Illumination – Vehicle steering mechanism or element moves pivoted lamp or... – Tie rod element controlled
Patent
1992-09-09
1995-03-21
Lazarus, Ira S.
Illumination
Vehicle steering mechanism or element moves pivoted lamp or...
Tie rod element controlled
362297, 362346, B60Q 104
Patent
active
054002265
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
The present invention relates to a headlamp for motor vehicles.
More particularly, it relates to a headlamp for motor vehicles, particular high beam headlights, which has a reflector with a central and peripheral region having different reflecting surfaces, a discontinuity at the transition between the regions, a light disc which covers a light outlet opening of the reflector, and a luminous element arranged on the center axis of the reflector.
Such a headlamp is known from DE-PS 753 691. This headlamp has a reflector with a central region and a peripheral region with differently shaped reflecting surfaces. A luminous element is arranged on the optical axis of the reflector. A bend is formed at the transition between the central region and the peripheral region.
A high-beam headlamp for motor vehicles is known from DE-OS 36 09 659. This headlamp has a reflector in the form of a paraboloid of revolution, a luminous element being arranged on its optical axis. The reflector produces a parallel luminous beam with a pronounced maximum in the center of the light distribution, but with less scattering. For the purpose of forming the light distribution desired for the high beam with a high light intensity in the center of the light distribution and a horizontal scattering, a scattering disk is provided which has optical elements which deflect the light beams reflected by the reflector in the required direction at the required intensity. However, a disadvantage of the scattering disk consists in that it cannot be arranged at a sharp inclination as is desired in motor vehicles for achieving low air resistance, since the light beams will otherwise also be deflected vertically by the optical elements in an undesirable manner. Moreover, the scattering disk with the optical elements is costly to produce.
SUMMARY OF THE INVENTION
Accordingly, it is an object of the present invention to provide a headlamp for motor vehicles, which avoids the disadvantages of the prior art.
In keeping with these objects and with others which will become apparent hereinafter, one feature of the present invention resides, briefly stated, in a headlamp of the above mentioned type, in which images of the luminous element are reflected so as to be horizontally scattered by one of the regions, and images of the luminous element are reflected in the center of the light distribution produced by the reflector by the other region.
When the headlamp for motor vehicles is designed in accordance with the present invention, it has the advantage that the desired light distribution is already produced by the reflector with a horizontally scattered luminous beam and a high maximum light intensity in the center of the light distribution so that the light disk need have no optical elements.
In accordance with another feature of the present invention, the central region reflects the image of the luminous element in a scattered manner, and the peripheral region reflects the images of the luminous element in the center of the light distribution.
The reflecting surface of the central region can contain a parabola in section vertically through the center as a section curve, a hyperbola or a curve similar to a hyperbola in the horizontal longitudinal section as section curve, or also an ellipse or a curve similar to an ellipse in the horizontal longitudinal section as section curve. The central region can be divided into two halves meeting in the vertical center plane of the reflector, and the optical axes of the two halves can extend in the horizontal center plane so as to diverge from one another.
Finally, the reflecting surface of the peripheral region can contain parabolas or curves similar to parabolas as section curves in an axial longitudinal section.
The novel features which are considered as characteristic for the invention are set forth in particular in the appended claims. The invention itself, however, both as to its construction and its method of operation, together with additional objects and advantages thereof, will b
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Lazarus Ira S.
Quach Y.
Robert & Bosch GmbH
Striker Michael J.
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