镜
Variable-Focus Liquid Lens Controlled by 50 Hz AC Electric Field
测量 液体变焦透镜 交流电 低频 瞬时最大值 measurement variable-focus liquid lens AC low frequency instantaneous maximum
摘要
研究了采用“金属导电基底/Parylene 介电层/Teflon疏水层”透镜内芯材料的介电上电润湿(EWOD)特性。实验获得了导电液滴分别在直流电(DC)和50 Hz交流电(AC)控制下的接触角随电压变化的曲线。实验结果表明,为达到DC电源控制下的液滴的EWOD相同效果,使用低频的AC电压应考虑其瞬时最大值而不是有效值(均方根值)。目前已经制作出基于50 Hz交流电控制的可变焦液体透镜并进行加电压变焦实验。给出了该液体透镜的焦距与电压之间的变化曲线,实验结果与上述分析一致。
Abstract
The property of electrowetting on dielectric (EWOD) on the core-surface of variable-focus liquid lens with specific “conductive metal/insulation film/hydrophobic” material is one of the important research topics in optofluidics. Contact angle versus applied voltage (DC and AC) curve of conductive liquid droplets is obtained by experiment. Experimental results show that, to achieve the same effect as that obtained with DC power, what should be considered is the instantaneous maximum rather than the effective value (root-mean-square) when using low-frequency AC voltage. The variable-focus experiment of the variable-focus lens under the applied 50 Hz AC voltage is performed. A curve between the focal length of the variable-focus lens and the applied voltage is given. The experiment result agrees very well with the above analysis.
陈陶, 梁忠诚, 徐荣青. 50 Hz交流电控制的可变焦液体透镜[J]. 激光与光电子学进展, 2012, 49(4): 041201. Chen Tao, Liang Zhongcheng, Xu Rongqing. Variable-Focus Liquid Lens Controlled by 50 Hz AC Electric Field[J]. Laser & Optoelectronics Progress, 2012, 49(4): 041201.