Optical glass, glass material for press molding, and optical element
AssigneeHoya Corporation
InventorsYasuhiro Fujiwara, Yoshio Nojima
Life of this patent
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Abstract
An optical glass in the form of an oxide glass, characterized by comprising, denoted as cation percentages: P5+ 14 to 36%; Bi3+ 12 to 34%; Nb5+ 12 to 34%; Ti4+ 5 to 20%; and W6+ 0 to 22%; wherein the total content of Bi3+, Nb5+, Ti4+, and W6+ is equal to or greater than 50%; and in that the Knoop hardness is equal to or higher than 370, the refractive index nd is equal to or higher than 2.02, and the Abbé number vd is equal to or lower than 19.0. A glass material for press molding and an optical element comprised of this optical glass. A method for manufacturing a glass material for press molding comprising the step of mechanically processing this optical glass.
Claims10
An optical glass in the form of an oxide glass, denoted as cation percentages:
- P5+
- 14 to 36%;
- Bi3+
- 12 to 34%;
- Nb5+
- 12 to 34%;
- Ti4+
- 5 to 20%;
- and
- W6+
- 0 to 22%;
- wherein the total content of Bi3+, Nb5+, Ti4+, and W6+ is equal to or greater than 50%;
- and in that the Knoop hardness is equal to or higher than 370, the refractive index nd is equal to or higher than 2.02, and the Abbé number vd is equal to or lower than 19.0.
A glass material for press molding comprised of the optical glass comprising, denoted as cation percentages:
- P5+
- 14 to 36%;
- Bi3+
- 12 to 34%;
- Nb5+
- 12 to 34%;
- Ti4+
- 5 to 20%;
- and
- W6+
- 0 to 22%;
- wherein the total content of Bi3+, Nb5+, Ti4+, and W6+ is equal to or greater than 50%;
- and wherein the Knoop hardness is equal to or higher than 370, the refractive index nd is equal to or higher than 2.02, and the Abbé number vd is equal to or lower than 19.0.
An optical element comprised of the optical glass comprising, denoted as cation percentages:
- P5+
- 14 to 36%;
- Bi3+
- 12 to 34%;
- Nb5+
- 12 to 34%;
- Ti4+
- 5 to 20%;
- and
- W6+
- 0 to 22%;
- wherein the total content of Bi3+, Nb5+, Ti4+, and W6+ is equal to or greater than 50%;
- and wherein the Knoop hardness is equal to or higher than 370, the refractive index nd is equal to or higher than 2.02, and the Abbé number vd is equal to or lower than 19.0.
A method for manufacturing a glass material for press molding comprising the step of mechanically processing the optical glass comprising, denoted as cation percentages:
- P5+
- 14 to 36%;
- Bi3+
- 12 to 34%;
- Nb5+
- 12 to 34%;
- Ti4+
- 5 to 20%;
- and
- W6+
- 0 to 22%;
- wherein the total content of Bi3+, Nb5+, Ti4+, and W6+ is equal to or greater than 50%;
- and wherein the Knoop hardness is equal to or higher than 370, the refractive index nd is equal to or higher than 2.02, and the Abbe number vd is equal to or lower than 19.0.
A method for manufacturing an optical element comprising the step of press molding the glass material for press molding comprised of the optical glass comprising, denoted as cation percentages:
- P5+
- 14 to 36%;
- Bi3+
- 12 to 34%;
- Nb5+
- 12 to 34%;
- Ti4+
- 5 to 20%;
- and
- W6+
- 0 to 22%;
- wherein the total content of Bi3+, Nb5+, Ti4+, and W6+ is equal to or greater than 50%;
- and wherein the Knoop hardness is equal to or higher than 370, the refractive index nd is equal to or higher than 2.02, and the Abbé number vd is equal to or lower than 19.0.
A method for manufacturing an optical element comprising the step of mechanical processing the optical glass comprising, denoted as cation percentages:
- P5+
- 14 to 36%;
- Bi3+
- 12 to 34%;
- Nb5+
- 12 to 34%;
- Ti4+
- 5 to 20%;
- and
- W6+
- 0 to 22%;
- wherein the total content of Bi3+, Nb5+, Ti4+, and W6+ is equal to or greater than 50%;
- and wherein the Knoop hardness is equal to or higher than 370, the refractive index nd is equal to or higher than 2.02, and the Abbe number vd is equal to or lower than 19.0.
Dependencies are inferred from the claim text.