Nonlinearity measurements of spectral responsivity of Fourier transform infrared spectrometer measurement system based on flux superposition principle
投稿时间:2019-10-17  修订日期:2020-04-03  download
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宋旭尧 长春理工大学 理学院吉林 长春 130022 
端木庆铎 长春理工大学 理学院吉林 长春 130022 
董伟 中国计量科学研究院 热工计量科学研究所 
原遵东 中国计量科学研究院 热工计量科学研究所  
李志彬 长春理工大学 理学院吉林 长春 130022  
卢小丰 中国计量科学研究院 热工计量科学研究所  
曲岩 长春理工大学 理学院吉林 长春 130022  
Abstract:In infrared radiation temperature measurements of wide-dynamic, high-resolution and wide-spectrum, Fourier Transform infrared (FTIR) spectrometer is a commonly used measurement unit. The nonlinearity of the spectral responsivity is one of the main uncertainty contributions to wide dynamic infrared spectrum measurements of radiation sources. Based on the flux superposition principle, nonlinearity measurement system of FTIR spectrometer measurement system was established. The experimental research on the drift characteristics of the blackbody radiation source and FTIR spectrometer measurement system during the representative nonlinearity measurement time were carried out. The quasi-linear drift effects on the nonlinearity measurement were eliminated by permuting the aperture measurement order. The nonlinear characteristics of FTIR spectrometer measurement system were experimentally measured at 200~1 000℃. The nonlinearity measurement results and associated uncertainties at 3.9 μm and 10.6 μm are reported respectively.
keywords:metrology  nonlinearity  flux superposition principle  double-aperture method  Fourier Transform infrared spectrometer  blackbody radiation source
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Copyright:《Journal of Infrared And Millimeter Waves》