Fig. 1. Optical path of parallel confocal imaging system based on DMD

Fig. 2. Parameters of DMD spot array. (a) Modulation of spot size; (b) modulation of spot interval (taking 2×2 micromirrors for example)

Fig. 3. DMD scanning mode of spot array with 1×1 spot size and two times of spot interval. (a) Traditional arrangement mode; (b) used arrangement mode; (c) used scanning mode

Fig. 4. Comparison of axial resolution with different spot sizes. (a) Depth response curves of different spot sizes; axial imaging depth of (b) 1×1, (c) 2×2 and (d) 3×3 spot sizes

Fig. 5. Comparison of axial resolution with different spot intervals. (a) 1×1 spot size; (b) 2×2 spot size; (c) 3×3 spot size

Fig. 6. Imaging of resolution plate with different spot arrays. (a) 1×1 spot size and two times of spot interval; (b)-(e) 1×1 spot size and two, four, six, eight times of spot interval; (f)-(i) 2×2 spot size and two, four, six, eight times of spot interval; (j)-(m) 3×3 spot size and two, four, six, eight times of spot interval

Fig. 7. (a) Vertical section line of “9-2” line pairs on resolution plate with spot size of 1×1 and T=4; (b) change of gray level of vertical section line in Fig. 7(a); (c) vertical section line of “8-5” line pairs on resolution plate with spot size of 2×2 and T=4; (d) change of gray level of vertical section line in Fig. 7(c); (e) vertical section line of “8-2”line pairs on resolution plate with spot size of 3×3 and T=4; (f) change of gray level of vertical section line in Fig. 7(e)

Fig. 8. Contrast of image with 1×1 spot size and different spot intervals

Fig. 9. Comparison of imaging speeds with different spot intervals

Fig. 10. Imaging of three-dimensional body grating. (a) Wide field imaging and (b) its intensity distribution; (c) parallel scanning imaging of optimal spot array and (d) its intensity distribution; (e) Leica confocal microscopy imaging and (f) its intensity distribution