Patent ID: 7281830

Claim:
A vehicle headlamp comprising: a lamp unit having an optical axis extending in a longitudinal direction of a vehicle, the lamp unit including: a projection lens arranged on the optical axis; a light source arranged behind a rear focus point of the projection lens; and a reflector that reflects light from the light source in a forward direction close to the optical axis, wherein the projection lens comprises a toroidal lens having an arcuate profile, wherein the arcuate profile has a central axis on a plumb line passing through a predetermined point on the optical axis behind the projection lens, vertical cross sections of the toroidal lens have the same shape, and the respective vertical cross sections are provided on vertical planes that extend through the toroidal lens and include the plumb line; vertical cross section profiles of the rear surface of the toroidal lens are configured by rearward tilted straight lines, and vertical cross section profiles of the front surface of the toroidal lens are configured by convex curved lines formed so as to position the rear focus point of the projection lens on the optical axis.