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US 2005/0231815 A1Published application
Mother glass composition for graded index lens, graded index lens, manufacturing method of graded index lens, optical product and optical instrument using the same
AssigneeNippon Sheet Glass Co., Ltd.
InventorsTaro Miyauchi, Kazuya Ohkawa, Tatsufumi Shiba, Tomizo Matsuyama
Life of this patent
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Abstract
A mother glass composition for graded index lenses, comprising the following glass components in mol %: 40≦SiO2≦65, 1≦TiO2≦10, 0≦MgO≦22, 2≦Li2O≦18, 2≦Na2O≦20, 6≦Li2O+Na2O≦38, and from 0.1 to 15 mol % of any two or more of CaO, SrO and BaO, a graded index lens using the mother glass composition, a manufacturing method of the graded index lens, and an optical product and an optical instrument using the graded index lens, are provided.
Claims13
A mother glass composition for graded index lenses, which comprises the following glass components in mol %:
- 40≦SiO2≦65,
- 1≦TiO2≦10,
- 0≦MgO≦22,
- 2≦Li2O≦18,
- 2≦Na2O≦20,
- 6≦Li2O+Na2O≦38, and
- 1≦any two or more of CaO, SrO and BaO≦15.
4 more elements
Dependencies are inferred from the claim text.