Projection lamp comprising single ended arc discharge lamp and an interference filter
US4386292A · kind A · utility
10Cited by
5References
4Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 2, 1980 |
| Grant date | May 31, 1983 |
| Priority date | — |
| Expiry date | Jul 2, 2000 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03B21/2026
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A projection lamp comprises a single-ended metal halide arc discharge lamp disposed within a curved reflector and an interference filter disposed in front of the reflector, the filter being highly transmissive of visible light and reflective of radiation for which the metal halide, in molten salt form, is highly absorptive.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.