本文是我所光路计算程序的一个说明.它介绍了程序的功能,列出了程序中所用的全部计算公式,并说明其来源和物理意义.程序仅追迹了四个视场的三十四条光线,算出这四个视场的点列图和每个视场的五个离焦位置、四个特征频率和两种方位物分布的光学传递函数(OTF)值.程序通过光路计算直接算出几何像差(视场和孔径),样点虽然不多(34个样点),但因它们是按切比雪夫求积公式的节点分布的,所以这些几何像差值的等权平均就能相当好地反映整个画面、整个光瞳内的像差情况.本计算程序由于运用像差理论,其优点可少算光线,而获得较多的有用信息,且能较准确全面地评价光学系统质量,是一个通用性强、计算速度快的光学计算程序.

This paper describes a general ray tracing program. Both the program and the formula used in the program are given, the program traces only thirty-four light rays in four fields of view, it can calculate the spot diagrams of these four fields and the optical transfer functions of five focusing positions, four special frequencies and two azimuth space frequency distributions of the four fields of view. The program can evaluate the performance of an optical system accurately, it has traced fewer light rays and and obtain more useful informations.