Patent ID: 6269660
Filing Date: 2001-08-07
Classification: F21S,Y10S

Abstract:
A lamp for a vehicle comprising a light source, a housing, a reflector and a lens, wherein the lens is made by the process comprising the steps of:(a) assuming an imaginary plane with a cross-hatching pattern made of crossing groups of plural lines disposed in parallel at a constant pitch;(b) deforming the imaginary plane by a desired shape including a convex surface, a concave surface or a combination of both surfaces, so that the cross hatching pattern is deformed into a process surface;(c) orthographically projecting the process surface onto the lens surface; and(d) processing a lens cut in accordance with the cross hatching pattern when the process surface is orthographically projected onto the lens surface, wherein the deformation given to the imaginary plane is performed so that the maximum pitch of the cross hatching pattern orthographically projected onto the lens surface is 1.5 times or more and 20 times or less the minimum pitch.