9427942

Center thickness, mm: 3.91
Centration error: <3 arcmin
Clear aperture: 90
Dimensions tolerance, mm: +0.0/-0.1
Dimensions, mm: 12.9
Edge thickness, mm: 3.92
Material: N-BK7
Protective chamfers: 0.2-0.3 mm x 45°
ROC S1, mm: -2000
ROC S2, mm: ∞
ROC tolerance, %: ±1
S1 Surface figure, PV: <λ/8 @ 632.8 nm
S1 Surface quality, S-D: 20-10
S2 Surface figure, PV: <λ/8 @ 632.8 nm
S2 Surface quality, S-D: 20-10
Thickness tolerance, mm: +/-0.1