Motor vehicle headlight with a transverse source capable of emitting a beam with a sharp cut-off
US6142658A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jan 27, 1999 |
| Grant date | Nov 7, 2000 |
| Priority date | — |
| Expiry date | Jan 27, 2019 |
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 comprises a light source having a given geometry, a mirror and a lens. The mirror co-operates with the source to generate a beam delimited by a cut-off at least part of which is horizontal. The source has the general shape of a cylinder having a horizontal axis perpendicular to an optical axis and a length less than the width of the mirror. At least one vertical section of the mirror has a profile such that a ray emitted tangentially by an edge of the source is reflected parallel to the optical axis and rays emitted by the rest of the source are reflected downwards relative to the optical axis. The mirror has at the height of the source a horizontal section adapted to assure a predetermined horizontal distribution of light.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.