Lamp with stepped reflector surface containing vertical ribs
AssigneeCibie Projecteurs
InventorHector Fratty
Life of this patent
Estimating the term…
Abstract
In a motor vehicle headlamp or the like, the required distribution of the light rays is achieved entirely by selecting an appropriate configuration for the reflector; the front glass is a plain glass having smooth front and rear surfaces. The reflector surface is, as far as possible, a plain paraboloidal surface, but is provided with elongate ribs in selected zones, to produce a spreading of the light rays reflected from these ribs; the light is spread transversely to the length of the ribs. The reflector surface also has offset portions which, like the basic reflector shape, are paraboloidal, but have their focus or foci displaced from the focus of the basic reflector shape.
Claims12
A motor vehicle headlamp, comprising:
- a generally parabolic reflector having a generally concave reflecting surface, the general shape of the reflector having a focus,
- a lens in front of the reflecting surface and cooperating with the reflector to define an enclosure, and
- a light source within the enclosure for emitting light which is directed in a generally forward direction by the reflecting surface,
- the reflecting surface of the reflector having a modified portion which is of generally parabolic shape, the focus of the modified portion being spaced from the focus of the general shape of the reflector, and
- the modified portion of the reflecting surface having a generally vertical reflecting rib, the transverse cross-sectional shape of the rib being convex.
Dependencies are inferred from the claim text.