带有运动光学元件的激光材料加工机中 ,激光源到聚焦光学元件之间的光路长短决定于加工空间内工作头所处的位置。材料加工的需要使工作空间趋向逐渐增大 ,这就使光路变长 ,加工过程发生变化 ,以至超出规定的公差 ,造成所生产零件质量的下降。光束变粗使聚焦元件处的照度下降和? In laser material processing machines with moving optics, the length of the light path between the laser source and the focusing optics depends on the position of the working head in the working space. Material processing needs to make the work space tends to increase, which makes the light path longer, the process changes, even beyond the specified tolerance, resulting in the quality of parts produced by the decline. Beam thickening so that the focus of the Department of illumination decreased and?