US 12,313,235 B2
Fresnel projection lens with integrated function for satisfying overhead sign values
Carmen Bungenstock, Kleinenberg (DE); Mathias Drueppel, Lippstadt (DE); Gerhard Kloos, Erwitte (DE); Philip Stroop, Schloss Holte-Stukenbrock (DE); and Benjamin Willeke, Paderborn (DE)
Assigned to Hella GmbH & Co. KGaA, Lippstadt (DE)
Filed by HELLA GmbH & Co. KGaA, Lippstadt (DE)
Filed on Oct. 11, 2023, as Appl. No. 18/378,944.
Claims priority of application No. 10 2022 126 304.5 (DE), filed on Oct. 11, 2022.
Prior Publication US 2024/0117949 A1, Apr. 11, 2024
Int. Cl. F21S 41/275 (2018.01); F21S 41/20 (2018.01); F21V 5/04 (2006.01)
CPC F21S 41/275 (2018.01) [F21S 41/285 (2018.01); F21V 5/045 (2013.01)] 15 Claims
OG exemplary drawing
 
1. A Fresnel projection lens for a headlight of a motor vehicle, the Fresnel projection lens comprising:
a light entry surface having a smooth or substantially smooth surface;
a light exit surface having a plurality of adjacent annular flanks, wherein each flank comprises a bottom, an effective facet, and an interfering facet located at a first pitch angle to the effective facet, the effective facet and the interfering facet forming a cut edge opposite the bottom,
wherein at least one of the flanks is truncated to provide a pass through area, the pass through area being a facet that is opposite the bottom and extends from the effective facet to the interfering facet, such that the pass through area is angled to the effective facet and angled to the interfering facet.