Par lamp

Details Par lamp Par lamp

1985-09-06

1987-03-17

Cross, E. Rollins

Illumination

Light source and modifier

Including reflector

362310, 362348, 362336, F21V 700

Patent

active

046512616

ABSTRACT:
The invention relates to a headlamp, the envelope of which is constituted internally by concave reflecting surfaces but at least by one concave reflecting surface having the shape of a paraboloid of rotation, further, in the focus of said paraboloid-shape reflecting surface a light-emitting element is accommodated with its center line being perpendicular to the axis of the reflecting surface, further, having said envelope shut up with a transparent cover plate, the surface of which is uniformly roughened, and/or on said surface uniformly distributed, geometrically regular beam-forming optical elememts are provided. Essential feature of the invention consists of having over the cover plate (1) also irregularly-shaped oblong beam-forming optical elements, the longitudinal axes of which are parallel with the center line (10) of the light-emitting element (2). Said oblong beam-forming optical elements are expediently cylindrical lenses (5, 6, 7, 8) or prisms.

REFERENCES:
patent: 1918087 (1933-07-01), Donley
patent: 2260736 (1941-10-01), Benton
patent: 3309554 (1967-03-01), Corenzo
patent: 4209825 (1980-06-01), Shackelford
patent: 4484254 (1984-11-01), Puckett et al.

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