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1.绪言最近广播用的摄象管进一步向图象高质量的方向发展,在研究光电导膜的同时,包括电子枪的聚焦、偏转系统的研究开发也很活跃。在广播用摄象管的诸特性中,分辨力与惰性是二个基本而重要的性能。有关电子枪的研究也主要着眼于这二个特性的改善。由于摄象管的分辨力是由光电导膜的特性与扫描电子束的直径来决定的,所以人们对形成微细电子束进行了研究,过去一直使用着形成锐利交叉点的三极管枪。但是由
1. INTRODUCTION Recently, the video tube used for broadcasting has been further developed in the direction of high image quality. In the meantime, the research and development of focusing and deflecting systems including electron guns has also been very active while studying photoconductive films. Among the features of broadcast video cameras, resolution and inertia are two basic and important features. The research on electron guns mainly focuses on the improvement of these two characteristics. Since the resolving power of the image tube is determined by the characteristics of the photoconductive film and the diameter of the scanning electron beam, a study has been conducted on the formation of a fine electron beam. In the past, a triode gun for forming a sharp intersection was used. But by