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.
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。
3
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.