Motor vehicle headlight with an active base zone
US6520668B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Mar 17, 2000 |
| Grant date | Feb 18, 2003 |
| Priority date | — |
| Expiry date | Mar 17, 2020 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF21S41/173
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A motor vehicle headlight has a light source cooperating with a reflector to produce a light beam. The reflector has an active base region immediately behind the light source, and is arranged to reflect the radiation from the source to produce a beam of given photometry. The said base region includes, in at least one zone from which light would, in the absence of the invention, be reflected back to the close vicinity of the light source, a corrected reflective surface which produces corrected radiation that remains spaced away from the vicinity of the source without disturbing the photometry. Reflection back to the source, and consequently the danger of overheating the source and/or production of parasitic images, are eliminated.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.