Fig. 1. Diagram of diffuse reflectance measurement by a small detector aperture

Fig. 2. Relation between γ and δ for different g

Fig. 3. (a) Variation of diffuse reflectance with detector aperture when g=0.65; (b) variation of diffuse reflectance with detector aperture when γ=1.5; (c) relative change of diffuse reflectance in Fig. 3(a) with reference to point B; (d) relative change of diffuse reflectance in Fig. 3(c) with reference to point E

Fig. 4. (a) Variation of diffuse reflectance with μ's when g=0.65; (b) relations between k1 (or k2) and γ; (c) variation of diffuse reflectance with μ's when γ=1.5; (d) relations between k1 (or k2) and δ

Fig. 5. Relation between diffuse reflectance and γ for various g when μa=0.1 mm-1 and μ's=2 mm-1