Fig. 1. Structural diagram of mirror subassembly

Fig. 2. Variation of adhesive strength with adhesive layer thickness

Fig. 3. Schematic of relationship between adhesive layer thickness and sleeve radius

Fig. 4. Finite element model. (a) Mirror subassembly; (b) sleeve; (c) local magnification of adhesive layer

Fig. 5. Adhesive layer stress curves under different thicknesses

Fig. 6. Cloud maps of static analysis. (a) X-direction gravity; (b) Y-direction gravity; (c) 4 ℃ temperature rise

Fig. 7. Deformation cloud map of mirror under adhesive layer contraction

Fig. 8. Flow chart of validation

Fig. 9. Surface shape of mirror

Fig. 10. Mechanical conditions of random vibration experiment

Fig. 11. Frequency-sweep curve in Z direction

Fig. 12. Surface shape of mirror after vibration experiment