1.前言近几年来,以家用单管彩色摄象机与广播用三管彩色摄象机领域为中心,所使用的摄象管已向小型化和高性能的方向迈进,结构部分也取得了进展。单管方式所用的靶面结构取得了显著的发展。另一方面,在广播领域内以扫描电子枪的研制为主流,同时研究层流型电子枪、 1. Foreword In recent years, with the single tube color video camera and the three-tube color video camera for broadcasting as the center, the video tube used has been miniaturized and high-performance, and the structure has also been made progress. The single-tube method used in the target surface structure has made significant progress. On the other hand, the development of scanning electron guns in the field of broadcasting is the mainstream. At the same time, it studies laminar electron gun,