Gradient index silicate glass
US5448409A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Nov 12, 1993 |
| Grant date | Sep 5, 1995 |
| Priority date | — |
| Expiry date | Nov 12, 2013 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B3/0087
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A gradient index silicate glass is disclosed, which comprises a silicate glass and, incorporated therein, barium, at least one first metal selected from the group consisting of lead, titanium, niobium and tantalum and at least one second metal selected from the group consisting of potassium and sodium. The barium and the first and second metals have either protrudent and recessed concentration distribution profiles, respectively, or recessed and protrudent concentration distribution profiles, respectively. The gradient index silicate glass has a dispersion distribution of A DIRECTION permitting a highly effective optical design, and can be stably produced at low cost on a large commercial scale.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.