Fig. 1. Schematic diagram of static interference high-temperature temperature field detection based on a Savart prism

Fig. 2. The optical path diagram of Savart prism static interference temperature field detection

Fig. 3. (a) Normalized interference signal diagram of the high temperature black body (or gray body) at different temperatures; (b) enlarged drawing of the area marked in (a)

Fig. 4. The relationship between the lowest optical path difference ΔL_min of the interference signal and the temperature of the measured target

Fig. 5. The relationship between lowest optical path difference ΔL_min and the measured target temperature and the fitting error

Fig. 6. The high-temperature temperature field and the interference image obtained by the area array detector

Fig. 7. Comparison of the measured temperature and original incident temperature

Fig. 8. Relative error of the measured temperature