LASER PROCESSING APPARATUS AND LASER PROCESSING METHOD

摘要

PROBLEM TO BE SOLVED: To prevent decline of hole quality or hole diameter accuracy caused by fluctuation of a laser beam emission start time.SOLUTION: A laser processing apparatus includes a photodetector 3 for detecting a laser beam emitted from a laser oscillator 1. After a fixed time after a laser beam emission detection time by the photodetector 3, a control part 10 controls an acousto-optic modulator 4 so that branch to a direction in which the laser beam from the laser oscillator 1 is used for processing is started.