LASER PROCESSING DEVICE, LASER PROCESSING METHOD, OPTICAL SYSTEM, AND BUILT-UP ITEM

摘要

This invention includes: a laser light source (12); a collimating part for collimating light emitted from the laser light source (12) into parallel light (L0); an optical element (14) provided with a conversion part for converting the parallel light (L0) into light beams (L1, L2) comprising a plurality of parallel light rays having different optical axes, and transmitting the light beams (L1, L2); and a condensing part (16) for condensing the light beams (L1, L2) towards a workpiece.