Illumination – Light source and modifier – Including reflector
Patent
1989-03-20
1989-10-31
Dority, Carroll B.
Illumination
Light source and modifier
Including reflector
362297, 313111, 313113, 313117, F21V 700
Patent
active
048781614
ABSTRACT:
The projector-type head lamp assembly comprises a reflector having plural reflection surfaces different in reflection characteristics from each other. The reflector has disposed in the center of the reflection surface thereof a first reflection surface area extended horizontally; adjoiningly at the top and bottom, respectively, of the first reflection surface area a second reflection surface area extended horizontally; and adjoiningly to the second reflection surface areas a third reflection surface area extended horizontally. The reflection surface areas are composed of numerous fine surface elements smoothly continuous to each other. The orientations of the fine surface elements belonging to the first to third reflection surface area are so determined that the incident light rays from a light source are converged to near the center of the edge of the shade; into a horizontal zone including up to a position spaced a predetermined distance along the meridional image plane of the convex lens from the center of the edge of the shade; and into a vertical zone including up to a position extended downward from the center of the edge of the shade, respectively. Thereby, the luminous intensity distribution pattern projected in front of a car provides a sufficient horizontal divergence and intensity of light beam while keeping the high luminous intensity at the center, so that the relatively near range in front of the car is provided with a sufficiently wide horizontal illumination.
REFERENCES:
patent: 4727458 (1988-02-01), Droste et al.
patent: 4772987 (1988-09-01), Kretschmer et al.
patent: 4800467 (1989-01-01), Lindae et al.
Dority Carroll B.
Ichikoh Industries Ltd.
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