Contour Measurement of Object with Arbitrary Surface Using Two-Dimensional Shearography with Source Displacement

A two-dimensional (2D) shearography with source displacement is proposed to measure object contours. Using a dual-shear shearographic setup two movable laser sources, the full-field slopes along pair of orthogonal shear directions were obtained. The contour was then obtained by performing 2D integration surface slopes. Theoretical derivations and experimental results are presented demonstrate performance method. show that objects various types surfaces, such as spherical hyperbolic paraboloid can be effectively measured. measurement aids in precision strain location defects.