Patent ID: 7753574

Claim:
An optical module for an elliptical motor vehicle lighting device, said optical module comprising: a reflector, a light source emitting light rays, and a projection lens, said reflector having a reflecting internal face for reflecting towards said projection lens at least some of said light rays emitted by said light source, wherein said reflecting internal face of said reflector is formed by the joining of at least a first portion of a first ellipsoid shape and a second portion of a second ellipsoid shape, said first ellipsoid shape having a first principal focus and a second principal focus, said second ellipsoid shape having a first principal focus and a second principal focus, said second principal focus of said first ellipsoid shape being merged with said first principal focus of said second ellipsoid shape, said second portion of an ellipsoid shape thus allowing reflection towards said projection lens of some of said light rays emitted by said light source and reflected by said first portion of the ellipsoid shape; wherein said second principal focus of said second ellipsoid shape and said first principal focus of said first ellipsoid shape constitute principal foci of a third portion of ellipsoid shape which contributes to formation of said reflecting internal face of said reflector; wherein said third portion of ellipsoid shape contributing to formation of said reflecting internal face of said reflector is disposed between said first portion of ellipsoid shape and said second portion of ellipsoid shape; the main function of said first portion of ellipsoid shape is to recover a maximum amount of light flux emitted by said light source; the main function of said second portion of ellipsoid shape is to provide a satisfactory range for a light beam produced by said optical module; and the main function of said third portion of ellipsoid shape is to provide a spread of said light beam produced by said optical module.