Motor vehicle headlight, suitable for emitting a beam limited by a cut-off, and including a modified rear portion
US4803601A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 31, 1987 |
| Grant date | Feb 7, 1989 |
| Priority date | — |
| Expiry date | Dec 31, 2007 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF21S41/164
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A motor vehicle headlight of the type suitable for emitting at least one beam that is delimited by a top cut-off and that includes an approximately central concentration spot, the headlight comprising: a filament lamp (100); a reflector (200); and a closure glass (300); the headlight including the improvements whereby said reflector comprises: at least two lateral zones (202, 202') that form small images of the filament defining said concentration spot and forming said cut-off; and a central zone (201, 201, 203, 203') which reflects the light rays emitted by the filament to cause them to converge in a region at a substantial distance from the closure glass while simultaneously forming large filament images which are spread out below said cut-off; with said lateral zones and said central zone joining one another with second order continuity in two essentially vertical planes that are parallel to a central optical axis of the headlight and are disposed on either side thereof.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.