Fig. 1. Design of laboratory extinction simulation measurement system for atmospheric pollution particles

Fig. 2. 3D illustration of model

Fig. 3. The transmission of 532 nm laser in the open Herriot long path absorption cell

Fig. 4. Physical map of meteorological station

Fig. 5. Model after modification of Herriot long-path absorption cell

Fig. 6. Morphology of particles with five different particles

Fig. 7. Effective particle size distribution of SiO₂ particles with five different particle sizes in pollution simulation detection module

Fig. 8. Morphology of 0.4 µm SiO₂ particles detected in pollution simulation detection chamber

Fig. 9. Extinction comparison from laboratory measurement，lidar and theoretical calculation

Fig. 10. Comparison of extinction under different particle sizes

Fig. 11. Comparison of effective particle sizes detected by SiO₂ and Al₂O₃ in pollution simulation detection module

Fig. 12. Comparison of extinction of Al₂O₃，SiO₂ and lidar