Fig. 1. Residual stress distribution characteristics around laser damage point. (a) Two principal stress axes; (b) birefringence distribution of numerical slices along z-axis

Fig. 2. Experimental setup for measuring residual stress of laser-induced damage

Fig. 3. Interference patterns, reflected light intensity and shear stress at different depths. (a) 30 μm; (b) 50 μm; (c) 60 μm; (d) 70 μm; (e) 100 μm; (f) 110 μm

Fig. 4. Three-dimensional graphs and average stress distribution of residual stress before and after repair. (a) Three-dimensional diagram of residual stress before repair; (b) three-dimensional diagram of residual stress after repair; (c) average stress distribution along depth; (d) average stress distribution along radial direction

Fig. 5. Axial resolution measurement results of experimental setup. (a) Average intensity change curve of corresponding points at different depths along axis; (b) intensity image reconstructed every 1 μm