Projection headlamp lighting system using a light conductor having stepped termination
US5257168A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 30, 1992 |
| Grant date | Oct 26, 1993 |
| Priority date | — |
| Expiry date | Nov 30, 2012 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF21W2102/155
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A projection headlamp lighting system includes a light source to generate light, a light distributing arrangement to distribute the light to a preselected lighting position, and a light projecting arrangement at the lighting position to project the light in the desired pattern. The light distributing arrangement includes at least one elongated optical light conductor having respective input and output ends. The light projecting arrangement includes an optical structure in the configuration of at least one stair step attached to and protruding axially outwardly from a transverse end face on the output end of the light conductor, and a collector lens being spaced from the outer end of the light conductor. More particularly, the collector lens is spaced from an outer terminal end of the protruding step at a distance substantially equal to the focal length of the lens such that the lens is capable of gathering light projected both from the outer terminal end of the protruding step and the remainder of the output end of the light conductor and projecting the desired light pattern having a first portion focussed by the protruding step and a second portion spread by the remainder of the e…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.