为了满足激光器生产过程中快速检测激光发散角的需求，研制了一套激光发散角快速测量系统。测量系统采用焦点法测量激光发散角，利用可变光阑法确定透镜焦点处激光束的直径。为了提高测量系统的自动化程度，基于LabView软件开发平台开发了测控软件。可实现对不同孔径小孔光阑的自动更换测量，记录相应的透过能量值，计算激光束发散角，并进行保存和打印。实验结果表明，测量系统测量结果准确，测量误差小于0.05 mrad，自动化程度高、操作简便，能够满足激光发散角快速测试的要求。

In order to measure the laser beam-divergence on-line during the laser manufacture, a divergence angle measurement system for pulse laser is established. It is based on the focus method. The laser beam widths are measured by using variable aperture method. In order to improve its automation, a test software is built based on LabView software. It will realize automatic measurement with different diameter apertures, record the relevant energy, compute the dirergence angle of laser, save and type the results. Experimental results show that the error of this measurement system is below 0.05 mrad which can fulfill the requirements of divergence angle test.