Hanssen Leonard, Wilthan B, Monte Christian, Hollandt Jörg, Hameury Jacques, Filtz Jean-Remy, Girard Ferruccio, Battuello Mauro, Ishii Juntaro
National Institute of Standards and Technology (NIST), Sensor Science Division, Gaithersburg, MD, USA.
National Institute of Standards and Technology (NIST), Sensor Science Division, Gaithersburg, MD, USA; currently with NIST, Applied Chemical and Materials Division, Boulder, CO, USA.
Metrologia. 2016;53(Technical Suppl). doi: 10.1088/0026-1394/53/1A/03001.
The National Measurement Institutes (NMIs) of the United States, Germany, France, Italy and Japan, have joined in an inter-laboratory comparison of their infrared spectral emittance scales. This action is part of a series of supplementary inter-laboratory comparisons (including thermal conductivity and thermal diffusivity) sponsored by the Consultative Committee on Thermometry (CCT) Task Group on Thermophysical Quantities (TG-ThQ). The objective of this collaborative work is to strengthen the major operative National Measurement Institutes' infrared spectral emittance scales and consequently the consistency of radiative properties measurements carried out worldwide. The comparison has been performed over a spectral range of 2 μm to 14 μm, and a temperature range from 23 °C to 800 °C. Artefacts included in the comparison are potential standards: oxidized inconel, boron nitride, and silicon carbide. The measurement instrumentation and techniques used for emittance scales are unique for each NMI, including the temperature ranges covered as well as the artefact sizes required. For example, all three common types of spectral instruments are represented: dispersive grating monochromator, Fourier transform and filter-based spectrometers. More than 2000 data points (combinations of material, wavelength and temperature) were compared. Ninety-eight percent (98%) of the data points were in agreement, with differences to weighted mean values less than the expanded uncertainties calculated from the individual NMI uncertainties and uncertainties related to the comparison process.
美国、德国、法国、意大利和日本的国家计量院参与了一次关于其红外光谱发射率标准的实验室间比对。这一行动是由温度咨询委员会（CCT）热物理量任务组（TG-ThQ）发起的一系列补充实验室间比对（包括热导率和热扩散率）的一部分。这项合作工作的目的是加强主要国家计量院的红外光谱发射率标准，从而提高全球范围内辐射特性测量的一致性。比对在2μm至14μm的光谱范围内以及23°C至800°C的温度范围内进行。比对中包含的标准物质是潜在标准：氧化因科镍、氮化硼和碳化硅。用于发射率标准的测量仪器和技术对每个国家计量院来说都是独特的，包括所覆盖的温度范围以及所需的标准物质尺寸。例如，三种常见类型的光谱仪器都有代表：色散光栅单色仪、傅里叶变换光谱仪和基于滤光片的光谱仪。比较了2000多个数据点（材料、波长和温度的组合）。98%的数据点一致，与加权平均值的差异小于根据各个国家计量院的不确定度以及与比对过程相关的不确定度计算出的扩展不确定度。
