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基於激光泰曼干涉仪，给出了等厚干涉场中某一点光强时间平均值遵循零阶贝塞尔函数变化规律，介绍了谐振微小振幅的测量原理。
Based on the laser Tajman interferometer, the time-averaged light intensity at a certain point in the isometric interference field is given to follow the variation law of the Bessel function of the zeroth order, and the measurement principle of the resonant amplitude is introduced.