一、概况在不断发展的光学器件领域中,象增强管已成为把视觉范围向电磁波谱的微光区扩展和实现电视播送光学图象不可缺少的元件。历史上,研制了许多类型的象增强管供各种应用。然而,直到六十年代初,随着有高分辨率屏和高效率多碱阴极的电磁聚焦级联式象增强管的发展,才出现具有足夠微光分辨率的高性 I. Overview In the field of the ever-evolving optics, ele- vators such as booster tubes have become indispensable components for the extension of the visual range to the low light area of ​​the electromagnetic spectrum and for the television broadcast of optical images. Historically, many types of image intensifier tubes have been developed for a variety of applications. However, until the early 1960s, with the development of electromagnetic focusing cascades with high-resolution screens and high-efficiency multi-alkali cathodes, there appeared to be high levels of micro-light resolution