LASER LIGHT IRRADIATION APPARATUS AND LASER LIGHT IRRADIATION METHOD

摘要

PROBLEM TO BE SOLVED: To provide a laser light irradiation apparatus and a laser light irradiation method where output fluctuation is inhibited and output of laser light to be emitted is stabilized.SOLUTION: A laser light irradiation apparatus 10 for irradiating a film with laser light in order to cut the film comprises: a laser light oscillator 1 for oscillating the laser light L; a beam splitter 3 for splitting the laser light L oscillated from the laser light oscillator 1 into two to irradiate the film with laser light being reflected light L1; a power sensor 4 for measuring intensity of laser light being transmitted light L2; and a processing board 5 for calculating an output value of the laser light oscillator 1 from the measured intensity, for determining magnitude of the output value in relation to a set value, and for correcting the output value of the laser light oscillator 1 so as to bring the output value thereof close to the set value.