image tube photocathode

例句：

1. 1.The image tube is the heart of the television.
   图像管是电视机的核心。
2. 2.The photocathode is responsible for converting light into electrical signals.
   光电阴极负责将光转换为电信号。
3. 3. The image tube was invented by a man named Edwin H. Land.
   图像管是由名叫埃德温·H·兰德的一个人发明的。