Patent ID: 6995838

Claim:
Device for the automatic surface inspection of a moving strip ( 1 ), in order to detect surface defects, of the type comprising, on the one hand, at least one camera ( 10 ) whose optical axis is directed towards the surface to be inspected and which forms with said surface a line of sight which is transverse relative to the direction of movement of the strip ( 1 ) and, on the other hand, at least one lighting system ( 15 ) whose incident rays are directed towards the transverse line of sight and are distributed over the entire length of said line, characterised in that the incident rays form, with a perpendicular at the location of each point of the transverse line of sight, an angle β x which varies continuously along the light source, and in that, at the location of each point of the transverse line of sight, the direction of observation of the camera ( 10 ) forms, with the specular reflected ray at said point, a constant angle δ, and, with the perpendicular at the location of each of the points, an angle α x which observes the relationship: βx−αx =δ constant.