【摘要】 本文叙述了光热光束偏转方法的基本原理,介绍了一种新的应用光热光束偏转方法测量聚焦激光束的特征参数及聚焦透镜焦距的方法。实验测量了经单一锗透镜聚焦后的CO₂激光束的腰斑半径和位置,同时确定了聚焦锗透镜的焦距,其结果与实际情况一致。更多还原

【Abstract】 The basic principle of photo-thermal optical beam deflection is described, A new method for measuring the characteristic parameters of focused laser beam and the focal length of the focusing lens by photothermal optical beam deflection method is introduced. The radius and position of waist spot of CO2 laser beam focused by a single Ge lens were measured experimentally, and the focal length of the Ge lens was determined. The result is in agreement with that obtained in practice.更多还原