Motor vehicle headlamp having a discharge lamp with masks and a

Details Motor vehicle headlamp having a discharge lamp with masks and a Motor vehicle headlamp having a discharge lamp with masks and a

1997-11-07

2000-01-25

O'Shea, Sandra

Illumination

Light source and modifier

Including reflector

362516, 362517, 362518, 362539, 362303, 362305, 362348, 362255, 362256, F21V 700

Patent

active

060171383

ABSTRACT:
A motor vehicle headlamp has a discharge lamp, a reflector and a smooth or nearly smooth cover lens, the reflector being adapted to generate a beam below a cut-off line. At least two masks are associated with the discharge lamp, and define two shadow zones on the reflector; the reflector includes at least two reflective zones for forming portions of the beam below the cut-off line, with different amounts of sideways spreading of the light; and these zones of the reflector are separated by generally radial transition planes, at least some of which extend into the shadow zones. A particular application is to enable wide cruising beams to be produced to European standards without any optical anomalies.

REFERENCES:
patent: 4100594 (1978-07-01), Gould
patent: 5086376 (1992-02-01), Blusseau
patent: 5299101 (1994-03-01), Serizawa
patent: 5567044 (1996-10-01), Lopez
patent: 5671995 (1997-09-01), Serizawa et al.
French Search Report dated Aug. 8, 1997.

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