26 Sep 2023 specification:
| Material |
BK7, Fused Silica,Ge,Si, CaF2. |
| Diameter |
2-300mm |
| Flatness |
1/4lambda or better |
| Diameter Tolerance |
+0.01, -0.01 mm |
| Thickness Tolerance |
±0.1 mm |
| Paraxial Focal Length |
±2% |
| Centration |
<3 arc minutes |
| Clear Aperture |
>85% |
| Surface Quality |
60-40 scratch and dig or better |
| Protective Bevel |
0.25 mm x 45° |
| Coating: |
Specified by customers |
| Angle tolerance |
+/-30 seconds |
|