在两个反射镜上安装光电探测器，使之转一周产生一个脉冲信号作为基准信号。

Fixed photoelectric detectors on the two reflectors, they produce a pulse signal as reference signal every round.

youdao

在两个反射镜上安装光电探测器，使之转一周产生一个脉冲信号作为基准信号。

Fixed photoelectric detectors on the two reflectors, they produce a pulse signal as reference signal every round.

youdao