| 基于热红外标准辐亮度计的常温黑体定标技术 |
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| 引用本文： | 徐骏,孟炳寰,翟文超,丁蕾,郑小兵.基于热红外标准辐亮度计的常温黑体定标技术[J].红外与激光工程,2014,43(3):716-721. |
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| 作者姓名： | 徐骏 孟炳寰 翟文超 丁蕾 郑小兵 |
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| 作者单位： | 1.中国科学院安徽光学精密机械研究所中国科学院通用光学定标与表征技术重点实验室,安徽合肥230031 |
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| 基金项目： | 安徽省自然科学基金(090412042);中科院安徽光学精密机械研究所所长基金(Y03AG31145) |
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| 摘 要： | 常温黑体作为红外光电探测系统的定标光源，其辐亮度的不确定度直接决定了被定标红外系统的探测精度。为了提高黑体的现场定标精度，采用标准辐亮度计开展了面型和腔型结构的三种黑体的辐射定标实验研究。标准辐亮度计溯源于国家计量院标准黑体，不确定度为0.22%。通过直接测量三种黑体的绝对辐亮度，获得了辐亮度温度，并进一步导出了发射率。结果表明，三种黑体的设置温度与其辐亮度温度存在0.6~2.6 K 的差异，由此产生的绝对辐亮度的不确定度达1.4%~5.5%。基于标准辐亮度计的直接定标法避免了温度和发射率测量引入的不确定度，有利于实现黑体现场系统级定标和绝对辐亮度监测。
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| 关 键 词： | 热红外标准辐亮度计 黑体 定标 发射率 |
| 收稿时间： | 2013-07-07 |
Calibration of common temperature blackbody based on thermal-infrared standard radiometer |
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| Affiliation: | 1.Key Laboratory of Optical Calibration and Characterization,Anhui Institute of Optics and Fine Mechanical,Chinese Academy of Sciences,Hefei 230031,China |
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| Abstract: | Radiance uncertainties of common temperature blackbodies determine the detection accuracy of infrared optoelectronic dectetor systems. To improve the on-site calibration accuracy of blackbodies'radiance, a standard radiometer was used to calibrate three blackbodies, including one cavity blackbody and two surface blackbodies. The standard radiometer was traced to a standard blackbody hold by National Institute of Metrology of China and obtain a uncertainty of less than 0.22%. Brightness temperatures and effective emissivities were acquired by measuring three blackbodies'radiance directly. The results show deviations of 0.6 K to 2.6 K between brightness temperatures and setting temperatures for all three blackbodies, which correspond to absolute radiance uncertainties from 1.4% to 5.5%. The direct calibration method based on standard radiometer avoids the uncertainties from measurements of temperature and emssivity, and can be used to realize on-site system-level calibrations of blackbodies and absolute radiance monitoring. |
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