高次非球面光路计算中的两个重要问题

TWO IMPORTANT MATTERS ON THE OPTCAL PATH CALCULATION OF HIGH—ORDER ASPHERICAL SURFACE

提出在高次非球面的光路计算中运用变曲率的“辅助球面”概念,对某些文献在此方面存在的问题进行分析,提出迭代逼近精度的数值判据及浮动处理方法。

A concept of variable curvature 'auxiliary sphercal surface' is put forward in the optical path calculation of high-order aspherical surface. This paper analyses the existent problems in this aspect in some references and gives the numerical criterion of iteration precision and the floatingtreatment.