Non-polarizing Beamsplitter Cube consists of a pair of precision high tolerance right angle prisms cemented together with a dielectric coating on the hypotenuse of one of the prisms. The low polarization dependence of the dielectric coating allows the transmission and reflection for S- and P- polarization states to be within 5% of each other. This means that they will not change the state of polarization of the incident beam.
DELN offer both broadband and single wavelength non-polarizing cube beamsplitters (NPBS). An antireflective coating has beem applied to each face of the beamsplitter in order to produce maximum transmission efficiency for the appropriate wavelength range.
Specifications
Material
BK7
Dimension Tolerance
±0.1mm
Clear Aperture
>90%
Flatness
λ/4 @ 632.8nm to λ/10 @ 632.8nm per 25mm
Beam Deviation
±3 arc minutes to ±5 arc seconds
Surface Quality
60/40 or better
Absorption
<10%
Transmission
45%±5%
Polarization
<6%
Coating
Non-polarizing beamsplitter coating on hypotenuse face AR coating on all entrances
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