Figure 3.

Estimates of the diffuse reflectance as a function of spatial frequency f_x between 0 and 0.25 mm⁻¹ predicted by Monte Carlo simulations. The solid curve indicated by (a) was generated with μ_{a, 1} equaling 0.1 mm⁻¹, ${\mu }_{\mathrm{s},1}^{\prime }$ equaling 1 mm⁻¹, d₁ equaling 100 μm, μ_{a, 2} equaling 0.01 mm⁻¹, and ${\mu }_{\mathrm{s},2}^{\prime }$ equaling 1.7 mm⁻¹, while the broken curve was generated with μ_{a, 1} equaling 0.21 mm⁻¹, ${\mu }_{\mathrm{s},1}^{\prime }$ equaling 0.5 mm⁻¹, d₁ equaling 50 μm and the same values of μ_{a, 2} and ${\mu }_{\mathrm{s},2}^{\prime }$. The solid curve indicated by (b) was generated with μ_{a, 1} equaling 0.2 mm⁻¹, ${\mu }_{\mathrm{s},1}^{\prime }$ equaling 2 mm⁻¹, d₁ equaling 20 μm, μ_{a, 2} equaling 0.01 mm⁻¹, and ${\mu }_{\mathrm{s},2}^{\prime }$ equaling 1.0 mm⁻¹ while the broken curve was generated with μ_{a, 1} equaling 0.1 mm⁻¹, ${\mu }_{\mathrm{s},1}^{\prime }$ equaling 1 mm⁻¹, d₁ equaling 50 μm and the same values of μ_{a, 2} and ${\mu }_{\mathrm{s},2}^{\prime }$.