Microwave generated plasma light source apparatus
US4498029A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 2, 1984 |
| Grant date | Feb 5, 1985 |
| Priority date | — |
| Expiry date | Jul 2, 2004 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J61/54
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A microwave generated plasma light source including a microwave generator, a microwave cavity having a light reflecting member forming at least a portion of the cavity, and a member transparent to light and opaque to microwaves disposed across an opening of the cavity opposite the feeding opening through which the microwave generator is coupled. An electrodeless discharge bulb is disposed at a position in the cavity such that the cavity operates as a resonant cavity at least when the bulb is emitting light. In the bulb is encapsulated at least one discharge light emissive substance. The bulb has a shape and is sufficiently small that the bulb acts substantially as a point light source.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.