Fig. 1. Schematic of spectral emissivity measurement

Fig. 2. Schematic of spectral emissivity calibration device

Fig. 3. Structure diagram of spectral emissivity calibration device

Fig. 4. Structure diagram of spectral spectrometer module

Fig. 5. Block diagram of infrared detector signal processing module

Fig. 6. Samples of brass, stainless steel (smooth), and stainless steel (rough)

Fig. 7. Measurement results of spectral emissivity for calibration device