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Lens system for an X-ray machine, has structured lens groups with at least one aspherical surface to give compensation for image faults at the image amplifier
Lens system for an X-ray machine, has structured lens groups with at least one aspherical surface to give compensation for image faults at the image amplifier
The lens system, for an X-ray machine, takes up to 5% of the image in an image amplifier phosphor layer (15) and preferably to infinity. A further following lens forms the image at a camera. The lens has a barrel-shaped distortion in infinity which compensates for the cushion distortion at the camera. The lens has at least one aspherical surface (10) to correct image faults on a given distortion. The physical diaphragm is after the final surface of the lens, in the radiation direction.
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