Projection headlamp lighting system using a light conductor havi

Details Projection headlamp lighting system using a light conductor havi Projection headlamp lighting system using a light conductor havi

1992-11-30

1993-10-26

Cole, Richard R.

Illumination

Revolving

362 61, F21V 800, F21M 305

Patent

active

052571688

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 end face of the light conductor.

REFERENCES:
patent: 4389698 (1983-06-01), Cibie
patent: 4660925 (1987-03-01), McCaughan, Jr.
patent: 4811172 (1989-03-01), Davenport et al.
patent: 4868718 (1989-09-01), Davenport et al.
patent: 4949227 (1990-08-01), Finch et al.
patent: 4958263 (1990-09-01), Davenport et al.
patent: 5101325 (1992-03-01), Davenport et al.

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