Fig. 1. Schematic of dual-wavelength shearography setup

Fig. 2. Diagrams of image shearing. (a) Before shearing; (b) after shearing

Fig. 3. Diagram of optical path and displacement. (a) Green laser; (b) blue laser

Fig. 4. Cantilever beam. (a) Schematic of geometric arrangement; (b) loading setup

Fig. 5. Color speckle pattern and its RGB components

Fig. 6. Wrapped phase maps. (a) Green channel; (b) blue channel

Fig. 7. Experimental and theoretical comparison chart. (a) Derivative of measured in-plane displacement; (b) finite element simulation to calculate in-plane strain; (c) derivative of measured out-of-plane displacement; (d) dw/dx comparison of experimental and theoretical solutions