| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a laser device, wherein a head can be miniaturized and lightened, and defocus volume can also be controlled. SOLUTION: This device is composed of a laser oscillator 10 for emitting welding laser lights, and a head part (a third mirror 4e) for radiating a welding laser light A1 emitted from the laser oscillator 10 towards a work 5. In this case, two positioning guide lasers 3a and 3b are arranged in the laser oscillator 10 in a manner that two guiding laser lights A2 and A3 emitted from the guiding lasers 3a and 3b are coaxial and unconcentric with the welding laser light A1. Also, a central point of a straight line connecting center points of the cross sections of the guiding laser lights A2 and A3 is agreed with the center point of the cross section of the welding laser light.</p> |
