电润湿液体透镜暂态过程的测试与分析  

Measurement and Analysis of Transient Process of Electrowetting Liquid Lens

作　　者：徐荣青[1] 李雷[1] 孔梅梅[1] 张宏超[2] Xu Rongqing;Li Lei;Kong Meimei;Zhang Hongchao(School of Electronic and Optical Engineering,Nanjing University of Posts and Telecommunications,Nanjing 210023,Jiangsu,China;Faculty of Science,Nanjing University of Science and Technology,Nanjing 210094,Jiangsu,China)

机构地区：[1]南京邮电大学电子与光学工程学院,江苏南京210023 [2]南京理工大学理学院,江苏南京210094

出　　处：《光学学报》2023年第10期214-221,共8页Acta Optica Sinica

基　　金：国家自然科学基金青年科学基金(61905117)。

摘　　要：提出在电压驱动下液体透镜的响应包括固有响应和强制响应,固有响应信号的函数形式由液体透镜的各种参数决定,与驱动电压无关,但其系数与驱动电压有关,强制响应与驱动电压具有相同的函数形式,液体透镜暂态过程的变化规律取决于固有响应,同样与驱动电压无关。因此,对同一液体透镜改变驱动电压仅改变暂态过程的响应幅度,不改变暂态过程的变化规律,从而也不改变液体透镜的响应时间。实验验证了液体透镜的响应可分解为固有响应和强制响应,测量了不同电压驱动下液体透镜的响应过程及响应时间,并对测试结果进行了理论分析。另外,观察到电润湿液体透镜的反冲现象,该现象出现在加载电压和撤去电压的初始阶段。Objective The focal length of the variable-focus optical system can be quickly changed within a certain range,so as to realize the clear imaging of the same objects at different positions or levels,and its function is beyond that of the fixed-focus system.The traditional variable-focus system has a mechanical movement,which restricts its application range.In order to realize zoom without mechanical movement,the variable-focus lens is the key,and an electrowetting liquid lens is an electrically controlled variable-focus lens with excellent performance.At present,many researchers both in China and abroad have conducted a lot of in-depth research on the mechanism,performance,and application of electrowetting liquid lenses.However,due to the diversity of specific lenses and the complexity of the problems,the theory of electrowetting needs to be perfected,the performance needs to be improved,and new applications need to be developed.In terms of application,the performance of the liquid lens is the key.The two most important performance indexes of the variable-focus lens are the focal length and zoom time after zooming,which depend on the response characteristics of the electrowetting liquid lens.From the transient state to the steady state,the focal length after zooming is determined by the steady-state value,and the response time is determined by the transient process.Whether in theory or the experiment,the research on steady-state responses is much less difficult than that on the transient process,so the current research on the response characteristics of electrowetting liquid lenses mainly focuses on the steady-state response,while the research on the transient process is rarely reported.As a result,there is not a completely clear and unified understanding of the transient process.In this paper,the transient process of electrowetting liquid lenses is measured and analyzed,which is helpful to perfect and enrich the electrowetting theory and expand new applications.Methods A measurement system of the zoom process of

关 键 词：光学器件 主动或自适应光学 液体透镜 暂态过程 反冲现象 

分 类 号：O436[机械工程—光学工程]