Fig. 1. Imaging process

Fig. 2. Calibration of various spectral bands at the same temperature point

Fig. 3. Simulation of nonlinear detector response relationships

Fig. 4. Simulation of the s-e relationship in the detector response to 17 bands

Fig. 5. Comparison of division results（relative standard deviation 1%）

Fig. 6. Comparison of the results of the two methods divided into 10 segments

Fig. 7. Nonlinear response curves for 17 spectral bands classified by the standard deviation method

Fig. 8. Comparison of calibration results of different number of calibration temperature points

Fig. 9. Experiment for acquiring infrared radiation

Fig. 10. Standard deviation method division and linear fitting result