Cube beamsplitters are constructed by cementing two precision right angle prism together with appropriate interference coating on the hypotenuse surface. The absorption loss to the coating is minimal transmission and reflection approach 50% (average) though output is partially polarized. If polarization sensitivity is critical to your online_ordering, we recommended that you select from our Polarization Cube Beamsplitter or Non-polarization Cube Beamsplitter. 

Specifications : 

Material: BK7 grade A, optical glass 
Dimension Tolerance:±0.2mm 
Flatness:λ /4 @ 632.8 nm 
Surface Quality: 60-40 scratch and dig            
T/R: 50/50±5%, for random polarization    T=(Ts+Tp)/2, R=(Rs+Rp)/2 
Beam Deviation: <3 arc minutes 
Coating: 
Hypotenuse face:Partial reflectance 
All input and output faces: AR Coating 
Standard Coating wavelength: 
Narrow Band: 488, 532, 632.8, 650, 808, 850, 980, 1064, 1310, 1550 nm 
Broadband: 50-650, 650-900, 900-1200, 1200-1550, 1500-1610 nm

Custom designs for other sizes and coatings are also available upon request.