Abstract: The invention is concerned with a device for determining an intensity and/or color and/or sharpness profile in each case of an optical lens system (3), which projects a test pattern (1) consisting of measuring fields (5), wherein the projection is directed indirectly or directly in each case toward a sensor area (6) of electronic color and brightness sensors of high resolution, whose measured signals, which are correlated to the measuring fields (5), are sent to a computer (60), which determines from these the intensity and/or color and/or sharpness profile and/or distortion propagation profile, outputs them to an image processing system (62) for an electronic image flaw correction of images (B) that were generated by an identical lens system (3), and stores them or temporarily stores them on a data carrier (61).