DEVICE AND METHOD FOR LASER BEAM MACHINING

摘要

PROBLEM TO BE SOLVED: To provide a laser beam machining device with which an excellent machining shape is obtained by preventing the generation of plural converging spots. SOLUTION: The laser machining device, with which a predetermined position of a work 7 is drilled by irradiating the work 7 with a laser beam 2 emitted from a laser oscillator 1 and condensed by an fθlens 5, is provided with a wave length selection means 3 which selectively makes only a predetermined wave length of the laser beam 2 pass between the laser oscillator 1 and the work 7.