Fig. 1. Adaptive optical control loop

Fig. 2. Adaptive optical correction system based on far field metrics

Fig. 3. Schematic of gradient calculation

Fig. 4. Adaptive optical hardware platform and effective subaperture spots of H-S sensor. (a) Hardware platform; (b) effective subaperture spots

Fig. 5. Effective subaperture spots of H-S sensor, iterative process of SR mean and SR values after system convergence. (a) Effective subaperture spots; (b) SR mean; (c) SR values after system convergence

Fig. 6. Twenty subapertures of H-S sensor under missing light condition, iterative process of SR and SR values after system convergence. (a) Subaperture; (b) iterative process of SR; (c) SR values after system convergence

Fig. 7. Schematic of neighborhood interpolation

Fig. 8. Forty subapertures of H-S sensor under missing light condition, iterative process of SR and SR values after system convergence. (a) Subaperture; (b) iterative process of SR; (c) SR values after system convergence

Fig. 9. Correction performance of three methods underdifferent centroid detection conditions