| Material: |
BK7, B270, Float Glass, FS, UVFS, Ge, CaF2, MgF2, Sapphire or others |
| Dimension Tolerance: |
+0.0/-0.2mm (Standard), +0.0/-0.1mm (High Precision) |
| Tc Tolerance: |
±0.3mm (Standard), ±0.1mm (High Precision) |
| Clear Aperture: |
85% (Standard), 90% (High Precision) |
| Surface Quality: |
60-40 S-D (Standard), 20-10 S-D (High Precision) |