Motor vehicle headlight having a reflector of complex surface shape with modified intermediate zones
US5086376A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 5, 1989 |
| Grant date | Feb 4, 1992 |
| Priority date | — |
| Expiry date | Dec 5, 2009 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF21S41/162
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A motor vehicle headlight of the type comprising a lamp having a filament (100), a reflector (200) defining an optical axis (Ox), and a closure glass (300), the filament emitting light freely in all radial directions thereabout and the reflector having a smooth and essentially continuous reflecting surface which reflects the rays emitted by the filament in such a manner as to cause the majority of them to be situated beneath a cut-off (hHc; hh) constituted by two half-planes of given height and slope. According to the invention the reflecting surface comprises a central zone (201i-206a; 210) which reflects rays from the filament so that they propagate in planes which are essentially vertical, two intermediate zones (201m, 203m, 205m; 202m, 204m, 206m; 220, 230) situated on either side of the central zone and connected thereto with continuity, which intermediate zones reflect the light rays from the filament by imparting a substantial deflection thereto in planes essentially parallel to the cut-off half-plane with the rays participating in defining the cut-off, and at least one peripheral zone (201e, 203e, 205e; 202e, 204e, 206e; 240, 250) situated beyond one or both intermediate zo…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.