Existing random phase screen (RPS) models for forward multiple-scattering media fail to incorporate ballistic light. In this Letter, we redesign the angular spectrum of the screen by means of Monte Carlo simulation based on an assumption that a single screen should represent all the scattering events a photon experiences between two adjacent screens. Three examples demonstrate that the proposed model exhibits more realistic optical properties than conventional RPS models in terms of attenuation of ballistic light, evolution of beam profile, and angular memory effect. The proposed model also provides the flexibility to balance the computing accuracy, speed, and memory usage by tuning the screen spacing.

中文翻译：

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现实的相位屏幕模型，用于正向多重散射媒体。

现有的用于前向多散射介质的随机相位屏蔽（RPS）模型无法合并弹道光。在这封信中，我们基于一个假设，即单个屏幕应代表光子在两个相邻屏幕之间经历的所有散射事件，通过蒙特卡洛模拟重新设计屏幕的角谱。三个例子表明，与传统的RPS模型相比，所提出的模型在弹道光的衰减，射束轮廓的演变以及角度记忆效应方面表现出更为逼真的光学特性。所提出的模型还提供了灵活性，可以通过调整屏幕间距来平衡计算精度，速度和内存使用。