Fig. 1. Initial optical path structure

Fig. 2. Topology parameter optimization process

Fig. 3. SMIP sketch map

Fig. 4. Pseudo density matrix

Fig. 5. Optical path structure details.（a）Topology details after 9 iterations；（b）topology details after 16 iterations

Fig. 6. Skeleton of optical path supporting structure after topology optimization.（a）After 9 iterations；（b）after 16 iterations

Fig. 7. Optimized double-layer structure

Fig. 8. Meshing of light path support structure.（a）Overall structure；（b）determination of design domain of meshing

Fig. 9. Structural finite element analysis.（a）Optimized skeleton details；（b）material distribution of details after topology optimization；（c）grid marking and meshing of details；（d）meshing of overall structure

Fig. 10. Optimization of detailed structure of main mirror support.（a）Support structure for optical lenses；（b）enlarged view of support structure grid

Fig. 11. Final configuration of optical device support

Fig. 12. Flow chart of performance optimization

Fig. 13. Optimized skeleton after iteration

Fig. 14. Effects of supporting optical lens.（a）Optimization result after 19 iterations；（b）optimization result after 26 iterations；

Fig. 15. Curve of optimizatione effect