An X-ray image intensifier (5a) possesses an electrode system for focusing onto the output fluorescent screen (7) of the X-ray intensifier (5a) the electrons generated during infringement of the X-ray radiation on the input fluorescent screen (4) of the X-ray image intensifier (5a). Said electrode system is to be simplified, the number of electrodes being reduced and the imaging characteristics being improved. …??According to the invention, the object is achieved when one electrode of the electron optics composed of electrically resistant material is applied as a coating (15) on a one-piece electrode carrier (14a) forming the jacket of the vacuum vessel, and a voltage is applied to the coating (15), so that the potential field rises continuously in the region from the input fluorescent screen (4) to the output fluorescent screen (7). …IMAGE…
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