Patent ID: 6881925
Filing Date: 2005-04-19
Classification: B23K

Abstract:
1. A laser-beam emitting head for irradiating a portion to be machined with laser beams outputted from a laser unit, said laser-beam emitting head comprising: an emitting head body having a light guide member for guiding the laser beams; a converging lens for converging the laser beams guided from the light guide member in the head; a reflecting mirror for irradiating the portion to be machined with the converged laser beams, wherein the reflecting mirror is located behind the converging lens on a downstream side of a light advancing direction; mirror rotating means for rotatively holding the reflecting mirror around the optical axis of the laser beam; distance-adjustment means for adjusting the relative distance between the reflecting mirror and the converging lens; and moving means for moving said reflecting mirror and said converging lens with the relative distance being maintained, wherein said light guide member in the head, said converging lens and said reflecting mirror are inserted to and withdrawn from the portion to be machined in a narrow gap.