Fig. 1. Distribution of support holes on back of mirror

Fig. 2. Cloud images of support radius

Fig. 3. Curves of support radius

Fig. 4. Structures of different lightweight hole mirrors

Fig. 5. Back reinforcement bar label

Fig. 6. Cloud image of size optimization results

Fig. 7. Image of topology optimization results

Fig. 8. Iteration results

Fig. 9. 3D model after topology optimization

Fig. 10. Mirror fixture structure

Fig. 11. Single-point diamond turning mirror processing site

Fig. 12. Surface shape test results