曲面复眼玻璃透镜模压过程仿真研究

Simulation of Molding Process for a Curved Compound Eye Glass Lens

为了揭示曲面复眼玻璃透镜光学精密模压过程中各个子眼应力分布变化状况,通过建立有限元模型,应用MSC.Marc有限元软件对不同工艺参数下的玻璃透镜模压、保压阶段进行了仿真研究,得到了温度、模压速率、模压力对各子眼应力的影响规律和模压力、位移曲线。然后,对不同模压方式下应力变化过程进行研究,发现在球形预形体变形量较大的场合,恒速率模压工况会出现随下压量增加导致外力过大、阻碍应力松弛的现象。最后,对保压阶段进行研究,得到了不同保压力对填充效果和子眼应力分布的影响规律。

This study aimed to investigate the changes in stress distribution of each compound eye during optical precision molding of curved compound eye lens.This paper built a finite element model using MSC.Marc to present a simulation study of the molding and holding stages of the glass lens under different process parameters.For this,the effect of temperature,molding velocity,and molding pressure on the stress of each compound eye,as well as the molding pressure and displacement curves,were obtained.Our findings for spherical preforms with a large deformation showed that the constant velocity molding condition increased downward displacement,leading to excessive external forces that prevent stress relaxation.The holding stage was further studied to obtain the pattern of effect of different holding forces on the filling effect and stress distribution in the compound eye.