Patent ID: 9316374
Filing Date: 2016-04-19
CPC Classification: B60Q,F21S,G02B

Claim Text:
1. A vehicle headlight to be installed in a vehicle body, the vehicle headlight comprising: a reflector having a spheroidal reflecting surface with a reflector optical axis and a first focus and a second focus through which the reflector optical axis passes, the spheroidal reflecting surface having an elliptical cross section containing the reflector optical axis and the first focus and the second focus and having an eccentricity designed to gradually increase from a vertical cross section thereof to a horizontal cross section thereof; a rotationally asymmetric projection lens having a light emitting surface on a front side and a light incident surface on a rear side and a focus close to the light incident surface, the projection lens being disposed in front of the reflector with the focus disposed substantially at the second focus; and a light source disposed substantially at the first focus, the light source configured to emit light that is reflected by the reflecting surface, incident on the light incident surface to enter the projection lens, and projected through the light emitting surface of the projection lens, wherein the projection lens has an optical axis passing through the focus of the projection lens and extending in a front-to-rear direction of the vehicle headlight and being not coincident with the reflector optical axis, and the light emitting surface of the projection lens is a free curved surface being convex forward, and to have a first horizontal front end and a second horizontal front end farther from a center of the vehicle body than the first horizontal front end, the first horizontal front end being positioned forward of the second horizontal front end, the light incident surface is a free curved surface being convex toward the light source when viewed in a horizontal cross section of the light emission surface and a vertical cross section thereof, in which, when a plurality of light beams in parallel to the optical axis of the projection lens are incident on the light emitting surface to enter thereinside, the plurality of light beams exiting through the light incident surface are focused at the focus of the projection lens, the reflecting surface is disposed such that the reflector optical axis of the reflecting surface is inclined with respect to the optical axis of the projection lens by a predetermined angle so that light emitted from the light source and projected forward through the light emitting surface of the projection lens is made uniform with respect to the optical axis of the projection lens.