用统计光学原理分析了错位散斑条纹的形成机理，并把相移技术引入错位散斑之中，使该方法不仅具备非接触、高精度和全场实时观测等特点，而且也实现了双材料界面粘接质量的定量无损检测
The behavior of the digital shearing speckle fringe formation was discussed systematically with the theory of statistical optics. Quantitative NDT of bimaterial interface defects was achieved by using the phase-shifting shearing speckle interferometry system with non-contact, high accuracy, full-field and real-time.
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