Fig. 1. Schematic diagram of polarization imaging of target in thermal radiation environment

Fig. 2. Schematic diagram of azimuth relation in bidirectional reflection distribution function model

Fig. 3. Schematic diagram of thermal radiation transfer model

Fig. 4. Polarization characteristics of reflected thermal radiation. (a) R_S and R_P varying with observation angle; (b) DOLP varying with observation angle

Fig. 5. Polarization characteristics of spontaneous thermal radiation. (a) ε_S and ε_P varying with observation angle; (b) DOLP varying with observation angle

Fig. 6. R_S and R_P varying with observation angle under different α. (a) α<1.0; (b) α>1.0

Fig. 7. Simulation results of DOLPs of target in thermal radiation environment. (a) α<1.0; (b) α>1.0

Fig. 8. Change law of infrared DOLP when temperature of alloy plate is 30 ℃

Fig. 9. Change law of infrared DOLP at different alloy plate temperatures. (a) 50 ℃; (b) 70 ℃