US 9,810,390 B2
Optical surface and lighting device for vehicles
Susanne Hagedorn, Lippstadt (DE); Andreas Stockfisch, Lippstadt (DE); and Klaus Streich-Schulz, Lippstadt (DE)
Assigned to Hella KGaA Hueck & Co., Lippstadt (DE)
Appl. No. 14/420,882
Filed by Hella KGaA Hueck & Co., Lippstadt (DE)
PCT Filed Aug. 14, 2013, PCT No. PCT/EP2013/066980
§ 371(c)(1), (2) Date Feb. 10, 2015,
PCT Pub. No. WO2014/027020, PCT Pub. Date Feb. 20, 2014.
Claims priority of application No. 10 2012 107 427 (DE), filed on Aug. 14, 2012.
Prior Publication US 2015/0219299 A1, Aug. 6, 2015
Int. Cl. F21S 8/10 (2006.01); F21V 13/04 (2006.01); F21V 5/00 (2015.01)
CPC F21S 48/125 (2013.01) [F21S 48/1283 (2013.01); F21V 5/004 (2013.01); F21V 13/04 (2013.01)] 9 Claims
OG exemplary drawing
 
1. An optical surface for softening a light/dark border of a lighting device for vehicles comprising:
a grid of lens elements distributed over a base surface, by means of which a light bundle passing through the optical surface can be diffused in relation to a main direction,
wherein the lens elements are each designed as micro-lens elements, which have a central main emission surface following a contour of the base surface, by means of which light beams of the light bundle are deflected in a manner corresponding to the contour of the base surface in the main direction, and which has a subsidiary emission surface outwardly projecting from the base surface running at an angle to the central main emission surface, by means of which light beams of the light bundle are diffused in relation to the main direction in a diffusion direction,
wherein the micro-lens elements are each designed in the shape of a dish at the central main emission surface, and
wherein the central main emission surface of each micro-lens element is flat.