Fig. 1. Binary amplitude of one-dimensional Dammann grating in one period

Fig. 2. Phase structure of two-dimensional Dammann grating in one period

Fig. 3. Flow chart of design step

Fig. 4. Structure of 5×5 lattice grating

Fig. 5. Simulation results of structured light distribution

Fig. 6. Physical image of structured light reproduction experiment based on liquid crystal spatial light modulator

Fig. 7. Distributions of 5×5 lattice structured light at different diffraction distances. (a) Diffraction distance is 30 cm; (b) diffraction distance is 50 cm