Owner-Petersen M
Appl Opt. 1991 Jul 1;30(19):2730-8. doi: 10.1364/AO.30.002730.
Since shearing interferometry, also called shearography, does not depict fringes caused by object tilt, it is a tool well suited for either nondestructive testing of objects under load or for quantitative evaluation of flexural strains. In traditional shearing interferometry, observation of fringes requires optical processing of doubleexposed interferograms. Hence the technique is not in real time. This paper explores the possibilities and limitations for real time shearing fringe observation using the electronic speckle pattern interferometry technique. Prospects for quantitative determination of local tilt and flexural strain using the phase shifting technique are commented on, and some preliminary results are shown.
由于剪切干涉测量法（也称为剪切电子散斑干涉术）不会描绘由物体倾斜引起的条纹，因此它是一种非常适合对加载状态下的物体进行无损检测或对弯曲应变进行定量评估的工具。在传统的剪切干涉测量法中，观察条纹需要对双曝光干涉图进行光学处理。因此，该技术不是实时的。本文探讨了使用电子散斑图案干涉测量技术进行实时剪切条纹观察的可能性和局限性。对使用相移技术定量确定局部倾斜和弯曲应变的前景进行了评论，并展示了一些初步结果。
