Optical glass
US5747397A · kind A · utility
51Cited by
14References
14Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 4, 1996 |
| Grant date | May 5, 1998 |
| Priority date | — |
| Expiry date | Nov 4, 2016 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S501/90
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
High rare-earth content glasses (Ln.sub.2 O.sub.3 .gtoreq.20 mol %) have applications as high optical density wavelength-selective filters, faraday rotators, scintillation glasses and high index glasses. New glasses are formed by adding TiO.sub.2 to the system SiO.sub.2 --B.sub.2 O.sub.3 --Al.sub.2 O.sub.3 --Ln.sub.2 O.sub.3. These glasses have improved optical properties, extended glass formation range and have superior resistance to devitrification. In some embodiments TiO.sub.2 can fully replace the Al.sub.2 O.sub.3. In additional embodiments, SiO.sub.2 can be completely removed from the glass.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.