The intensifier tubes use the photoelectric effect. 無源像增強管使用光電效應。
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. 任何這類裝置的核心都有一個增強管,能將極少量的光子轉換成電子,然後加以放大並轉換成可見的影像。