Achromatic lens for ultraviolet rays
US5028967A · kind A · utility
15Cited by
5References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 16, 1990 |
| Grant date | Jul 2, 1991 |
| Priority date | — |
| Expiry date | Mar 16, 2010 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC03C2201/31
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
An achromatic lens for ultraviolet rays constituted by (A) high-purity silica glass having a purity of 99.9% or more, or fluorine-containing, high-purity silica glass having a purity of 99.9% or more; and (B) silica glass containing germanium dioxide or silica glass containing germanium dioxide and boron oxide.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.