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.
车长周视指挥镜是可见光、激光、微光三光合一，且有周视指挥能力的多功能光电系统。
Tank commander panoramic sight is a multi-function optoelectronic system in which visible light, laser and low-level light is fused for aiming and ranging.
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