Fig. 1. High temperature measurement scene during engine test

Fig. 2. High temperature measurement scene of boiler superheater in power plant

Fig. 3. High temperature measurement scene for thermal test of high temperature structures

Fig. 4. Measurement of high temperature surface temperature under diffuse medium conditions

Fig. 5. Spectral absorption characteristics of main gas components in the tail flame medium

Fig. 6. Spectral transmittance of H₂O gas at different temperatures

Fig. 7. Spectral transmittance of water vapor at different number densities

Fig. 8. Spectral transmittance of water vapor under different average particle sizes

Fig. 9. Device to study the effect of water vapor on surface temperature measurement of high temperature billet^[24]

Fig. 10. Calculation of the effect of water vapor on thermometry measurement based on thermal radiation transfer theory^[28]

Fig. 11. Scene radiation information retrieval based on scattering model and information restoration^[35]

Fig. 12. Radiation thermometry based on three-channel detection in water vapor medium

Fig. 13. Retrieval of target temperature based on neural network