Specifications:
Material: BK7 grade A Optical Glass
Dimension Tolerance: ± 0.2mm
Surface Quality: 60-40 scratch and dig
T/R: 50/50 ± 5% for natural light
T/R: T = (Ts+Tp)/2 , R = (Rs + Rp)/2
Surface Flatness: 1/4 @ 632.8nm
Beam Deviation: < 3 arc minutes |