Fig. 1. Procedure of orthogonal composite grating

Fig. 2. Procedure of OCGGE

Fig. 3. Experimental contrast between OCG and OCGGE. (a), (f) Deformed pattern of OCG and OCGGE; (b), (g) spectrum distribution of OCG and OCGGE; (c), (d), (e) OCG cutaway views at column 512 of the deformed phase shifting fringe patterns extracting from filter1, filter2, filter3; (h), (i), (j) OCGGE cutaway views at column 512 of the deformed phase shifting fringe patterns extracting from filter4, filter5, filter6; (k) reconstructed result of OCG; (l) zoom in on the dashed box from Fig.3(k); (m) reconstructed result of OCGGE

Fig. 4. Comparison results between OCG, OCGGE and PMP. (a) Measured object; (b) deformed pattern of OCGGE; (c) reconstructed result with OCGGE; (d) cutaway view at column 476 with OCG, OCGGE and PMP; (e) magnified view of the dashed box from Fig. 4(d); (f) magnified view of the point line box from Fig. 4(d)