真空紫外反射率计用于BRDF的测量

Measurement of BRDF by using the VUV reflectometer

：介绍了一种真空紫外反射率计，采用间接测量方法，在该反射率计测试了聚四氟乙烯漫反射板的双向反射率分布函数（ＢＲＤＦ），正入射时该聚四氟乙烯漫反射板１５°到７５°的双向反射率分布函数偏差为１３％。

The VUV reflectometer was established. By using this equipment, the BRDF of the diffuser which was abrade of polyfluortetraethylene was indirectly Measuremented. At normal incidence, the BRDF of the diffuser changes about 13% over 15°～75° scatter angle range.