Reflectance properties of finite-size turbid media

Analytic expressions for the position-dependent reflectance of light were derived from a classical diffusion propagator. A modified transport propagator which describes the crossover from the ballistic to the diffusive propagation, and a cross-polarized component propagator. The theoretical reflectances are compared with the experimental ones and their potential for describing finite-size turbid media is discussed. It is found that the cross-polarized propagator provides the best agreement with the experimental data at the low volume fraction of scatterers, for a wide range of separation distances.