US 12,072,301 B2
Inspection system for inspecting a lighting device during an assembly process of the lighting device and a method thereof
Marc Andre De Samber, Lommel (BE); and Philip Steven Newton, Waalre (NL)
Assigned to SIGNIFY HOLDING B.V., Eindhoven (NL)
Appl. No. 17/800,325
Filed by SIGNIFY HOLDING B.V., Eindhoven (NL)
PCT Filed Feb. 15, 2021, PCT No. PCT/EP2021/053582
§ 371(c)(1), (2) Date Aug. 17, 2022,
PCT Pub. No. WO2021/165175, PCT Pub. Date Aug. 26, 2021.
Claims priority of application No. 20158494 (EP), filed on Feb. 20, 2020.
Prior Publication US 2023/0063672 A1, Mar. 2, 2023
Int. Cl. G01N 21/956 (2006.01)
CPC G01N 21/956 (2013.01) 15 Claims
OG exemplary drawing
 
1. An inspection system for inspecting a lighting device during an assembly process of the lighting device, the lighting device having a base plate and a plurality of components mounted on the base plate, the inspection system comprises:
a light source arranged for illuminating the lighting device according to a first light output spectrum for providing a luminance contrast between the base plate and the plurality of components;
an imaging unit arranged for capturing a first image of the illuminated lighting device;
a controller comprising a processing unit for determining a luminance contrast measure of the captured first image, the processing unit further configured to adapt the first light output spectrum when the luminance contrast measure of the captured first image exceeds a threshold value, and the imaging unit further arranged for capturing a second image of the lighting device illuminated according to the adapted first light output spectrum,
the controller further comprising
a comparing unit arranged for comparing the second image with a reference image; and
a determination unit arranged for determining a defect in the base plate and/or in the plurality of components based on the comparison.