Patent ID: 7524095

Claim:
A headlight for a motor vehicle, comprising: a light source; a mirror; and a transparent optical deflection element disposed in front of the mirror and receiving light flux transmitted directly from the light source and light flux reflected by the mirror, the mirror cooperating with the light source to generate a light beam delimited by an upper cut-off line, and the deflection element providing a generally horizontal spread of the light beam without substantially modifying the vertical distribution of the light beam, the deflection element having a light input face and a light output face which extend substantially across the entire span of the deflection element, wherein one of the faces comprises a flat surface orthogonal to the optical axis of the headlight and the other face comprises a continuous, smooth horizontal directing curvalinear surface so as to present an appearance similar to that of a lens of an elliptical type headlight, and wherein the deflection element has a horizontal cross section satisfying a predetermined law expressing a horizontal angular deflection of the light, from an optical axis of the headlight, of a ray reflected by the mirror, as a function of a first lateral distance, from this same optical axis, of the location of reflection of the reflected ray on the horizontal generatrix.