Marinyuk V V
J Opt Soc Am A Opt Image Sci Vis. 2015 Jul 1;32(7):1330-6. doi: 10.1364/JOSAA.32.001330.
Propagation of a broad beam of light in a two-dimensional absorbing medium with large (compared to the light wavelength) inhomogeneities is considered. Within the small-angle approximation, an exact analytical solution to the radiative transfer equation is found for a phase function that decreases exponentially with the single-scattering angle. Attenuation of the total flux and evolution of the angular distribution of light are analyzed in detail. An accuracy of the small-angle diffusion approximation is estimated.
考虑了一束宽光束在具有大的（与光波长相比）不均匀性的二维吸收介质中的传播。在小角度近似下，对于随单次散射角呈指数下降的相位函数，找到了辐射传输方程的精确解析解。详细分析了总通量的衰减和光的角分布的演化。估计了小角度扩散近似的精度。
