Fig. 1. Optical path diagram of the telescope

Fig. 2. Anti-Galilean collimating expansion system

Fig. 3. Schematic diagram of dynamic focusing projection system

Fig. 4. Ideal optical path diagram of dynamic focusing lens

Fig. 5. Light spot and wave aberration of receiving surface at different distances. (a) Spot at the distance of 4200 mm; (b) wave aberration at the distance of 4200 mm; (c) spot at the distance of 4800 mm; (d) wave aberration at the distance of 4800 mm

Fig. 6. Experimental setup of laser scanning projection system

Fig. 7. Experimental plots of projected spot at different distances. (a) System without collimated beam expander group; (b) s=4200 mm; (c) s=4400 mm; (d) s=4600 mm; (e) s=4800 mm