| Specifications | According to customer's specific requirements |
| Material | Optical-grade single-crystal sapphire (Al₂O₃) |
| Diameter Tolerance | +0.0/-0.1mm |
| Central Thickness Tolerance | ±0.1 mm |
| PV | λ/2 |
| Surface Quality | 60/40 |
| Centering Error | ≤30′′ |
| Coating | Custom Design |
