Fig. 1. Frequency shift principle of SHG-psSIM. (a) Moiré phenomenon; (b) OTF of C-SHG; (c) frequency shift process of SHG-psSIM; (d) expanded OTF of SHG-psSIM

Fig. 2. SHG-psSIM setup

Fig. 3. Comparison of ZnO nanoparticles imaged by C-SHG and SHG-psSIM. (a) Images of ZnO nanoparticles (lower left: C-SHG, upper right: SHG-psSIM); (b) magnified image of rectangle area in Fig. 3 (a) imaged by C-SHG; (c) magnified image of rectangle area in Fig. 3 (a) imaged by SHG-psSIM; (d) normalized intensity curve

Fig. 4. Resolution improvement for imaging mouse tail tendon. (a) Super-resolution image of mouse tail tendon (lower left: C-SHG, upper right: SHG-psSIM); (b) magnified image of rectangle area in Fig. 4 (a) imaged by C-SHG; (c) magnified image of rectangle area in Fig. 4 (a) imaged by SHG-psSIM; (d) normalized intensity curve