Lemaillet Paul, Patrick Heather J, Germer Thomas A, Hanssen Leonard, Johnson B Carol, Georgiev Georgi T
National Institute of Standards and Technology, 100 Bureau Drive, Gaithersburg, MD 20899.
National Aeronautics and Space Administration, Goddard Space Flight Center, Greenbelt, MD 20771.
Proc SPIE Int Soc Opt Eng. 2016 Sep 1;9961. doi: 10.1117/12.2237975.
Fused silica diffusers, made by forming scattering centers inside fused silica glass, can exhibit desirable optical properties, such as reflectance or transmittance independent of viewing angle, spectrally flat response into the ultraviolet wavelength range, and good spatial uniformity. The diffusers are of interest for terrestrial and space borne remote sensing instruments, which use light diffusers in reflective and transmissive applications. In this work, we report exploratory measurements of two samples of fused silica diffusers. We will present goniometric bidirectional scattering distribution function (BSDF) measurements under normal illumination provided by the National Institute of Standards and Technology (NIST)'s Goniometric Optical Scatter Instrument (GOSI), by NIST's Infrared reference integrating sphere (IRIS) and by the National Aeronautics and Space Administration (NASA)'s Diffuser Calibration Laboratory. We also present hemispherical diffuse transmittance and reflectance measurements provided by NIST's Double integrating sphere Optical Scattering Instrument (DOSI). The data from the DOSI is analyzed by Prahl's inverse adding-doubling algorithm to obtain the absorption and reduced scattering coefficient of the samples. Implications of fused silica diffusers for remote sensing applications are discussed.
通过在熔融石英玻璃内部形成散射中心制成的熔融石英漫射器，可呈现出理想的光学特性，如反射率或透射率与视角无关、在紫外波长范围内具有光谱平坦响应以及良好的空间均匀性。这些漫射器对于地面和星载遥感仪器很有意义，这些仪器在反射和透射应用中使用光漫射器。在这项工作中，我们报告了对两个熔融石英漫射器样品的探索性测量。我们将展示在国家标准与技术研究院（NIST）的测角光学散射仪（GOSI）、NIST的红外参考积分球（IRIS）以及美国国家航空航天局（NASA）的漫射器校准实验室提供的正常照明下的测角双向散射分布函数（BSDF）测量结果。我们还展示了由NIST的双积分球光学散射仪（DOSI）提供的半球形漫射透射率和反射率测量结果。通过Prahl的反向相加加倍算法对来自DOSI的数据进行分析，以获得样品的吸收系数和约化散射系数。讨论了熔融石英漫射器在遥感应用中的意义。
