Fig. 1. Original grating image

Fig. 2. Complementary principle. (a) 0° phase-shift grating; (b) 180° phase-shift grating; (c) 0° and 180° phase-shift superposition grating; (d) 90° phase-shift grating; (e) 270° phase-shift grating; (f) 90° and 270° phase-shift superposition grating

Fig. 3. Phase separation results. (a) H1; (b) H2; (c) L1; (d) H1; (e) H6; (f) R1

Fig. 4. Phase principal value. (a) Left phase; (b) right phase

Fig. 5. Measurement system. (a) Experimental device; (b) system layout

Fig. 6. Experimental results of gypsum model. (a) Measured object; (b) measurement result; (c) left phase principal value; (d) right phase principal value; (e) left projection point cloud; (f) right projection point cloud; (g) left view of composite point cloud; (h) right view of composite point cloud

Fig. 7. Experimental results of staircase plane. (a) Measured object; (b) measurement result; (c) left projection point cloud; (d) right projection point cloud

Fig. 8. (a) Measured object in rotator experiment and experimental diagram. (a) Measured object; (b) experimental diagram

Fig. 9. Experimental results of rotator. (a) Left projection point cloud; (b) right projection point cloud; (c) composite point cloud