LASER MACHINING DEVICE WITH SELECTABILITY OF BEAM SHAPE

摘要

A liquid crystal device (17) is disposed on an optical path for irradiating a workpiece (24) with a laser beam from a laser (11). The laser beam is applied via the liquid crystal device to the workpiece after the diameter of the laser beam is enlarged by an expander (14). A beam cross-sectional pattern, which defines desired configuration and a desired intensity distribution of the laser beam, is selectively displayed on the liquid crystal device.