Registration marks detecting device for multicolor printing area, has camera, evaluation unit and light diodes arranged on common printed circuit board, and illumination device exhibiting aspherical lenses for imaging light of diodes

摘要

The device has a camera (9), an evaluation unit, an illumination device exhibiting light diodes (18, 19) and aspherical lenses (24, 25) for reproducing the light of the light diodes. The camera, the evaluation unit and the light diodes are arranged on a common printed circuit board (17). The light diodes are coupled with light integrators (21, 22), which homogenize the light emitted from the light diodes. The light integrators extend between the light diodes and aspherical lenses. The light integrators are provided in slots in a plastic plate.