| 摘要 |
PURPOSE:To shorten a process time without any effect on the performance of a camera tube and thereby aim at a distinct improvement in productivity, by removing or omitting an acute point part of an electrode in a deflectron section circumferential direction at the specific length to a theoretical pattern. CONSTITUTION:An electrolytic decision contributory ratio in a deflecting electrode is in proportion to not only a distance from an electrode to a field forming range but also an electrode area. The theory of a deflectron rests on this authority through which cos potential distribution to a circumferential surface required for forming a uniform deflecting field makes the area of a sheet of a metal electrode so as to give the cos distribution to the circumferential direction. An acute point part, which substantially does not disturb the uniform deflecting field, is removed or omitted within the limits of 25% at one side in the electrode length in the circumferential direction. With this, productivity can be improved without entaling any pattern distortion in a camera tube and any influence on its performance centering on the resolution. |
