| Milbond | ||
1# | 2# | 3# | |
Surface figure error before bonding (λ) | 0.011 | 0.015 | 0.011 |
Surface figure error of 9 days after bonding (λ) | 0.040 | 0.039 | 0.040 |
Surface figure error after vacuum and three thermal cycles (λ) | 0.255 | 0.219 | 0.211 |