Material |
K9 |
Diameter |
17.5mm 25.4mm 38.1mm |
Dimension Tolerance |
±0.1mm |
Surface Quality |
60-40 |
Surface Flatness |
λ/4@632.8nm |
180°Deviation Toleranc |
<8 arc seconds |
Clear Aperture |
>90% |
Bevelling |
0.25mm*45 degree |
Coating |
Three Reflected Surfaces are coated with copper
|