Calibration and investigation of infrared camera systems applying blackbody radiation
Calibration and investigation of infrared camera systems applying blackbody radiation
复制标题
应用黑体辐射的红外相机系统的校准和研究
DOI：
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发表时间：
2001
期刊：
影响因子：
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通讯作者：
J. Fischer
中科院分区：
文献类型：
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作者：
J. Hartmann;J. Fischer
提出了一种实验装置，它允许红外摄像机系统的校准和详细的调查。在-60摄氏度至3000摄氏度的温度范围内工作的各种黑体可作为标准辐射源，从而能够在宽温度和光谱范围内以最高精度校准相机系统。定量结果和精确的长期调查，特别是在探测气候趋势方面，需要精确地追溯到1990年国际温标（ITS-90）。对于所使用的黑体，通过标准铂电阻温度计（在低于962摄氏度的温度范围内）或通过绝对和相对辐射测量法（在高于962摄氏度的温度范围内）实现对ITS- 90的可追溯性。这种可追溯性是实施质量保证体系和实现不同认证的基础，例如根据ISO 9000。为了研究角度和温度分辨率，我们的设置可以在各种温度范围内进行最小可分辨（MRTD）和最小可检测温差（MDTD）测量。准直器系统可用于将MRTD和MDTD目标成像到无限远。由于红外摄像机系统的内部校准主要取决于周围环境的温度，因此摄像机的校准和研究是在气候箱中进行的，这允许对湿度和温度等环境参数进行详细控制。不同的相机系统获得的实验结果，并进行了讨论。
An experimental facility is presented, which allows calibration and detailed investigation of infrared camera systems. Various blackbodies operating in the temperature range from -60 degree(s)C up to 3000 degree(s)C serve as standard radiation sources, enabling calibration of camera systems in a wide temperature and spectral range with highest accuracy. Quantitative results and precise long-term investigations, especially in detecting climatic trends, require accurate traceability to the International Temperature Scale of 1990 (ITS-90). For the used blackbodies the traceability to ITS- 90 is either realized by standard platinum resistance thermometers (in the temperature range below 962 degree(s)C) or by absolute and relative radiometry (in the temperature range above 962 degree(s)C). This traceability is fundamental for implementation of quality assurance systems and realization of different standardizations, for example according ISO 9000. For investigation of the angular and the temperature resolution our set-up enables minimum resolvable (MRTD) and minimum detectable temperature difference (MDTD) measurements in the various temperature ranges. A collimator system may be used to image the MRTD and MDTD targets to infinity. As internal calibration of infrared camera systems critically depends on the temperature of the surrounding, the calibration and investigation of the cameras is performed in a climate box, which allows a detailed controlling of the environmental parameters like humidity and temperature. Experimental results obtained for different camera systems are presented and discussed.