Method and device for the detection of surface defects on the outer wall of a transparent or translucent object

Device for detecting surface defects on the outer wall (2) of a transparent or translucent object (3), characterized in that it comprises:

• a uniform, extensive, broad light source (4), adapted to send an incident light beam (5) onto a surface of the outer wall (2) of the object,
• a linear sensor (8) to measure light beams, arranged to collect the light beam (9) reflected by a linear zone (Z) of the outer wall (2), illuminated by the light source (4),
• means (12) ensuring relative movement between firstly the object and secondly the light source (4) and the linear measuring sensor (8), so as to move the linear measuring zone (Z) over the outer wall (2) of the object to cover the surface to be inspected,
• and a unit (15) for a analysing and processing the light beams received by the measuring sensor (8), adapted to create an image (I) and to identify, within the image, the presence of a surface defect corresponding to a dark area (s).