Fig. 1. Aspheric surface testing optical path

Fig. 2. Simulation process

Fig. 3. SLM with different pixel pitches in simulation model. (a) 36 sampling points in one pixel; (b) 9 sampling points in one pixel

Fig. 4. Surface 1 in the simulation model

Fig. 5. Compensation wave-front error changes with pixel pitch. (a) PV changes with pixel pitch; (b) RMS changes with pixel pitch

Fig. 6. Schematic of compensation wave-front after divide

Fig. 7. Frequency distribution of compensation wave-front error when R=1500 mm. (a) PV changes with frequency; (b) RMS changes with frequency