Fig. 1. Infrared detection system composition and detection

Fig. 2. Constraints of background and integration time

Fig. 3. Constraints of target and integration time

Fig. 4. Method of integration time selection

Fig. 5. Background intensity with the sun altitude

Fig. 6. Adaptive adjustment process of the integration time

Fig. 7. Double boundary optimization strategy of adaptive integration time

Fig. 8. Simulation results in different integration time

Fig. 9. Target energy test result of double exposure

Fig. 10. Simulation input

Fig. 11. Output with adaptive integration time

Fig. 12. Target response output result