Fig. 1. Measurement principle of radiation spot heat flux distribution

Fig. 2. Measurement principle of radiation flux distribution of spot at different positions

Fig. 3. 6kW xenon lamp spotlight experiment test platform

Fig. 4. Grayscale image of focused spot of xenon lamp

Fig. 5. Comparison of measurement results of radiant flux sensor with traditional indirect measurement results

Fig. 6. Relationship between gray and calibration factor

Fig. 7. Comparison of traditional indirect measurement, direct measurement and polynomial calibration measurement results

Fig. 8. Relative deviation of measurement results

Fig. 9. Calibration results of radiation flux sensor