Low-dazzle headlamp for a motor vehicle
US5477440A · kind A · utility
5Cited by
6References
5Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Apr 25, 1994 |
| Grant date | Dec 19, 1995 |
| Priority date | — |
| Expiry date | Apr 25, 2014 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF21S41/338
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A motor vehicle headlamp has a cover glass closing a reflector that contains a light source. The reflector comprises upper and lower portions joined through a reflective base. Its lower portion is reflective and/or diffusive, while its upper portion has reflective means which at least partly retransmit light from the source in a beam passing through the cover glass. The reflecting means comprise cylindro-elliptical or ellipsoidal Fresnel ribs which concentrate the reflected beam in a focal zone in front of the cover glass. The beam diverges beyond this focal zone.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.