PROCESS AND APPARATUS FOR THE OPTICAL INSPECTION OF A TRANSPARENT REGION OF A CONTAINER, IN PARTICULAR THE MOUTH REGION

摘要

To photograph the mouth region (2) of a bottle (1), a light-emitting surface (3) is arranged below the mouth region to be photographed. The light-emitting surface (3) is illuminated by means of an illuminating device (4) and the image of the illuminated mouth region (2) is directed to a camera by a mirror arrangement (5,6,11). The light-emitting surface makes it possible to image the mouth region in transmitted light, facilitating detection of defects and soiling in the mouth region from the interpretation of the image recorded by the camera.