High efficiency glass halogen lamp with interference coating
US8461754B2 · kind B2 · utility
2Cited by
5References
23Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 21, 2009 |
| Grant date | Jun 11, 2013 |
| Priority date | — |
| Expiry date | Oct 20, 2030 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02B20/00
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
The disclosure provides a light-transmissive glass halogen filament tube with a filament light source having a coil concentricity ratio of not greater than 20% disposed therein, the filament tube having a multi-layer optical interference coating deposited on the outer surface thereof that transmits visible radiation from about 400-750 nm and reflects infra red radiation from about 800-2500 nm back to the filament for re-absorption, the coated filament tube exhibiting an LPW gain of at least 26%.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.