基于高温黑体辐射源BB3500M,中国计量科学研究院(NIM)自主研制了第四代光谱辐射亮度国家基准装置,波长范围覆盖220~2550nm,以稳定的钨带灯作为传递标准,改善了测量不确定度。黑体辐射源的温度测量溯源至Pt-C和Re-C固定点黑体,在3021 K采用WC-C固定点黑体进行验证,NIM和全俄光学物理计量院(VNIIOFI)之间的测量偏差小于70 mK。采用新基准装置,NIM参加了光谱辐射亮度国际APMP-PR.S6比对。NIM研制了两套入射光学系统,成像倍率分别为0.58和1.00,立体角为0.006sr和0.008sr,采用两套系统复现光谱辐射亮度量值的差异小于±0.40%。APMP-PR.S6比对结果表明:在紫外、可见和近红外波长范围,NIM与参考值的平均相对偏差分别为0.59%、0.44%和0.34%。全部波长范围的平均相对偏差0.46%。在250nm、400nm、800nm、2500nm波长,光谱辐射亮度的测量标准不确定度分别为0.95%、0.50%、0.41%和0.80%。从而验证了第四代光谱辐射亮度国家基准装置的准确性和可靠性。
Abstract
Based on BB3500M high temperature blackbody, the fourth-generation primary standard apparatus of spectral radiance was developed at National Institute of Metrology (NIM) in the spectral wavelength from 220nm to 2550nm.A group of stable tungsten strip lamps were used as the transfer standards.The temperature measurement of the high temperature blackbodies were traced to the Pt-C and Re-C fixed point blackbodies and checked against the WC-C fixed-point blackbody, and the consistency of the temperature realized by NIM and All Russian Research Institute for Optical and Physical Measurements (VNIIOFI) at 3021 K was better than 70mK.Spectral radiance was realized by two different entrance systems at NIM respectively, and the imaging ratio of the two system were 0.58 and 1.00, the solid angle were 0.006sr and 0.008sr.The relative deviation of spectral radiance was less than ±0.40% by using the two system at all wavelengths.With the new developed primary standard apparatus, NIM took part in the international comparison of spectral radiance APMP-PR.S6.The comparison result shows that the average relative deviation are 0.59%, 0.44% and 0.34% respectively in ultraviolet, visible and near infrared wavelength.The average relative deviation in the whole wavelength is 0.46%.The measurement standard uncertainty of spectral radiance of NIM are 0.95%, 0.50%, 0.41% and 0.80% at 250nm, 400nm, 800nm and 2500nm respectively.The comparison result verified the performance of NIMs new national standard apparatus of spectral radiance.
关键词
计量学 /
光谱辐射亮度 /
国际比对 /
高温黑体 /
测量不确定度 /
国家基准
Key words
metrology /
spectral radiance /
international comparison /
high temperature blackbody /
temperature measurement /
measurement uncertainty /
national primary standard
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基金
国家重点研发计划(2016YFF0200304)
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