US 12,449,372 B2
Luminaire element for an inspection tunnel, luminaire strip, and inspection tunnel
Dietmar Wieland, Waiblingen (DE); Wolfgang Tobisch, Stuttgart (DE); Andreas Danler, Völs (AT); Daniel Föger, Silz (AT); and Manfred Gstrein, Absam (AT)
Assigned to Dürr Systems AG, Bietigheim-Bissingen (DE)
Appl. No. 17/919,131
Filed by Dürr Systems AG, Bietigheim-Bissingen (DE)
PCT Filed Aug. 20, 2020, PCT No. PCT/DE2020/100727
§ 371(c)(1), (2) Date Oct. 14, 2022,
PCT Pub. No. WO2021/213561, PCT Pub. Date Oct. 28, 2021.
Claims priority of application No. 10 2020 110 722.6 (DE), filed on Apr. 20, 2020.
Prior Publication US 2023/0160833 A1, May 25, 2023
Int. Cl. G01N 21/88 (2006.01); F21V 3/00 (2015.01); F21V 5/02 (2006.01); F21V 5/08 (2006.01); F21V 15/01 (2006.01); F21V 19/00 (2006.01); F21V 23/06 (2006.01); G01N 21/01 (2006.01); F21W 131/101 (2006.01); F21Y 103/10 (2016.01); F21Y 105/00 (2016.01); F21Y 115/10 (2016.01)
CPC G01N 21/8806 (2013.01) [F21V 3/00 (2013.01); F21V 5/02 (2013.01); F21V 5/08 (2013.01); F21V 15/01 (2013.01); F21V 19/005 (2013.01); F21V 23/06 (2013.01); G01N 21/8803 (2013.01); F21W 2131/101 (2013.01); F21Y 2103/10 (2016.08); F21Y 2105/00 (2013.01); F21Y 2115/10 (2016.08); G01N 2021/0112 (2013.01); G01N 2021/8816 (2013.01); G01N 2021/8835 (2013.01); G01N 2021/8845 (2013.01)] 23 Claims
OG exemplary drawing
 
1. A luminaire element for checking glossy surfaces, in particular painted surfaces, the luminaire element comprising at least two stripe-like arrangements of light sources in a luminaire housing, the luminaire housing having at least two edge regions lying opposite one another along a longitudinal extent of the luminaire housing,
wherein first and second stripe-like arrangements of the light sources extend along the longitudinal extent at the opposing edge regions, the first and second stripe-like arrangements separated by a center region having a reflector positioned between the first and second stripe-like arrangements, wherein the separation of the first and second stripe-like arrangements and light reflected from the first and second stripe-like arrangements via the reflector define a luminance profile with a lower radiant intensity in a central region separating first and second radiant intensity peaks, and wherein the luminance profile includes first and second external regions on opposite sides of the radiant intensity peaks, the external region having a lower radiant intensity than the central region.