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| Dimensional Tolerance | ±0.1mm |
| Angle Tolerance | ±2 Arcmin |
| Surface Flatness | 1/4 Lambda or 1/8Lambda |
| Surface quality | 60/40, 40/20 or better |
| Material | BK7/K9/UV fused silica |
| Clear aperture | >90% |
| Bevel | Protective bevel as needed |
| Coating | Custom |







