9577827

ROC S1: 77.169 mm (±0.1 %)
Center thickness, mm: 3 mm (±0.1 mm)
Sruface quality:
S2: uncoated
S2: fine ground
S1: Protected Aluminum, Ravg> 85% @ 40nm - IR
S1: 60-40
ROC S2: flat
Irregularity S1: 2fr @ 633 nm
Hole diameter: 10mm (±0.2 mm)
S1 Flatness, PV IR S2 Flatness, PV: 5fr @ 633nm, PWR
Diameter, mm: 27 mm (+0/-0.03 mm)
Coating:
Clear aperture: >Ø25mm
Centerness: <0.03 mm ETV
Material: Schott N-KF9
Chamfer: 0.3-0.5 mm x 45°