Dimmed vehicle headlight

Details Dimmed vehicle headlight Dimmed vehicle headlight

1984-11-09

1986-09-16

Cox, Ronald B.

Illumination

Light source and modifier

Including reflector

362304, 362346, 362341, F21U 700

Patent

active

046126082

ABSTRACT:
The invention provides a headlight for a motor vehicle with a concave reflector, which has a light filament disposed in its inner part with the longitudinal axis of the filament about in parallel with the direction of the outgoing beam. The reflector is composed of a surface spanned by nearly parabolic branches generated by the intersection of the reflector and of planes including the axis of the reflector. The upper part of the reflector includes parabola branches having a focal point close to the vertex point and a focal point more remote from the vertex. At least the lower part of the reflector has the focal points of the conical sections near parabolic branches form a focal line, where the length of the focal line coincides at least in part about with the position and length of the incandescent filament. The section through the transition between upper and lower reflector part is represented by a cone section, which is nearly parabolic.

REFERENCES:
patent: 3176124 (1965-03-01), Cibie
patent: 3688149 (1972-08-01), Pitkjaan
patent: 4351018 (1982-09-01), Fratty

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