Fig. 1. Diffuse reflection light intensity profiles under different incident angles of excitation light

Fig. 2. Beam cross section during light propagation

Fig. 3. Architecture diagram of residual neural network

Fig. 4. Relationship between incident angle and normalized semimajor axis

Fig. 5. Diffuse reflection light intensity profiles under different incident angles of excitation light when μ_a＝4.25 cm^－1，μ_s＝225 cm^－1, g＝0.65, and n＝1.3. (a) 24°；(b) 30°；(c) 36°；(d) 42°；(e) 48°；(f) 54°；(g) 60°

Fig. 6. Diffuse reflection light intensity versus r at different incident angles of excitation light

Fig. 7. Mean relative errors of optical parameter versus SNR and number of input diffuse reflection light intensity profiles. (a) μ_a;(b) μ_s;(c) g; (d) n