利用激光双光束干涉方法测量地球潮及监测地震

Measurement of Tide Variation of the Earth with Laser Double Beam Interference Mathod

本文提出利用激光双光束干涉方法研究地球潮的变化，对其测量原理和测量精度作了分析、讨论。通过对干涉条纹进行调制并计数，在激光波长为０．６３μｍ时，对２５ｍ的测量精度可达１／１００干涉级次（０．００６μｍ）。因此，在隧道中用这个方法可测地球潮。

In this paper,the measurement of tide variation of the earth has been studied by using laser double beam Interference method.We have discussed the measuring principle and precision.The results show that the precision is of 0.006 m at =6 328,length 25 m by modulating and counting of interferogram.So the mathod may be used to measure the tide variation of the earth in tunnel.