一、前言当两束直线偏振光干涉时,如偏振方向相同,则干涉效应最强;如相互垂直,则没有干涉现象。因此,当偏振方向随时间而变化的两束光进行干涉时,干涉输出不定,所以定量的干涉测量是不可能的。基于这个原因,使用光 I. Introduction When two linearly polarized light interfere with each other, if the polarization direction is the same, the interference effect is strongest; if they are perpendicular to each other, there is no interference phenomenon. Therefore, when the two beams whose polarization direction varies with time interfere with each other, the interference output is indefinite, so quantitative interferometry is impossible. For this reason, light is used