Surface or inside fault detection unit for transparent or reflecting object

摘要

The unit includes a light source (1), a partially reflecting plane surface (2), and a retroreflecting surface (4). Also provided is an automatic working unit for detecting faults. The The source illuminates the object (3) via the partially reflecting plane surface and the optionally shaped retroreflecting surface. A telecentric or approximately telecentric optic selectively illuminates and images the object. The automatic working unit receives images of the object via a pupil part (6) of the system. The aperture of the imaging optic is set by the adjusting of the orifice. The image pick-up (7), e.g. a TV camera, receives the image and this is evaluated by an evaluating unit.