理想成像系统调制度传递函数的简要分析

A Concise Analysis on Modulation Transfer Function of Ideal Image Formation System

运用简单干涉、衍射原理，辅以作图来分析透镜成像的调制度传递函数和截止频率，物理图象清晰，便于普及光学传递函数这一重要知识，同时很容易得到相干成像的截止频率与照明光入射角有关的这一重要结论。

The article is helpful in generalizing the knowledge of optiodransfer function. With the aid of graphing,the authors analyZed themodulation transfer function and cutoff frequency of lens imapeformation by using simple principles of interference and diffraction oflight. Reading through the article, one can easily conclude that thecutoff frequency of coherent image formation bears a relationship tothe angle of incidence of an illuminator.