| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To prevent degradation of the laser beam output due to deposition of spatter on a protective glass to protect a laser optical system. <P>SOLUTION: A spatter deposition area E on a protective glass 9 is limited by deflecting the spatter scattering direction by an air shutter 5. Laser beams L are divided into two systems of laser beams La and Lb by a prism 6 so as to avoid the spatter deposition area E, and the two systems of laser beams La and Lb are condensed at a substantially same welding position P on a work W to be welded. The interference of the spatter deposition area E with the laser beams La and Lb is prevented in advance. <P>COPYRIGHT: (C)2005,JPO&NCIPI</p> |
