LASER WORKING DEVICE

PURPOSE:To decrease generation of splashes and to perform adequate laser working with deep penetration by disposing two pieces of condenser lenses on the optical path for laser light, and irradiating the condensing spot on a work. CONSTITUTION:The 1st condenser lens 10 is disposed on a laser oscillator 11 side on the optical path of laser light L which is released from a laser oscillator 11 and is advanced perpendicularly by a reflection mirror 12. The 2nd condenser lens 13 is disposed on the work 14 side coaxially with the lens 10 apart at a specified distance therefrom. Since the light L is once condensed by the lens 10, the incident angle on the surface of the lens 13 increases and an aberration is much larger than in the prior art. The preferable weld zone having a small dent with respect to the deep penetration is thus obtd.