Fig. 1. Rosette scanning optical system

Fig. 2. Temperature variation with time

Fig. 3. Simulation flow chart

Fig. 4. Sensor received energy( Temperature of guard is 293 K)

Fig. 5. Partial enlargement of the propagation path of stray lights

Fig. 6. Sensor received energy after revising filter

Fig. 7. Temperature belts of the dome

Fig. 8. Radiation energy received by sensor when dome temperature is distributed gradiently

Fig. 9. Dome 500 K, the incident light flux on the sensor surface when secondary mirror rotates and the tilted lens is fixed

Fig. 10. Dome 500 K, the incident light flux on the sensor surface when tilted lens rotates and the secondary mirror is fixed