Material: UVFS
Diameter: 50.8 mm (+0/-0.1 mm)
Thickness: 9.52 mm (+/-0.1 mm)
Clear aperture: min. 40 mm
Surface quality, S1: 20-10 S-D over CA (MIL-PRF-13830B)
Surface flatness, S1: λ/8@633 nm over any 20 mm, aperture
Surface S2: inspection polished (80-50 SD)
Parallelism: <5 arcmin
Protective chamfers: 0.3-0.8 mm x 45°
Coatings (IBS):
S1(arrow marks): HRa>99.9% @ 1070 nm + T > 75% @ 600 nm, AOI=45°
S2: uncoated
