Fig. 1. Schematic of irradiation of LED projectile spotlights

Fig. 2. LED light source. (a) Real map of module; (b) spectral curve

Fig. 3. Structural diagram of optical system for LED projectile spotlights

Fig. 4. Schematic of ring structure for Fresnel lens

Fig. 5. Optical path tracing

Fig. 6. Schematic of focusing by cylindrical Fresnel lens

Fig. 7. Schematic of imaging by cylindrical Fresnel lens

Fig. 8. Simulation results. (a) Results by ray tracing; (b) illuminance distribution on receiving surface

Fig. 9. Experimental effects of projectile spotlight. (a) Real map; (b) indoor lighting effect; (c) outdoor test effect; (d) irradiation effect of some military target