Fig. 1. Schematic of optical system

Fig. 2. Component structures of original mirror

Fig. 3. Surface shape solving process based on DRESP2

Fig. 4. Iterative convergence curve and optimization result. (a) Iterative convergence curve; (b) SIMP topology optimization result

Fig. 5. Structural parameters of mirror assembly. (a) Vertical view of mirror; (b) section view of mirror; (c) vertical view of athermal cone

Fig. 6. Flow chart of integrated optimization platform processing

Fig. 7. Iterative curves after optimization in different situations. (a) RMS values of surface shape at +4 ℃; (b) RMS values of gravity surface in x direction; (c) mass of reflector component; (d) eccentricity of x-gravity condition; (e) eccentricity of y-gravity condition; (f) eccentricity of z-gravity condition; (g) x-tilt of gravity condition; (h) y-tilt of gravity condition

Fig. 8. Surface shape analysis results under different conditions. (a) x-gravity condition; (b) 4 ℃ temperature rise

Fig. 9. Camera mechanical vibration test platform

Fig. 10. Sine frequency sweep test data. (a) x-direction sine sweep; (b) y-direction sine sweep; (c) z-direction sine sweep

Fig. 11. Surface interference detection site

Fig. 12. Test results of mirror before and after test. (a) Before test; (b) after test

Table 1. Performance indicators of common space camera materials

Table 2. Optimal parameter combination results

Table 3. Optimize analysis results

Table 4. Frequency comparison in different situations