PLURAL BEAM CATHODE RAY TUBE HAVING BOUNDARY-SHAPED CYLINDRICAL ELECTRODES CORRECTING BEAM ABERRATION

摘要

A cathode ray tube comprising an electron gun for producing a plurality of beams located in a flat plane passing through the axis of the electron gun. The electron gun system comprises at least two cylindrical electrodes arranged in consecutive order and surrounding the beams. The ends of the two electrodes confronting each other are shaped to provide an aberration reducing electrostatic field for those electron beams that do not coincide with the axes of the two electrodes.