| Aspheric liquid lens has the advantages of zoom and aberration correction,and has a wide range of application prospects.For example,it can be used in the study of human eye model.The refractive elements in human eye have the characteristics of aspheric surface and the ability of focusing automatically.Aspherical liquid lens can be used to achieve the two requirements at the same time.Based on the principle of liquid lens driven by electro wetting,the electro-wetting liquid lens is designed by using the structure of square cavity.The characteristics of aspheric surface are analyzed,and the specific devices are built to evaluate the optical characteristics.Moreover,various factors affecting the stability of the interface are analyzed.The main research work is as follows:1.In this paper,the research background and significance of this topic are described,the research status of liquid lens and the theoretical knowledge of aspheric liquid lens are introduced,and the relevant principle formulas of the theoretical basis of electrowetting are deduced.2.Based on the characteristic that liquid density difference can cause aspheric surface,the aspheric double liquid lens model with square cavity structure is designed by using COMSOL simulation software,and the aspheric surface under different voltages is obtained.The fitting analysis is carried out with MATLAB.3.The specific lens model is built and processed,and the surface change of aspheric double liquid lens is researched experimentally.The experimental results are analyzed by MATLAB image processing.4.The influence of liquid material,lens parameters and other factors on the stability time of liquid interface is analyzed by simulation. |
