Pulli Tomi, Nevas Saulius, El Gawhary Omar, van den Berg Steven, Askola Janne, Kärhä Petri, Manoocheri Farshid, Ikonen Erkki
Appl Opt. 2017 Apr 10;56(11):3077-3086. doi: 10.1364/AO.56.003077.
Array spectroradiometers are attractive alternatives to scanning spectroradiometers in solar ultraviolet measurements. However, the measurement of solar spectral irradiance imposes stringent requirements for the linearity of the instruments. In this article, two array spectroradiometers were characterized for nonlinearity. Significant nonlinearities, in excess of 10%, as a function of analog-to-digital converter counts were discovered. Additional nonlinearities as a function of integration time were observed at very long integration times. No clear residual nonlinearity as a function of spectral irradiance was witnessed despite the characterization spanning four orders of magnitude of spectral irradiance. The characterizations were carried out with three measurement setups that are briefly compared.
在太阳紫外线测量中，阵列光谱辐射计是扫描光谱辐射计颇具吸引力的替代方案。然而，太阳光谱辐照度的测量对仪器的线性度提出了严格要求。在本文中，对两台阵列光谱辐射计的非线性特性进行了表征。发现了与模数转换器计数值相关的显著非线性，超过了10%。在非常长的积分时间下，还观察到了与积分时间相关的额外非线性。尽管表征涵盖了四个数量级的光谱辐照度，但未发现与光谱辐照度相关的明显残余非线性。使用三种测量设置进行了表征，并对它们进行了简要比较。
