本文介绍了测定材料漫反射特性的原理和检测系统的结构。利用该检测系统，对氧化镁、硫酸钡、聚四氟乙稀等制成的白板材料进行了紫外波段的实测，并且把它们同朗伯漫反射体进行了比较，对其偏差进行了讨论。此项研究结果，为太阳紫外光谱监视器的辐射定标奠定了基础。 This article describes the principle of measuring the diffuse reflectance characteristics of materials and the structure of the detection system. Using the detection system, white plate materials made of magnesia, barium sulfate, polytetrafluoroethane and so on were measured in the UV range and compared with Lambertian diffuse reflectors, and their deviations were discussed. The results of this study laid the foundation for the radiation calibration of the solar ultraviolet spectrum monitor.