本文讨论了法一珀干涉仪的灵敏度,表明在每个条纹中有两个最灵敏点。在最灵敏点和峰值处,周相差变化同为△δ时的光强变化之比为±2φ_(max)/△δ。叙述了一个用一作为参考的法-珀标准具,在最灵敏点的光强引起的输出电压抵消作为测量用的法-珀干涉仪在最灵敏点时的光强引起的输出电压的补偿方法,能仅将偏离最灵敏点时引起的电压差值予以放大,以提高测量的精确度。 This article discusses the sensitivity of the F-I interferometer, which shows that there are two most sensitive points in each fringe. At the most sensitive points and peaks, the ratio of the change of light intensity at the same period of variation to that at the same period is ± 2φ max / △ δ. Describes a method using a reference - Pei etalon, the light intensity at the most sensitive point of the output voltage offset due to the measurement method - Perot interferometer at the most sensitive point of the light intensity caused by the output voltage compensation method , Can only deviate from the most sensitive point voltage difference caused by amplification, in order to improve the measurement accuracy.