| 摘要 |
In a color picture tube, a main lens of an electron gun is formed by a focus electrode to which a focus voltage, is applied an intermediate electrode to which an intermediate voltage between the focus voltage is applied and an anode voltage, and an anode electrode to which the anode voltage is applied. The focus electrode and the anode electrode are cylindrical, and plate electrodes are secured to the inner walls of the respective focus and anode electrodes, and the intermediate electrode has a construction in which a middle plate electrode is sandwiched between two cylindrical electrodes. Accordingly, it is possible to provide an electron gun which is easy to manufacture and has a superior focus performance and is reduced in performance variability.
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