以现代激光工业制造为应用背景，探讨激光光束光斑质量诊断技术的发展。从光束束宽的定义出发，对比了两种束宽定义方法的不同，阐述了光束质量诊断与光束束宽定义之间的关系。依据国家和国际标准，研究了光束束宽、束散角测量和计算方法的发展，以基于空心探针原理的光束光斑质量诊断技术及设备为重点研究内容，介绍了基于实测目的的测量方法。分析结果表明，以包含功率（或能量）占总功率百分比定义的束宽为基础，基于空心探针原理的激光光束光斑质量诊断技术结合双曲线拟合方法计算，能够更好地反映激光束的传输和聚焦性能，诠释激光制造系统的制造能力。

Based on the background of application of modern laser industrial manufacturing, the diagnostic technology of laser beam is discussed. Starting from the definition of laser beam width, two different kinds of laser beam width definition are compared. The relationship between laser beam diagnostic technology and definition of laser beam width is described. Then, according to the development of national and international standards, the beam width, beam divergence angle measurement and calculation are presented. Focusing on the principle and equipment based on the principle of hollow needle, the method with purpose on engineering application is discussed. The analysis results show that the definition including power (or energy) defined percentage of the total power beam width is better suitable for engineering application and the beam diagnostic technology based on hollow needle combined with hyperbolic fitting method, and it will well define the lasers performance capability.