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Beamsplitter Cube
Material: BK7 grade A optical glass
Dimension Tolerance: +/-0.2mm
Surface Quality: 60-40 scratch and dig
Flatness: lambda/4 per 25mm @632.8nm
Angle Tolerance: <3 arc minutes
T/R:50/5015%, for natrual light, T=(Ts+Tp) /2, R=(Rs+Rp) /2
Coatings: Partial reflectance: on hypotenuse face
AR-coatings: on all input and output faces.