CUSTOMIZED
Substrate material: UVFS
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 over CA (MIL-PRF-13830B)
Surface flatness, S1/S2: <λ/8 @ 633 nm any 5 mm aperture within CA
Parallelism: <5 arcmin
Protective chamfers: 0.2-0.4 mm x 45 deg
Chips: <0.2 mm x 45 deg
Coatings (IBS):
S1(arrow marks): HRs>99.5% & HRp>99.2% @ 257 nm, AOI=45° (low GDD)
S2: uncoated
