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为满足地面/空间辐射定标和太阳/大气遥感测量的应用需求,开发了一种基于Gershun管(光阑筒式结构)的高精度光谱辐射计。介绍了Gershun管光谱辐射计的设计,对其探测器光谱响应度、空间响应均匀性、角度响应特性和视场内外辐射响应特性进行了测试,将基于探测器标准的Gershun管光谱辐射计与基于光谱辐射光源标准的Gershun管光谱辐射计进行了比对,并分析了其标准不确定度范围。实验表明,Gershun管光谱辐射计的光谱响应度重复性为0.3%,区域响应度均匀性为0.3%,角度响应与余弦分布一致性为0.2%,视场外辐射抑制能力为2.1×10~(-4);Gershun管光谱辐射计与光谱辐射光源标准比对的标准不确定度为2.83%,实验测试结果与理论结果的一致性为0.17%。所设计的Gershun管光谱辐射计可以满足应用需求。
In order to meet the application requirements of ground / space radiation calibration and solar / atmospheric remote sensing measurement, a high-precision spectral radiometer based on Gershun tube (aperture barrel structure) has been developed. The design of Gershun tube spectroradiometer is introduced and its detector spectral responsivity, spatial response uniformity, angular response characteristic and radiation response inside and outside the field are tested. The Gershun tube spectral radiometer based on the detector standard is compared with the Gershun tube spectral radiometer The standard Gershun tube spectroradiometer, a spectral radiation source, was aligned and its standard uncertainty range was analyzed. Experiments show that the Gershun tube spectral radiometer has a spectral responsivity of 0.3%, a uniform regional response of 0.3%, an angular response of 0.2% and a cosine distribution of 0.2% and a field of view of 2.1 × 10 ~ -4). The standard uncertainty of the standard comparison between Gershun tube spectroradiometer and spectral radiation source is 2.83%. The consistency between experimental results and theoretical results is 0.17%. The design of the Gershun tube spectral radiometer to meet the application needs.