Kunzhu Xiang, Hailiang Shi, Xiongwei Sun, Feng Zhu, Xianhua Wang, Hanhan Ye. Radiometric Calibration of Circular Variable Filter Type Spectroradiometer[J]. Acta Optica Sinica, 2023, 43(23): 2312001
- Acta Optica Sinica
- Vol. 43, Issue 23, 2312001 (2023)
Fig. 1. Principle of spectrum split based on CVF
Fig. 2. Lightpath diagram of CVF type spectroradiometer
Fig. 3. Blackbody emissivity
Fig. 4. Diagram of experimental system
Fig. 5. Flow diagram of data processing
Fig. 6. Spectra of blackbody at different temperatures. (a) Band of InSb detector; (b) band of MCT detector
Fig. 7. Responsibility curves of blackbody at 200 ℃. (a) Band of InSb detector; (b) band of MCT detector
Fig. 8. Gas transmittance curves. (a) CO2; (b) H2O
Fig. 9. Comparison of responsibility curves before and after atmospheric absorption rejection. (a) Before rejection; (b) after rejection
Fig. 10. Measured responsibility at 4.515 μm and 11.560 μm at different calibration temperatures
Fig. 11. Comparison of measured and theoretical radiance of blackbody at 200 ℃
Fig. 12. Relative errors in radiometric calibrations at different blackbody temperatures. (a) Band of InSb detector; (b) band of MCT detector
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Table 1. Specification for four-segment of CVF
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Table 2. Specification of CVF type spectroradiometer
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Table 3. Equivalent temperature calculation and error results
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