Illumination – Vehicle steering mechanism or element moves pivoted lamp or... – Tie rod element controlled
Patent
1993-11-12
1995-04-11
Lazarus, Ira S.
Illumination
Vehicle steering mechanism or element moves pivoted lamp or...
Tie rod element controlled
362346, 362304, 362215, 362297, 362348, B60Q 104
Patent
active
054064643
ABSTRACT:
A reflector for a vehicular headlamp in which glare formed by light reflected from a stepped part at the boundary of the adjacent segments constituting a reflector is reduced. Of the distribution control segmental areas on the reflecting surface, a first reflecting area consisting of an aggregation of hyperbolic paraboloid segments forms a pattern widely diffused in the horizontal direction. Second reflecting areas each consisting of elliptic paraboloid segments form a pattern contributing to the formation of the luminous-intensity center of a distribution pattern. A third reflecting area consisting of an aggregation of paraboloid-of-revolution segments forms a pattern contributing to the formation of a cut line tilted a given angle with respect to the horizontal line in the distribution pattern of a passing beam. The focal distance of the reference surface for the paraboloid-of-revolution surface changes for each segment. The focal distance becomes smaller the higher the segment location is on the reflecting surface, and the farther the distance of the reflecting segment from the vertical plane including the optical axis the greater the focal distance.
REFERENCES:
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patent: 4208704 (1990-06-01), Draper
patent: 4704661 (1987-11-01), Kosmatka
patent: 4779179 (1988-10-01), Oyama et al.
patent: 5067053 (1991-11-01), Akizuki
patent: 5171082 (1992-12-01), Watanabe
Koito Manufacturing Co. Ltd.
Lazarus Ira S.
Sember Thomas M.
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