Vehicular low beam headlight reflector consisting of upper and l

Details Vehicular low beam headlight reflector consisting of upper and l Vehicular low beam headlight reflector consisting of upper and l

1993-09-24

1996-05-21

Lazarus, Ira S.

Illumination

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

Tie rod element controlled

362297, 362347, B60Q 102

Patent

active

055195890

ABSTRACT:
A reflecting surface is divided into first and second reflecting sectors by a plane inclined from the horizontal plane including the optical axis to occupy the upper half and the lower half of the reflecting surface, respectively. A fundamental surface of the first and second reflecting sectors has a reference parabola in the inclined plane, and is a collection of intersecting lines each obtained by cutting an imaginary paraboloid of revolution having an axis extending in a direction taken by a ray after being emitted from a reference point and then reflected at a reflecting point on a parabola that is an orthogonal projection of the reference parabola onto the horizontal plane, passing through the reflecting point, and having a focus at the reference point by a vertical plane including the ray vector. The focus of the reference parabola is set at the center of a filament. The reference point is set in the vicinity of the rear end of the filament for the first reflecting sector, and in the vicinity of the front end of the filament for the second reflecting sector.

REFERENCES:
patent: 4772988 (1988-09-01), Brun
patent: 4841423 (1989-06-01), Luciani
patent: 5003447 (1991-03-01), James et al.
patent: 5192124 (1993-03-01), Kawashima et al.

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