【摘要】 采用多波长激光作光源和不同的光束发散角模拟远、进场照明，研究了民（聚四氟乙烯）粉末压制的漫反射标准板的角散射分布特性和其偏振特性，结果表明民标准权无论对远场还是近场光束均呈现良好的漫反射特性并具有良好的消偏振性能．更多还原

【Abstract】 Angular distribution and depolarization properties of polytetrafluoroethylene diffusereflective plate were investigated under multiwavelength laser illumination with difference beamdivergences. Results indicate that this plate has a good diffuse reflectance and depolarization propertieswhich can be used as a standard of diffuse reflectance.更多还原