Fig. 1. Matrix structure of flame section

Fig. 2. Iterative parsing principle of equations

Fig. 3. Control unit of synchronous coupling system

Fig. 4. Work flow for synchronous coupling structure

Fig. 5. (a) Design drawing of multi-optical path acquisition system; (b) Physical system

Fig. 6. Testing field layout

Fig. 7. Calibration of medium temperature blackbody radiation source

Fig. 8. Calibration of high temperature blackbody radiation source

Fig. 9. Spectral response curves of CCD camera

Fig. 10. Flame grayscale map of R and G channels

Fig. 11. Three-dimensional slices of flame. (a) R channel; (b) G channel

Fig. 12. Average gray value sampling for radiation calibration

Fig. 13. Calibration curves for medium temperature blackbody radiation sources. (a) =650 nm; (b) =541.6 nm 中温黑体辐射源标定曲线。(a) =650 nm；(b) =541.6 nm

Fig. 14. Calibration curves for high temperature blackbody radiation sources. (a) =650 nm; (b) =541.6 nm 高温黑体辐射源标定曲线。(a) =650 nm；(b) =541.6 nm

Fig. 15. Emissivity of candle flame at different wavelengths

Fig. 16. Tomography of flame temperature field att₁

Fig. 17. Temperature slices of flame at the same height. (a) t₁; (b)t₂; (c) t₃; (d) t₄

Fig. 18. Three-dimensional temperature field tomography of the solid rocket motor exhaust plume

Fig. 19. Position of thermocouple temperature measurement