Mold for molding optical glass and method of manufacturing optical glass element
AssigneeKonica Minolta Opto, Inc.
InventorsNaoyuki Fukumoto, Shunichi Hayamizu
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Abstract
A substrate protective film composed of chromium metal is formed on a molding surface of a mold base material composed of cemented carbide. The substrate protective film is oxidized by heat-treatment or ion implantation, so that a surface protective film composed of chromium oxide is formed. A pair of molds having such a constitution are prepared. Softened glass is pressed between the surface protective films of the paired molds, so that optical glass elements are molded.
Claims9
A mold for molding optical glass comprising:
- a mold base material;
- a substrate protective film composed of chromium metal formed on a molding surface of said mold base material;
- and
- a surface protective film composed of chromium oxide formed on said substrate protective film.
A method of manufacturing optical glass element, comprising the steps of:
- preparing a pair of molds including a mold base material, a substrate protective film composed of chromium metal formed on a molding surface of the mold base material, and a surface protective film composed of chromium oxide formed on the substrate protective film;
- and
- pressing glass using the paired molds.
An optical glass element manufactured by the process comprising the steps of:
- preparing a pair of molds including a mold base material, a substrate protective film composed of chromium metal formed on a molding surface of the mold base material, and a surface protective film composed of chromium oxide formed on the substrate protective film;
- and
- pressing glass using the paired molds.
Dependencies are inferred from the claim text.