LASER SPOT SHAPE MODIFICATION MEMBER FOR PROHIBITING EDGE CRACK OF CUTTING EDGE OF GLASS AND SURFACE TREATMENT APPARATUS HAVING THE SAME

摘要

The present invention relates to a laser spot shape changing member for changing the shape of a laser spot so that more energy is supplied to an edge portion of a glass end face portion, and a surface treatment apparatus for performing surface treatment of a glass end face portion using the laser spot shape changing member. A laser spot shape changing member according to an embodiment of the present invention is provided in a surface treatment apparatus for surface-treating a cross-section of a glass using a laser spot to change the shape of a laser spot emitted from the surface treatment apparatus Wherein the laser spot shape changing member is provided with an aperture formed so as to allow a laser beam having a larger size to pass through than the vicinity of the center in the thickness direction of the cross section of the glass.