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.
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。
According to acquisition and tracking strategy and laser detection theory, an expression of the best Angle of beam divergence under direct detection is provided.
根据捕获跟踪策略和激光检测理论，给出了直接探测情况下最佳光束发散角的表示式。
In conditions that the laser gains can be obtained, the relations between the maximal allowable divergence Angle of incident electron beam and other physical parameters are discussed.
在获得激光增益的条件下，讨论了入射电子束的最大许可发散角与其它物理参数之间的关系。
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