双液体变焦透镜变焦迟滞现象的研究

Variable-Focus Hysteresis of Double-Liquid Variable-Focus Lens

通过引入接触线摩擦力,建立了基于双液体变焦透镜内壁的液液固三相系统接触线的力学物理模型,重新对非理想状态下液液固三相系统接触线进行了受力分析。在此基础上,对杨氏方程进行了改进,合理地解释了双液体变焦透镜的变焦迟滞现象。通过对疏水介电层厚度为2μm的双液体变焦透镜进行加电压变焦实验,给出了双液体透镜的焦距与电压之间的迟滞曲线,该实验结果与理论分析是一致的。

By introducing the contact-line static friction, a mechanical model for the contact line in a double-liquid variable-focus lens is established, which is a liquid-liquid-solid three phase system. The mechanical analysis on the contact line of the liquid-liquid-solid three phase system with non-ideal state is done again. On this basis, the Young＇s equation is modified, and a reasonable explanation is given for the phenomenon of variable-focus hysteresis. The variable-focus experiment of the double-liquid variable-focus lens with dielectric layer thickness of 2μm under the applied voltages is performed. A hysteresis curve between the focal length of the double-liquid variable-focus lens and the applied voltage is given. The experimental result aurees verv well with the theoretical analysis.