A new experimental design for testing MLL of lens by a single slit is studied, and then the experimental device and program flow chart of this method are put forward.

• 概括了分数傅里叶变换的基本原理，讨论了利用分数傅里叶变换测量透镜焦距的实现方法和技术特点，提出了一种利用单缝的分数傅里叶变换测量透镜单色光焦距的实验方案，并给出了相应的程序设计思路。