Motor vehicle main beam headlamp incorporating an elliptical reflector and a parabolic reflector
US4680679A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Apr 17, 1986 |
| Grant date | Jul 14, 1987 |
| Priority date | — |
| Expiry date | Apr 17, 2006 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF21S41/365
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A headlamp of the type comprising: a light source (10); a two-focus elliptical reflector (20) having a base focus (F.sub.1) and a front focus (F.sub.2), said base focus being disposed in the vicinity of said light source and close to the base of the reflector, and said front focus being disposed in front of said base focus; and a parabolic reflector (30) having its focus (F.sub.2) in the vicinity of said front focus of said elliptical reflector. The base of the elliptical reflector is provided with an opening for directly passing light from said light source, and a first sector (40) of a parabolic type reflector is provided with its focus in the vicinity of said light source and is disposed to reflect such light after passing through said opening along the vehicle axis direction (31, 41) to increase the on-axis main beam light intensity.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.