Description
| Material | BK7 |
| Dimension Tolerance | +0.0/-0.2mm |
| Thickness | 2.0±0.2mm |
| Surface Quality | 80/50 scratch and dig |
| Clear Aperture | >90% |
| Flatness | <2λ@632.8nm |
| Parallelism | <5 arc minutes |
| Chamfer | Protective<0.5mmx45° |
| Coating | Metallic reflective coating |
| OD Tolerance | OD±10%@Design Wavelength |
