In this paper, a liquid progressive multifocal lens with solid-liquid structure is demonstrated, which mainly consists of two elastic polydimethylsiloxane (PDMS) membranes, a solid substrate and liquid. To realize the adjustment of the focuses progressively, the thickness of one of the membrane is designed non-uniform. By controlling the liquid pressure working on the membranes, the curvature of the membrane can be changed continuously and the power of the lens can be altered simultaneously. In this paper, the structure and a fabrication method of the lens is introduced, and a power distribution model is built for the calculation of the power distribution characteristics. Moreover, the deformation of the non-uniform elastic membrane of the lens under different pressures is analysed with finite element method (FEM). Finally, a prototype of the lens is developed and tested by applying a micro laser displacement sensor, and it is demonstrated that the progressive multifocal lens is feasible. A novel liquid progressive multifocal lens with a non-uniform thickness elastic membrane is proposed. From the simulation and experimental investigation, it can be concluded that the proposed liquid lens can realize progressive multifocal through using non-uniform elastic membrane and the power can be adjusted by the pressure which is controlled by the liquid volume filled in the lens.

中文翻译：

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液体渐进多焦点镜片，由于液体压力的变化，可通过不均匀弹性膜的变形进行调节

本文介绍了一种具有固液结构的液体渐进多焦点镜片，它主要由两个弹性聚二甲基硅氧烷（PDMS）膜，一个固体基质和一个液体组成。为了逐步实现焦点的调节，将膜之一的厚度设计为不均匀的。通过控制作用在膜片上的液体压力，可以连续改变膜片的曲率，并且可以同时改变镜片的屈光力。本文介绍了镜片的结构和制造方法，并建立了配光模型来计算配光特性。此外，利用有限元方法（FEM）分析了在不同压力下镜片非均匀弹性膜的变形。最后，通过使用微激光位移传感器开发并测试了镜片的原型，并证明了渐进多焦点镜片是可行的。提出了一种厚度不均匀的弹性膜的新型液体渐进多焦点镜片。从仿真和实验研究可以得出结论，所提出的液体透镜可以通过使用不均匀的弹性膜来实现渐进多焦点，并且可以通过由透镜中填充的液体量控制的压力来调节屈光力。