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采用旋转锥镜相机，进行激光散斑剪切照相，研测缓慢变形物体的动态曲率和斜率。拍摄一张散斑图即可获得曲率和斜率动态变化的全过程。
A rotating cone camera is used to take a laser speckle shear photography to study the dynamic curvature and slope of slowly deforming objects. Take a speckle shot to get the whole process of dynamic changes in curvature and slope.