Fig. 1. Schematic diagram of Mie scattering spatial relationship

Fig. 2. Surface particle dust light diagram

Fig. 3. Surface dig light diagram

Fig. 4. Influence of different refractive indexes with three types of particle size on m₃₃ values of particle contamination and dig. (a) 1 μm; (b) 5 μm; (c) 10 μm

Fig. 5. Influence of different real part of contamination refractive indexes with three types of different particle sizes on m₃₃values of particle contamination. (a) 1 μm; (b) 5 μm; (c) 10 μm

Fig. 6. Influence of different imaginary part of contamination refractive indexes with three types of particle size on m₃₃values of particle contamination. (a) 1 μm; (b) 5 μm; (c) 10 μm

Fig. 7. Influence of D/λ on m₃₃ values of particle contamination and dig. (a) D/λ=25/12; (b) D/λ=25/6; (c) D/λ=25/3

Fig. 8. Influence of D/λ on absolute difference of Mueller values of particle contamination and dig. (a) Absolute difference of m₁₂; (b) absolute difference of m₃₃; (c) absolute difference of m₃₄

Fig. 9. Influence of incident angles on m₃₃. (a) Particle contamination; (b) dig

Fig. 10. Influence of incident angles on absolute difference of Mueller values of particle contamination and dig. (a) Absolute difference of m₁₂; (b) absolute difference of m₃₃; (c) absolute difference of m₃₄

Fig. 11. Experimental schematic diagram

Fig. 12. Comparison of simulation results with experimental results. (a) 20°; (b) 60°