Patent ID: 7332853
Filing Date: 2008-02-19
Classification: F21V,H01J,H01K

Abstract:
1. A lamp-reflector unit comprising: a reflector with a neck, a light emission window, a reflecting portion arranged around an optical axis extending through the neck and perpendicular to the light emission window, which reflecting portion extends from the neck up to the light emission window; a lamp comprising, a first light source, and a second light source, said first and second light sources being located one behind the other, axially on the optical axis such that the first light source is located closer to the neck than the second light source; a lamp cap mounted to the neck and provided with electrical contacts and with current conductors connected to the latter and to the respective light sources, characterized in that the reflecting portion is formed in accordance with a body of revolution about the optical axis of a curve which, seen in a longitudinal sectional view of the reflector through the optical axis, extends between a starting point on the neck and an end point on the light emission window, such that by means of auxiliary functions of: a straight line section with n line points extending between the starting point and the end point; a line section of a parabola with n parabola points extending between the starting point and the end point, having a parabola axis coinciding with the optical axis and having a focus F on the optical axis; each individual point K