Patent 7383701 was granted and assigned to Konica on June, 2008 by the United States Patent and Trademark Office.
A molding die for an optical element, comprises a die base body formed by shaping an amorphous alloy having a super-cooled liquid phase, and a die face formed by applying a die face forming process onto a part of the die base body and used to form an optical surface of the optical element or a dimensional reference surface.