This study presents numerical simulations of UVC light propagation through seven different filtered face respirators (FFR) to determine their suitability for Ultraviolet germicidal inactivation (UVGI). UV propagation was modeled using the FullMonte program for two external light illuminations. The optical properties of the dominant three layers were determined using the inverse adding doubling method. The resulting fluence rate volume histograms and the lowest fluence rate recorded in the modeled volume, sometimes in the nW cm⁻², provide feedback on a respirator's suitability for UVGI and the required exposure time for a given light source. While UVGI can present an economical approach to extend an FFR's useable lifetime, it requires careful optimization of the illumination setup and selection of appropriate respirators.

中文翻译：

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N95过滤式面部呼吸器内的光传播：UVC去污的模拟研究。

这项研究提出了通过7种不同的过滤式面部呼吸器（FFR）进行UVC光传播的数值模拟，以确定它们是否适用于紫外线杀菌灭活（UVGI）。使用FullMonte程序对两个外部光照射进行UV传播建模。使用反向加倍法确定了主要三层的光学性质。结果通量率体积直方图和最低通量率记录在模型体积中，有时以nW cm ^-2记录，提供有关呼吸器对UVGI的适用性以及给定光源所需的暴露时间的反馈。虽然UVGI可以提供一种经济的方法来延长FFR的使用寿命，但它需要仔细优化照明设置并选择合适的呼吸器。