LENS, AND LASER PROCESSING DEVICE EQUIPPED WITH SAME

摘要

This lens and laser processing device equipped with the lens, with respect to a material to be cut, cut off a member of an optional shape comprising a closed curve. The lens and laser processing device equipped with the lens are configured so that a convex cylindrical lens is formed from a closed path so that the line connecting the apex of a cylindrical surface of the convex cylindrical lens has the same shape as the optional shape comprising a closed curve.