ISO 877-3:2018规定了使用反射聚光器将塑料暴露在集中太阳辐射下以加速风化过程的方法。目的是评估此类风险暴露特定阶段后产生的财产变化。这些曝光中使用的反射聚光器有时被称为“菲涅耳反射器”，因为在横截面上，用于集中太阳辐射的反射镜阵列类似于菲涅耳透镜的横截面。 ISO 877-1中给出了有关ISO 877系列范围的一般指南。 注:参考文献中给出了有关太阳能聚光照射的其他信息，包括指定标准的部分列表。

ISO 877-3:2018 specifies a method for exposing plastics to concentrated solar radiation using reflecting concentrators to accelerate the weathering processes. The purpose is to assess property changes produced after specified stages of such exposures. The reflecting concentrators used in these exposures are sometimes referred to as "Fresnel reflectors" because in cross-section the array of mirrors used to concentrate the solar radiation resembles the cross-section of a Fresnel lens. General guidance concerning the scope of the ISO 877 series is given in ISO 877？1. NOTE Additional information about solar concentrating exposures, including a partial list of standards in which they are specified, is given in the Bibliography.