CUSTOMIZED
Material: UVFS (Corning 7980 0F)
Diameter: 20.0 mm (+0/-0.02 mm)
Central thickness: 3.0 mm (+/-0.1 mm)
Clear aperture: min. 18 mm centered
Surface quality, S1/S2: 20-10 S-D over CA as per MIL-PRF-13830B
Surface irregularity, S1/S2: <λ/4@633 nm over CA
ROC tolerance: 1 fringe (N≤1 test plate)
ROC S1(CV): -86.59 mm
ROC S2(CV): -30.0 mm
Centration error: <1 arcmin
Protective chamfers: 0.2-0.3 mm x 45deg, made with compound wheel. Centered <1`
Chip: <0.25mm stoned
Coating (IBS):
S1 (arrow mark): AR<0.2% @ 343 nm, AOI 0 deg
S2: AR<0.2% @ 343 nm, AOI 0 deg
