Fig. 1. Structural diagram of source simulation system based DMD

Fig. 2. Imaging performance of experimental system. (a) MTF curve; (b) field curvature and distortion

Fig. 3. DMD's azimuth in the imaging light path. (a) DMD array plane perpendicular to the lighting optical axis; (b) DMD array plane perpendicular to the imaging optical axis; (c) diagram of distance between B_i and B_j

Fig. 4. DMD mounted on optical platform with rotation angle of 45°

Fig. 5. Shaded model diagram of simulation system with Zemax non-sequence mode

Fig. 6. Distortion measurement template

Fig. 7. Distortion curves with different lighting sources. (a) Parallel source lighting; (b) ideal parallel source lighting; (c) non-parallel light source lighting (after point light source moving -1 mm along the axis); (d) non-parallel light source lighting (after point light source moving +1 mm along the axis)

Fig. 8. DMD pitch angle deviation, azimuth angle deviation, and roll angle deviation as functions of distortion in different FOVs

Fig. 9. Source simulation experimental system based on DMD. (a) Experimental light path; (b) collected image in distortion measurement experiment

Fig. 10. Distortion curve of experimental system

Fig. 11. Black and white grid images used to test contrast. (a) Input image of DMD; (b) acquired image of CMOS

Table 1. Main optical parameters of experimental system

Table 2. Table of feature points corresponding to three FOVs

Table 3. Distortion of system design, system simulation, and experiment