Elliptical lamp unit for an automobile with means for spreading part of the light beam towards the exterior of the lamp unit

摘要

The vehicle lamp unit has a reflector (2) having at least a part forming an ellipsoidal surface. The surface defines an optical axis and possesses an internal focal point (4) and an external focal point (6). Alight source (8) is placed sensibly at the internal focal point (4) and a convex lens (12) has its focal point placed so as to coincide with the external focal point of the ellipsoidal surface. An internal face (14) receives light emitted by the source (8) and an external face (16) emits the light received towards the exterior of the lamp unit. A mask (20) is inserted between the light source and the convex lens (12). The lens (12) has a cutout (22) situated at least in part on the optical axis (X-X). The mark is formed on the internal face (14) of the lens (12) and has the shape of a spherical or a-spherical skull cap