DEVICE AND METHOD OF LASER PROCESSING DEVICE

PROBLEM TO BE SOLVED: To obtain a processing device which can correspond to various processing patterns flexibly and heighten working efficiency by installing a laser light source, and plural diffraction optical elements for modulating the laser lights to a circular disk. SOLUTION: A laser light L1a ejected from a laser light source 1 is adjusted in its light volume by an ND filter of a light volume variable part 2, and the laser light 1b outputted from the light volume variable part 2 is incident on a variable aperture 3 so as to form wave forms. The laser light L1c outputted from the variable aperture 3 is then incident on a light modulator H. The light modulator H comprises a rotation disc D, a rotation axis 10, a pulse motor M, or the like. The rotation disc D is a transmission type that plural diffraction optical elements are formed on the surface. A pulse motor M for rotating the rotation disc D is driven by control of a control unit C while synchronizing with an output timing of the laser light L1a, so as to radiate the laser light L1c selectively against the desired diffraction optical elements.