Three-dimensional deformation measurement based on digital speckle pattern interferometry

Three-dimensional deformation can be converted into stress-strain distribution, which is the key parameter in material performance test and structure reliability analysis. Among many three-dimensional deformation measurement techniques, digital speckle pattern interferometry can measure the three-dimensional deformation information with high precision. And it plays a very important role in the industries of aerospace, automotive, advanced equipment manufacturing, civil engineering, biomedicine and so on. Based on the basic principle of speckle pattern interferometry, several kinds of three-dimensional deformation speckle pattern interferometry were introduced in detail and their advantages as well as disadvantages were analyzed and compared; at the same time, the research progress and latest application of three-dimensional deformation speckle pattern interferometry at home and abroad were introduced; at last, the development trend of three-dimensional deformation speckle pattern interferometry in dynamic synchronous measurement, measurement system simplification and application range broadening was prospected.