Motor vehicle headlight including an improved light source
US5124891A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jan 24, 1991 |
| Grant date | Jun 23, 1992 |
| Priority date | — |
| Expiry date | Jan 24, 2011 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF21S41/17
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A motor vehicle headlight comprising: a light source; a first reflector of the ellipsoid kind having a first focus situated in the vicinity of the source; a mask passing through the second focus of the first reflector and presenting a light-passing window in the vicinity of said second focus, the shape of the window being fixed and predetermined so as to define a virtual light source whose light emission pattern corresponds essentially to said shape; and a second reflector situated on the opposite side of the mask to the first reflector and having a surface which itself determines the positions of the images of the virtual source as a function of a determined photometric distribution. The headlight is particularly suitable for use with an arc lamp that is required to co-operate with a reflector capable itself of generating a beam with a sharp cutoff.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.