Fig. 1. Schematic diagram of the telescope system. (a) Telescope optical system; (b) Primary mirror assembly

Fig. 2. Primary mirror lightweight model. (a) Support point layout; (b) Rib plate parameters; (c) Mirror thickness

Fig. 3. Relation between top angle of support and surface shape and rigid body displacement under different gravity directions. (a) Gravity force in the X-direction; (b) Gravity force in the Y-direction

Fig. 4. Topology optimization results of the backplane. (a) Initial backplane; (b) Topological result; (c) Optimized backplane

Fig. 5. Stress-strain diagram of the beam element

Fig. 6. Parameters of the flexible legs

Fig. 7. Schematic diagram of a single Bipod flexible support

Fig. 8. Schematic diagram of primary mirror’s flexible support

Fig. 9. Influence of structural parameters on the evaluation function

Fig. 10. The structure of the primary mirror assembly is deformed. (a) Finite element model; (b) Gravity condition; (c) Temperature condition; (d) Superposition condition

Fig. 11. Surface error of the primary mirror. (a) Gravity condition; (b) Temperature condition; (c) Superposition condition

Fig. 12. Structural stability of primary mirror assembly. (a) Temperature stability of the environment; (b) Dimensional stability of structure