中文说明：
程序的主要目的是获得光学传递函数，通过光程差获得光瞳函数，之后获得点扩散函数，最终得到光学传递函数。
English Description：
The main purpose of the program is to obtain the optical transfer function, the pupil function through the optical path difference, then the point spread function, and finally the optical transfer function.