| abstract |
The invention relates to a method for visualizing of the flatness of a container (14) ring (16) surface, consisting: - illuminating the ring surface from above using a peripherally incident light beam comprising radial rays, with specular reflection on the ring surface, - forming, using an optical system (24, 124), a flat image of the ring surface, on a sensor (18), using a geometrical optical transformation which converts an actual height difference (dZ) into a radial image offset (dR) on the image, and the radial image offset (dR) corresponding to a unit actual height difference (dZ) being greater than the radial image offset corresponding to an actual radial offset of the same size. The invention also concerns a device and an apparatus implementing such a method. |