photocell pickoff

例句：

1. 1.The photocell pickoff is used to detect light signals from the environment.
   光电管拾音器用于检测环境中的光信号。
2. 2.The photocell pickoff is an essential component of the communication system.
   光电管拾音器是通信系统的重要组成部分。
3. 3. The photocell pickoff is used to convert electrical signals into optical signals.
   光电管拾音器用于将电信号转换为光信号。