Fig. 1. Composition of camera

Fig. 2. Optical system imaging model

Fig. 3. Contrastive MTF of lens

Fig. 4. Light blocking window design

Fig. 5. Finite element model of thermal simulation of whole camera

Fig. 6. Comparative temperature simulation diagram of mirror 8

Fig. 7. Improved temperature curve of mirror 8

Fig. 8. Simulation results of themal deformation of mirror and improved MTF of lens