本文构造了激光平行入射二维半透明介质的物理模型,研究了蒙特卡洛法、离散传递法中的假散射。通过分析 边界净热流研究了蒙特卡洛法、离散传递法中的射线效应。计算分析表明:蒙特卡洛法、离散传递法不存在假散射。蒙特 卡洛法不存在射线效应,离散传递法存在射线效应。在离散传递法中,随着射线数的增加,射线效应逐渐减少。 In this paper, the physical model of two-dimensional semi-transparent laser with parallel incident laser is constructed. The Monte Carlo method and the pseudo-scattering in discrete propagation method are studied. The ray effects in Monte Carlo method and discrete transfer method are studied by analyzing the net boundary heat flux. Calculation and analysis show that there is no pseudo-scatter in the Monte-Carlo method and discrete transfer method. There is no ray effect in the Monte Carlo method, and a ray effect in the discrete method. In the discrete transfer method, as the number of rays increases, the radiation effect decreases.