LASER BEAM MACHINING APPARATUS AND LASER BEAM MACHINING METHOD

摘要

PROBLEM TO BE SOLVED: To enable irradiation of various laser beams such as irradiation of laser beams of a straight line, a circle, a ring (doughnut shape) or the like and to enable adjustment of superimposition degree of laser beams from a plurality of optical fibers.SOLUTION: A laser beam machining apparatus includes: a plurality of optical fibers 3; a drive mechanism which drives each of the optical fibers 3; a plurality of respectively corresponding collimator lenses 5 which make the laser beams from the plurality of optical fibers 3 parallel beams; and a condenser lens 6 which condenses the parallel beams from the plurality of collimator lenses 5. The superimposition degree of the plurality of laser beams from the plurality of optical fibers 3 is adjusted by moving the plurality of optical fibers 3 through the drive mechanisms 7, 8.