Optical glass, glass material for press molding, optical element, method for producing glass material for press molding, and method for producing optical element
US9481600B2 · kind B2 · utility
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Key dates
| Filing date | Jul 18, 2013 |
| Grant date | Nov 1, 2016 |
| Priority date | — |
| Expiry date | Jul 18, 2033 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B1/02
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
Provided are an optical fluorophosphate glass having excellent optical characteristics and also excellent processability, a glass material for press molding and an optical element each including the glass, and methods for producing the glass material and the optical element. The optical glass includes P5+ as a cationic component and O2− and F− as anionic components, wherein the optical glass has a content of F− of 40 anionic % or less, an abrasion factor FA of 420 or higher, and a fragility index value B of 4500 μm−1/2 or lower.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.