Controlling the vapor pressure of a mercury lamp
US4746832A · kind A · utility
6Cited by
3References
13Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 31, 1985 |
| Grant date | May 24, 1988 |
| Priority date | — |
| Expiry date | Dec 31, 2005 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J61/12
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
The invention described herein discloses a method and apparatus for controlling the Hg vapor pressure within a lamp. This is done by establishing and controlling two temperature zones within the lamp. One zone is colder than the other zone. The first zone is called the cold spot. By controlling the temperature of the cold spot, the Hg vapor pressure within the lamp is controlled. Likewise, by controlling the Hg vapor pressure of the lamp, the intensity and linewidth of the radiation emitted from the lamp is controlled.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.