光学学报, 2020, 40 (5): 0530002, 网络出版: 2020-03-10 复制并引用该论文  本文已被引 1 次  被引通知

图 & 表

图 1. 理想光谱示意图

Fig. 1. Diagrammatic sketch of an ideal spectrum

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图 2. 傅里叶变换光谱仪观测低温黑体的原始未标定光谱图

Fig. 2. Raw spectrum of a low-temperature blackbody observed by FTS

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图 3. 傅里叶变换光谱仪观测不同温度下黑体的光谱图

Fig. 3. Measured spectra of the external blackbody at different temperatures observed by the FTS

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图 4. 傅里叶变换光谱仪未标定光谱与黑体辐亮度响应关系。(a)动态范围低端; (b)动态范围高端

Fig. 4. Response relationship between uncalibrated spectra and blackbody radiances observed by FTS. (a) Lower range; (b) higher range

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图 5. 傅里叶变换光谱仪观测不同温度下外部黑体的相对系数计算结果。 (a) 7 ℃; (b) 17 ℃; (c) 22 ℃; (d) 27 ℃; (e) 32 ℃; (f) 37 ℃; (g) 42℃; (h) 52 ℃

Fig. 5. Relative coefficients calculation corresponding to measured spectra of the external blackbody observed by FTS at different temperatures. (a) 7 ℃; (b) 17 ℃; (c) 22 ℃; (d) 27 ℃; (e) 32 ℃; (f) 37 ℃; (g) 42℃; (h) 52 ℃

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图 6. 傅里叶变换光谱仪未标定光谱与黑体辐亮度响应关系。(a)非线性校正前; (b)非线性校正后

Fig. 6. Response relationship between uncalibrated spectra and blackbody radiances. (a) Before nonlinearity correction; (b) after nonlinearity correction

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图 7. 校正前后的光谱对比

Fig. 7. Comparison of original and corrected spectra

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图 8. 非线性校正后47 ℃黑体观测数据基于线性辐射定标的辐亮度偏差。(a)偏差;(b)相对偏差

Fig. 8. Radiance bias of the 47 ℃ blackbody radiance based on linear radiometric calibration after nonlinearity correction. (a) Bias; (b) relative bias

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图 9. 非线性校正后27 ℃黑体观测数据基于线性辐射定标的辐亮度偏差。(a)偏差;(b)相对偏差

Fig. 9. Radiance bias of the 27 ℃ blackbody based on linear radiometric calibration after nonlinearity correction. (a) Bias; (b) relative bias

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图 10. -3 ℃黑体观测数据基于线性辐射定标的辐亮度偏差。(a)偏差;(b)相对偏差

Fig. 10. Radiance bias of the -3 ℃ blackbody based on linear radiometric calibration. (a) Bias; (b) relative bias

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表 1相对系数计算中拟合优度

Table1. Goodness of fit in the relative coefficients calculation

Temperature of external blackbody /℃ R2 k 7 0.9520 0.002025 17 0.9794 0.002081 22 0.9845 0.002117 27 0.9897 0.002183 32 0.9930 0.002250 37 0.9949 0.002325 42 0.9965 0.002392 52 0.9976 0.002560

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表 2图6中所示的典型波数通道对应的线性拟合的拟合优度

Table2. Goodness of linear fit corresponding to the typical wavenumber channel shown in Fig. 6

Wavenumber /cm-1 Before correction After correction 1269 0.990493 0.999993 1362 0.991194 0.999997 1455 0.991103 0.999992 1548 0.991715 0.999996 1641 0.991664 0.999985 1733 0.991451 0.999965

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郭玲玲, 赵其昌, 杨勇, 何军, 张扬. 傅里叶变换光谱仪的红外探测器非线性校正[J]. 光学学报, 2020, 40(5): 0530002. Lingling Guo, Qichang Zhao, Yong Yang, Jun He, Yang Zhang. A Nonlinearity Correction Method for the Response Produced by the Infrared Detectors of the Fourier Transform Spectrometers[J]. Acta Optica Sinica, 2020, 40(5): 0530002.