Material Zerodur glass or zero-expansion substitute
Dia tolerance (inch) | +0, -0.005 |
Dia tolerance (inch) | +0, -0.005 |
Dia tolerance (mm) +0, -0.13
Center Thickness tolerance ±0.010” (±0.25 mm)
Clear Aperture 85% Central Diameter
Parallelism 3 arc min
Surface Accuracy 1/4 wave at 633 nm
Surface Quality 40/20
Coating Protected Chromium-Gold