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Screenless elliptical illumination module producing an illumination beam with cutoff and lamp comprising such a module
| Details |
Inventors: Albou, Pierre;
Assignee: Valeo Vision (Bobigny, FR)
Primary Examiner: O'Shea; Sandra
Assistant Examiner: Ton; Anabel
Attorney, Agent or Firm: Morgan & Finnegan LLP
The invention proposes an illumination module (10) producing an illumination beam with cutoff, comprising, arranged from back to front along a horizontal optical axis (A—A), an elliptical reflector (12) which delimits a volume of reflection and which has an elliptical surface of reflection (18, 20), at least one light source (14) which is arranged in the vicinity of a first focus (F1) of the reflector (12), and a convergent lens (16) whose focal plane is arranged in the vicinity of the second focus (F2) of the reflector (12), characterized in that the reflector (12) has a horizontal flat surface (22), the upper face (24) of which is reflective, which delimits vertically towards the bottom the volume of reflection, and in that the flat surface (22) of the reflector (12) has a cutoff edge (28) which is arranged in the vicinity of the second focus (F2) of the reflector (12). The invention also proposes a lamp comprising such an illumination module. |
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DETAILED DESCRIPTION What is claimed is: 1.
An illumination module for a motor vehicle lamp producing an illumination beam of the type with cutoff, comprising, arranged from back to front overall along a longitudinal horizontal optical axis (A—A), a reflector of the elliptical type which delimits a volume of reflection for light rays and which has a substantially elliptical surface of reflection, at least one light source which is arranged in the vicinity of a first focus of the reflector, and a convergent lens whose focal plane is arranged in the vicinity of the second focus of the reflector, the reflector having a horizontal flat surface of reflection with an upper face which is reflective, which delimits vertically towards the bottom the volume of reflection, the flat surface of the reflector having a front end edge, referred to as the cutoff edge, which is arranged in the vicinity of the second focus of the reflector, so as to form the cutoff in the illumination beam, the flat surface of the reflector being arranged in a horizontal plane passing overall through the focus of the reflector, wherein the flat surface of the reflector extends longitudinally towards the rear, from its cutoff edge, at least as far as the vicinity of the first focus of the reflector.
2.
An illumination module according to claim 1, wherein the substantially elliptical surface of the reflector is formed by an angular sector of a component substantially generated by revolution about the longitudinal optical axis (A—A), and wherein this angular sector extends vertically above the flat surface of the reflector.
3.
An illumination module according to claim 2, wherein the reflector is produced as a single solid component of transparent material.
4.
An illumination module according to claim 3, wherein the lens is produced as a single component with the reflector.
5.
An illumination module according to claim 3, wherein the light source is arranged in a complementary cavity produced in the flat surface of the reflector
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Lighting 
