9780138

Diameter, mm: 12.7 (+0/-0.1mm)
Surface quality: 20-10 S-D
Material: UVFS (Corning 7980 0F)
Edge thickness, mm: 5 (+/-0.1mm)
Clear aperture: >90%
Chamfer: 0.2 - 0.4 mm @ 45°
Centration error: <3 arcmin
S1 Flatness, PV IR S2 Flatness, PV: L/4 @ 633nm per CA