So Mr O'Brien has been working on a ceiling-based system that tracks where a receiving device is, and then sends it a signal using several laser beams from a directional transmitter.

所以O'Brien先生一直研究一套基于天花板的系统，用于跟踪接收装置所在位置，利用来自定向传送器的几束激光向该装置发出信号。

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The experimental results show that submicron level plane positioning accuracy can be achieved by the precision positioning device based on laser Moire signal.

实验结果表明，基于激光莫尔信号的精密定位装置可获得亚微米级的平面定位精度。

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Transmitter is the device which changes electrical pulse signal into optical pulse signal, and then transmit the optical signal in wave form by laser diode or light-emitting diode.

光发射机的功能是将电脉冲信号转换成光脉冲信号，并以数字光纤通信系统传输性能所要求的光脉冲信号波形从光源器件的尾纤发射出去。

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In the video, the major appears to be upbraiding the soldier for not using a laser warning device to signal the approaching truck.

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