Abstract: An optical pick-up device for image processing systems has an objective for generating an optical image of a subject to be registered, an image-to-signal transducer, particularly a CCD camera that converts the optical image into a video signal and an illumination device for illumination of the subject to be registered in incident light. The rugged and high-performance illumination device, that yields an optimum light distribution in the plane of registration, has a plurality of infrared diodes that are arranged with equal spacing on at least one circle coaxial with the optical axis of the objective. It also has at least one annular deflection device that is similarly arranged coaxial with the optical axis. This deflection device concentrates the light emitted by the infrared diodes obliquely onto the subject from all sides.

Abstract: Method and apparatus for automatically adjusting the focus of cathode ray tubes which can be utilized with cathode ray tubes used as monitors or for television sets that are operated with different field frequencies and different number of scan lines. A specific image such as a fine checkerboard pattern or a fine line pattern is produced on the monitor which is to be adjusted and the image is then picked up with a solid state camera; the image magnification and resolution are selected such that the fine pattern is acquired with full resolution in the camera signal. The camera signal is evaluated using a known image processing system and the image focus of the image acquired by the camera is calculated by using histogram calculations. The width of the histogram curve is a measure of the image focus and the image focus is either manually or automatically adjusted.