Fig. 1. Flow chart for the threshold value calculation.

Fig. 2. Error diffusion process.

Fig. 3. Flow chart of the error diffusion process.

Fig. 4. Schematic diagram of experimental setup.

Fig. 5. Schematic diagram of the beam caliber in the digital micro-mirror device.

Fig. 6. Schematic diagram of the definition of the beam softening factor.

Fig. 7. Primary shaping aperture written in the digital micro-mirror device and partially enlarged drawing.

Fig. 8. (a) Two-dimensional distribution of the output spot. (b) Three-dimensional distribution of the output spot. (c) One-dimensional distribution of the pixel y=320 after primary shaping.

Fig. 9. Secondary shaping aperture written in the digital micro-mirror device.

Fig. 10. (a) Two-dimensional distribution of the output spot. (b) Three-dimensional distribution of the output spot. (c) One-dimensional distribution of the pixel y=320 after secondary shaping.

Fig. 11. Near-field modulation degree distribution of 20 output beams.