Fig. 1. Schematic diagram of phase modulation of liquid crystal spatial light modulator

Fig. 2. (a) Schematic diagram of the Tyman-Green light path; (b) Diagram of experimental device for phase modulation measurement system

Fig. 3. (a) Gray scale of the lower half is 0; (b) Gray scale of the lower half is 125; (c) Gray scale of the lower half is 255

Fig. 4. (a) Interference fringe pattern when the gray level is 0; (b) Interference fringe pattern when the gray level is 125; (c) Interference fringe pattern when the gray level is 255

Fig. 5. Original phase modulation curve

Fig. 6. Relationship between enter grayscale and drive grayscale

Fig. 7. Contrast diagram of ideal phase and corrected phase modulation curve

Fig. 8. (a) Diagram of experimental light path; (b) Graph of wxperimental scene

Fig. 9. (a) = , =1.56°; (b) = , =0.78°; (c) = , =0.39° (a) = , =1.56°; (b) = , =0.78°; (c) = , =0.39°

Fig. 10. (a) Not optimized; (b) Stochastic parallel gradient descent method; (c) The proposed method

Fig. 11. (a) Not optimized; (b) Stochastic parallel gradient descent method; (c) The proposed method

Fig. 12. (a) Not optimized; (b) Stochastic parallel gradient descent method; (c) The proposed method