Fig. 1. Propagation direction of light in liquid crystal. (a) Incident light along the optical axis; (b) ordinary light; (c) extraordinary light

Fig. 2. Schematic diagram of proposed system

Fig. 3. Experiment setup

Fig. 4. Specimens photos. (a) Thimble loading specimen; (b) specimen with defects

Fig. 5. Periodic fringe images written in LC-SLM. (a) Vertical fringe image; (b) horizontal fringe image

Fig. 6. Results of thimble loading. (a) Phase map in x shearing direction; (b) filtered phase map in x shearing direction; (c) phase map in y shearing direction; (d) filtered phase map in y shearing direction

Fig. 7. Results of detecting defects