Fig. 1. Schematic of mirror-assisted binocular DIC system.(a) Left camera view; (b) right camera view

Fig. 2. Mathematical model of binocular DIC system

Fig. 3. Conversion relationship between virtual and real images

Fig. 4. Schematic of experimental setup. (a) Main equipment; (b) physical map of high temperature furnace

Fig. 5. Physical map of the part. (a) Prototype diagram; (b) three side schematic

Fig. 6. Reconstruction process of outer surface of the part. (a) 3D scatter plot; (b) 3D outline sketch; (c) 3D reconstruction of the surface versus the fitted surface deviation cloud map

Fig. 7. Thermal deformation results of three outer surfaces of the part. (a) Displacement cloud diagram of part A surface before (310 ℃) and after (20 ℃) thermal deformation; (b) displacement cloud diagram of part B surface after thermal deformation; (c) displacement cloud diagram of part C surface after thermal deformation

Fig. 8. Variation curves of heights of surfaces A, B, and C during the cooling process

Fig. 9. Meshing diagram and thermal deformation simulation on the part by ANSYS. (a) Finite element meshing diagram of the part; (b) simulation result of thermal deformation of the part