The intensifier tubes use the photoelectric effect. 无源像增强管使用光电效应。
The heart of any device is an intensifier tube that converts scarce photons into electrons and then amplifies and converts them into a visible image. 任何这类装置的核心都有一个增强管,能将极少量的光子转换成电子,然后加以放大并转换成可见的影像。