本文认为，输出光束的漂移主要是器件不稳定热传导引起毛细管摆动所致。
This paper suggests that the main cause of the beam drift of laser output is capillary sway due to unstable thermal conduction.
针对激光深熔焊过程中易出现的气孔问题，作者提出光束摆动激光焊接减小气孔倾向的工艺。
Porosity is apt to occur in deep penetration laser beam welding, which has severe influence on the mechanical properties of laser welded joint.
两个悬臂在两个扇形面内的摆动，使激光束与板材产生任意的相对运动。
Two cantilevers swing in two sector surfaces so as to lead the laser beam and the plate to generate relative motions freely.
通过试件的旋转或摆动用条纹的移动来反映光束的倾斜，用条纹的稳定性来判断光轴的重合。
When the object is rotating or wiggling, the displacement of Moire fringe indicates the Angle of axis, and the stability of fringe indicates coincidence of the beam axis.
通过试件的旋转或摆动用条纹的移动来反映光束的倾斜，用条纹的稳定性来判断光轴的重合。
When the object is rotating or wiggling, the displacement of Moire fringe indicates the Angle of axis, and the stability of fringe indicates coincidence of the beam axis.
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