Devices for detecting painting defects on at least one painted surface to be inspected

A device for detecting painting defects on at least one painted surface to be inspected, the device comprising:

• a source configured to emit electromagnetic radiation, in at least one first spectral band, in order to project a beam of the electromagnetic radiation onto the at least one painted surface to be inspected;
• a video camera sensitive in at least one second spectral band and configured to obtain images of the at least one painted surface to be inspected in a zone where the beam of the electromagnetic radiation emitted by the source is projected;
• a diffuser configured to intercept at least part of the electromagnetic radiation emitted by the source and to make more homogeneous a spatial distribution of intensity of the electromagnetic radiation over the at least one painted surface to be inspected;
• and
• an intensity alternator configured to intercept, after the diffuser, the electromagnetic radiation emitted by the source and to generate, on the at least one painted surface to be inspected, a spatial arrangement of the electromagnetic radiation comprising high-intensity electromagnetic radiation zones alternating with low-intensity electromagnetic radiation zones;
• wherein a spectral working band of the device is the at least one first spectral band if the at least one first spectral band is entirely contained within the at least one second spectral band, wherein the spectral working band of the device is the at least one second spectral band if the at least one second spectral band is entirely contained within the at least one first spectral band, and wherein the spectral working band of the device is an intersection of the at least one first spectral band and the at least one second spectral band if the at least one first spectral band overlaps the at least one second spectral band,
• wherein the spectral working band has a bandwidth less than or equal to 200 nanometers (nm), and
• wherein the spectral working band is comprised between 300 nm and 1,100 nm.