Automotive headlamp having reduced chromatic aberration

Details Automotive headlamp having reduced chromatic aberration Automotive headlamp having reduced chromatic aberration

1990-09-11

1991-06-04

Husar, Stephen F.

Illumination

Vehicle steering mechanism or element moves pivoted lamp or...

Tie rod element controlled

362268, 362305, B60Q 100

Patent

active

050219308

ABSTRACT:
The present invention relates to an automotive headlamp construction in which chromatic aberation is substantially eliminated. The headlamp includes an elliptic reflector, a light source disposed at a first focal point of the elliptic reflector, a condenser lens which is focused generally at a second focal point of the elliptic reflector, and an outer lens provided in front of the condenser lens. In accordance with the invention, the radius of curvature of the outer lens is reduced at a vertically middle portion thereof to form an angled portion through which light from the light source passes. The angled portion acts as a lens having a focal length such that chromatic aberration of the condenser lens is canceled out.

REFERENCES:
patent: 3578966 (1971-05-01), Levin
patent: 4914747 (1990-04-01), Nino
patent: 4928213 (1990-05-01), Nakata
patent: 4953063 (1990-08-01), Nino

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