CUSTOMIZED
Material: UVFS (Corning 7980 0F)
Diameter: 25.4 mm (+0/-0.1 mm)
Thickness: 6.35 mm (+/-0.1 mm)
Clear aperture: min 20 mm
Surface quality, S1/S2: 20-10 S-D
Surface flatness, S1/S2: <λ/8 @ 633 nm over any 12 mm round aperture within CA
Parallelism: <10 arcsec
Protective chamfers: 0.1-0.4 mm x 45 deg
Chips: <0.2 mm
Arrow marks S1
Coatings (IBS):
S1 (arrow marks): HRsp>90% @ 440 nm, Tsp>85% (best effort >90%) @ 450 nm. AOI 22.5 deg
S2: ARsp<0.1% @ 450 nm. AOI 22.5 deg
