Vehicle lamp lens having Fresnel lens

Details Vehicle lamp lens having Fresnel lens Vehicle lamp lens having Fresnel lens

1989-04-07

1990-05-22

Arnold, Bruce Y.

G02B 308

Patent

active

049272489

ABSTRACT:
A lens adapted for use in vehicular lighting employs a Fresnel configuration despite the fact that the lens has no axis of revolution and is formed as a quadric surface to meet vehicle design needs. The basic lens design is obtained by orthographically projecting a planar Fresnel pattern onto the quadric surface. The surfaces of the Fresnel steps are formed so that light emanating from a rear focus is converted into substantially parallel beams by reflection/reflection through the lens. The surfaces may have continuously or incrementally varying angulation, and may be formed by cutting using a 3 or 5 axis milling cutter.

REFERENCES:
patent: 1944154 (1934-01-01), Dickson
patent: 2762912 (1956-09-01), Onksen et al.
patent: 3204093 (1965-08-01), Heenan
patent: 3883733 (1975-05-01), Nagel

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