Fig. 1. Flow chart of the digital simulation platform for Shack-Hartmann wavefront sensor

Fig. 2. Southwell model

Fig. 3. Structure of the simulation platform for Shack-Hartmann wavefront sensor

Fig. 4. Control interface of the Shack-Hartmann wavefront sensor simulation platform. (a) Control interface of the simulation wavefront; (b) control interface of the spot location; (c) control interface of the wavefront reconstruction

Fig. 5. Distribution of sub-apertures. (a) Category 1; (b) category 2; (c) category 3

Fig. 6. Addition of different noises. (a) Gaussian noise; (b) Poisson noise; (c) salt and pepper noise; (d) special noise

Fig. 7. Simulation process of the Shack-Hartmann wavefront sensor. (a) Distorted wavefront; (b) noise-free spot image; (c) noisy spot image; (d) spot location; (e) wavefront reconstruction; (f) wavefront residual

Fig. 8. Theoretical and simulated variances of the Kolmogorov turbulent wavefront

Fig. 9. Verification result of spot positioning. (a) Average positioning error under different SNR; (b) modulated light spot centroid movement trajectory

Fig. 10. Verification of wavefront reconstruction. (a) Wavefront reconstruction error with no noise; (b) wavefront reconstruction error under different SNR