Patent ID: 9482401
Filing Date: 2016-11-01
CPC Classification: F21S

Claim Text:
1. A vehicular illumination lamp comprising: a projection lens configured to output forward, as light that is parallel with an axial line extending in a lamp front-rear direction, light emitted from a prescribed point on the axial line; and a light source disposed in the rear of the projection lens, wherein a front surface of the projection lens is a convex free surface and a perimeter of the front surface extends approximately along a plane that is perpendicular to the axial line; and a rear surface of the projection lens is a curved surface which is formed so that light emitted from the prescribed point and incident on the projection lens is output from the projection lens as light that is parallel with the axial line, wherein the perimeter of the front surface of the projection lens forms a non-circular shape having a plurality of straight portions and one or more front corner portions located between the straight portions, and a perimeter of the rear surface is formed having portions corresponding to the respective straight portions which are deviated in a direction away from the perimeter of the front surface, and rear corner portions corresponding to the front corner portions which are deviated in a direction toward the perimeter of the front surface.