Fig. 1. Reflection and refraction of light at mirror surface

Fig. 2. Schematic diagram of light scattering on coating surface

Fig. 3. Rotation of polarized light reference coordinate

Fig. 4. Measurement results of sample and its surface microfacet morphology. (a) Sample to be tested; (b) micromorphology of painted copper surface; (c) micromorphology of painted aluminum surface

Fig. 5. Imaging ellipsometer and experimental optical path. (a) Imaging ellipsometer; (b) schematic diagram of experimental optical path

Fig. 6. Comparison of experimentally measured values of DOP with PBRDF calculated values at different incident angles. (a) Painted copper surface; (b) painted aluminum surface

Fig. 7. Influence of incident angle on S₀. (a) θ_i=30°; (b) θ_i=45°; (c) θ_i=60°

Fig. 8. Influence of incident angle on DOP. (a) θ_i=30°; (b) θ_i=45°; (c) θ_i=60°

Fig. 9. Influence of surface roughness α on S₀. (a) α=0.2; (b) α=0.4; (c) α=0.6

Fig. 10. Influence of surface roughness α on DOP. (a) α=0.2; (b) α=0.4; (c) α=0.6

Fig. 11. Influence of basal material on S₀. (a) Copper; (b) aluminum; (c) nickel-iron alloy

Fig. 12. Influence of basal material on DOP. (a) Copper; (b) aluminum; (c) nickel-iron alloy

Fig. 13. Influence of coating optical thickness on S₀. (a) d_e=λ/8; (b) d_e=λ/4; (c) d_e=λ/2

Fig. 14. Influence of coating optical thickness on DOP. (a) d_e=λ/8; (b) d_e=λ/4; (c) d_e=λ/2