Optical glass
US7838450B2 · kind B2 · utility
1Cited by
8References
15Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 10, 2007 |
| Grant date | Nov 23, 2010 |
| Priority date | — |
| Expiry date | Feb 9, 2028 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC03C1/00
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
An optical glass having a refractive index (nd) within a range from 141 to 1.47 and an Abbe number (νd) within a range from 90 to 100 comprises in mass % on element basis:and comprises, as an essential component, one or more elements selected from the group consisting of Ca, Sr and Ba. In this optical glass, the ratio (Si+B+P+Al)/F is within a range from 0.15 to 0.40.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.