提出了一种渐进自由曲面镜片的光学性能仿真方法, 能够在镜片的设计阶段对镜片的光焦度和散光分布进行仿真分析。采用双三次样条曲面拟合法, 通过计算自由曲面镜片面型离散点数据局部点云拟合曲面的函数, 得到曲面上各点的主曲率, 进而得到渐进自由曲面镜片的光焦度和散光分布。结果显示仿真方法得到的镜片光焦度和散光分布图与基于莫尔偏折法原理的FFV软件仿真和实际加工得到镜片的测量结果相类似。

Considering the habitual conduct of using eyes, a new design method for progressive addition spectacle lenses based on multi-optical-axis system is proposed. The surface fitting method of the double three spline surface is used to calculate the function of the part point cloud fitting surface for the disperse points data of freeform lenses. The principal curvatures of each point are calculated to obtain the distribution of power and astigmatism by the fitting surface expression. The results show that the optical focal and astigmatism of the lens are similar to that of the FFV software simulation and the actual machining of the lens.