本文讲述了双相关激光散斑干涉测量位移、应变的方法。提出了“开关云纹”的概念,分析了该法的优缺点,进行了实验验证,得到了满意的结果。 This article describes the method of double correlation laser speckle interferometry to measure displacement and strain. The concept of “switch moiré” was put forward. The advantages and disadvantages of this method were analyzed, and the experimental verification was carried out. The satisfactory results were obtained.