Motor vehicle headlamp having a reflector giving selective light deviation, and methods of making such a reflector
US6186652A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 29, 1996 |
| Grant date | Feb 13, 2001 |
| Priority date | — |
| Expiry date | Mar 29, 2016 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF21S41/337
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A motor vehicle headlamp comprises a light source of predetermined geometry, and a reflector associated with the light source. The reflector is made by a method that includes the steps of: PA0 (a) establishing a reflective base surface having a reference focus and giving a predetermined distribution of the light emitted by a light source having a given geometry and a given position with respect to the reference focus, mainly in the vertical direction, PA0 (b) in at least one zone, determining a line passing through all of the points that give the same predetermined horizontal deviation of a theoretical radiation propagated from the reference focus, PA0 (c) modifying the base surface so as to put on it, substantially along the line determined in step (b), a striation for horizontal diffusion of the light, PA0 (d) making a mould in conformity with this modified surface, and PA0 (e) moulding the reflector in this mould.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.