Lamp with stepped reflector surface containing vertical ribs

Details Lamp with stepped reflector surface containing vertical ribs Lamp with stepped reflector surface containing vertical ribs

1980-06-24

1982-09-21

Nelson, Peter A.

Illumination

Multiple filament light unit

With corrugated, faceted or fluted reflector and/or lens

362304, 362310, 362346, 362348, 362350, F21M 308

Patent

active

043510183

ABSTRACT:
In a motor vehicle headlamp or the like, the required distribution of the light rays is achieved entirely by selecting an appropriate configuration for the reflector; the front glass is a plain glass having smooth front and rear surfaces. The reflector surface is, as far as possible, a plain paraboloidal surface, but is provided with elongate ribs in selected zones, to produce a spreading of the light rays reflected from these ribs; the light is spread transversely to the length of the ribs. The reflector surface also has offset portions which, like the basic reflector shape, are paraboloidal, but have their focus or foci displaced from the focus of the basic reflector shape.

REFERENCES:
patent: Re17825 (1930-10-01), Linton et al.
patent: 2174937 (1939-10-01), Dietz
patent: 3688149 (1972-08-01), Pitkjaan
patent: 4143412 (1979-03-01), Sassmannshausen
patent: 4149229 (1979-04-01), Draper
patent: 4225903 (1980-09-01), Buchleitner
patent: 4277821 (1981-07-01), Sassmannshausen

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