US 12,416,391 B2
Collimator and portable lighting device
Oliver Dross, Hilden (DE)
Assigned to LEDLENSER GMBH & CO. KG, Solingen (DE)
Appl. No. 18/277,611
Filed by LEDLENSER GMBH & CO. KG, Solingen (DE)
PCT Filed Mar. 15, 2022, PCT No. PCT/DE2022/100203
§ 371(c)(1), (2) Date Aug. 17, 2023,
PCT Pub. No. WO2022/214127, PCT Pub. Date Oct. 13, 2022.
Claims priority of application No. 10 2021 108 747.3 (DE), filed on Apr. 8, 2021.
Prior Publication US 2024/0125454 A1, Apr. 18, 2024
Int. Cl. F21V 5/00 (2018.01); F21L 4/00 (2006.01); F21S 41/32 (2018.01); F21S 43/31 (2018.01); F21S 43/40 (2018.01); F21V 7/00 (2006.01); G02B 3/00 (2006.01); G02B 27/30 (2006.01)
CPC F21V 5/004 (2013.01) [F21L 4/005 (2013.01); F21V 7/0091 (2013.01); G02B 3/0037 (2013.01); G02B 27/30 (2013.01); F21S 41/322 (2018.01); F21S 43/315 (2018.01); F21S 43/40 (2018.01); F21S 43/402 (2024.05); F21V 5/002 (2013.01); F21V 5/005 (2013.01)] 22 Claims
OG exemplary drawing
 
22. A collimator for collimating light by means of a plurality of optical surfaces each forming optical boundary surfaces with a change in optical density, the collimator comprising:
only one light entry surface, the only one light entry surface being completely flat;
a convex light exit surface; and
a totally reflective side wall connecting the only one light entry surface to the light exit surface, wherein the light exit surface comprises light-refracting structures, wherein the light-refracting structures are configured as concave and/or convex microlenses;
the side wall is adapted to have an imaginary tangential extension of the side wall intersect the light exit surface, so that a positive angle is formed between the imaginary tangential extension of the side wall and a direct linear connection of edges of the light exit surface and the side wall.