OPTICAL ELEMENT MOLDING DIE AND ITS MANUFACTURE

摘要

PROBLEM TO BE SOLVED: To provide a mold for molding an optical element of superior precision processing properties, heat resistance and resistance to oxidization which is inactive chemically to an optical element material. SOLUTION: A mold main body 1b (Cu-Zn-Pb alloy) is superfine precision processed on a press surface 5 of the shape of a desired optical element by cutting using a diamond bit 4 as shown on the figure (a). Then an intermediate film 3 (Cu-Pt) is formed on the press surface 5 as shown on the figure (b), and also a protective film 2b (Pt-Re) is formed as shown on the figure (c).