Fig. 1. Schematic of wavefront sensorless adaptive optics system

Fig. 2. Convergence simulations of SPGD algorithm under 100 groups of random wavefront aberrations with D₀/r₀=2.5. (a) Results of SPGD algorithm based on M; (b) results of SPGD algorithm based on J

Fig. 3. Convergence simulations of SPGD algorithm under 100 groups of random wavefront aberrations with D₀/r₀=5. (a) Results of SPGD algorithm based on M; (b) results of SPGD algorithm based on J

Fig. 4. Statistic average SR curves of SPGD algorithms under 100 groups of random wavefront aberrations

Fig. 5. Experimental system for correcting wavefront aberrations of FZP. (a) Experimental system; (b) principle of experiment

Fig. 6. Far-field spots of FZP with and without wavefront aberration correction. (a) Spot before correction; (b) corrected spot with optimization index of M; (c) corrected spot with optimization index of J; (d) corrected spot with optimization index of P

Fig. 7. Peak intensity in iteration of SPGD algorithm

Fig. 8. Effective radius of far-field spot in iteration of SPGD algorithm

Fig. 9. Control voltage of SPGD algorithm. (a) Control voltage based on optimization index of M; (b) control voltage based on optimization index of J; (c) control voltage based on optimization index of P