LASER OPTICAL DEVICE AND LASER BEAM MACHINING DEVICE

摘要

PROBLEM TO BE SOLVED: To provide a laser optical device that is designed to uniformize the intensity distribution of a laser beam which is divided by a lens array and then combinedly superposed with an image forming lens. SOLUTION: In the laser optical device for uniformizing the intensity distribution of a laser beam, the device is equipped with multiple lenses 15a, 15b which plurally divide the laser beam, a lens array 15 in which a part of the lenses are different in diameter, and an image forming lens 17 which converges the laser beam divided by each lens of this lens array.