drift of frequency meaning in English

频率漂移

The emphasis was put on the main factors affecting its performance , such as : drift of the average frequency of interferometer ; drift of frequency difference of interferometer ; the changes of the interference add - on term of the gaussian beam during the measurement and its effects on the phase changes , as well as the relationship between the changes of the interference add - on term of the gaussian beam during the measurement with the movement of the measurement mirror
对双频激光干涉仪的工作原理进行了理论分析，着重分析了其主要影响因素：双频激光平均频率漂移；双频激光差频漂移；高斯光束干涉附加项在测量过程中的变化及其对相位变化的影响，与测量镜运动引起的程差变化的关系。