Abstract: A lamp for vehicle that includes a light source, a housing, a reflector and a lens is disclosed. The lens is made by the process that includes 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 consisting of a convex surface, a concave surface or a combination of both surfaces, so that the cross hatching pattern is deformed into a process surface, and (c) processing a lens cut in accordance with the cross hatching pattern when the process surface is orthographically projected onto the lens surface. 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. The lens cut may have curvatures of the same diffusion coefficient regardless of the pitch of the cross hatching pattern.

Abstract: A vehicle lamp having inner and outer lenses and a reflector mirror surface. The inner lens is a Fresnel lens for converting light beams from a light source into parallel light beams, and the outer lens is an ordinary lens for obtaining a desired divergence property of the lamp. The reflector mirror may be a plane mirror, a mirror of a truncated cone shape, or a mirror of a parabolic cylinder shape. The Fresnel lens has as its focal point the virtual image of the light source as obtained by the reflector mirror, thus realizing a compact and small depth housing of the lamp while effectively using the light beams.