Substrate Material: UVFS Corning 7980 0F
Diameter: 25.4 mm +0/-0.1 mm
Edge Thickness: 6.35 mm +/-0.1 mm
Coated aperture: ~ 23.6 mm
Clear aperture: min 22.86 mm
Surface quality, S1: 10-5 S-D per CA
Surface quality, S2: Commercial polish (80-50 S-D per CA)
Surface flatness, S1: λ/8 or better @ 633 nm over 20 mm aperture.
Surface irregularity, S1: <λ/10 @ 633 nm per CA
Parallelism: < 3 arcmin
Protective chamfer: 0.1-0.4 mm x 45 deg
Chips: <0.25 mm stoned
Coatings (IBS):
S1 (arrow marks): Rs_ABS > 99.9% @ 355nm @ 45° AOI
S2: Uncoated
LIDT: 7.5 J/cm² @ 355nm @ 20ns @ 20Hz
