简述了激光光束的基本参数及特性，并介绍了采用 CCD进行激光发散角测量的基本原理和装置。用 CCD测量光斑可以及时获得光斑的二维扫描结果。实际工程应用时常采用 CCD来测量激光远场发散角。进一步介绍了使用 CCD摄像法进行发散角测量所采用的系统软件设计，首次提出了采用图像处理的方法来捕捉脉冲激光光斑。

This paper demonstrated the basic parameters and characteristics of laser beam, and introduced the basic principles and the devices used in the CCD laser divergence angle measurement method. Using CCD to measure the beam spot can gain the two-dimensional scanned result in a real-time manager. As a result, CCD was always used to measure Far-field divergence angle of the laser beam in the real engineering applications. The paper also made a further introduction of software design in the measuring system using CCD camera method. Finally, it is the first time that by the image-processing method to acquire pulse laser spot is introduced.