| Material |
BK7, Fused Silica and other optical glasses |
| Dimension Tolerance |
+0.0/-0.1mm |
| Clear Aperture |
>90% |
| Angle Tolerance |
Up to 10 arc seconds |
| Roof Angle Tolerance |
Up to 5 arc seconds |
| Flatness |
Up to λ/10@632.8nm |
| Surface Quality |
Up to 20/10 scratch and dig |
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