一、前言在实验应力分析中,用全息干涉法得到变形,尤其是得到离面位移信息是很灵敏的,而不易获得面内位移信息。散斑法正相反,它很容易得到面内位移,而离面位移就较难得到。它的灵敏度也低于全息干涉法。在实际工作中,往往遇到既要求面内位移也要求离面位移的问题。为了保证实验精度,又不宜使用分别加载拍片的 I. INTRODUCTION In the analysis of experimental stress, deformation is obtained by holographic interferometry. In particular, the information of out-of-plane displacement is very sensitive, but it is not easy to obtain the in-plane displacement information. Contrary to speckle method, it is easy to get in-plane displacement, while out-of-plane displacement is more difficult to get. Its sensitivity is also lower than holographic interferometry. In actual work, often encounter the problem of requiring both in-plane displacement and out-of-plane displacement. In order to ensure the accuracy of experiments, but also should not be used to load the film