Xenon ceramic lamp with integrated compound reflectors
US6200005A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 1, 1998 |
| Grant date | Mar 13, 2001 |
| Priority date | — |
| Expiry date | Dec 1, 2018 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J61/86
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A xenon ceramic lamp comprising a short-arc lamp with two integral reflectors disposed around the cathode arc ball to collect a wide range of elevation angles of light relative to the center longitudinal axis. The two integral reflectors and the cathode arc ball are within the same sealed volume of the lamp. A first reflector, generally below a common first focus, is a concave elliptical type for projecting light out through a sapphire window to a second focus. A second reflector, generally above the first focus, is a concave spherical type having its focus just offset from the first focus. Therefore, light rays may be emitted at nearly all angles from the cathode arc ball that will be reflected or back reflected by the elliptical and spherical reflectors.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.