08 Nov 2021
Polarizing Cube Beamsplitters split randomly polarized beams into two orthogonal,linearly,polarized components. S-polarized light is reflected at a 90deg.Angle while P-polarized light is transmitted. Each beamsplitter consists of a pair of precision high tolerance right angle prisms cemented together with a dielectric coating on the hypotenuse of one of prisms.
| Material |
BK7 glass |
| Dimension Tolerance |
±0.2mm |
| Extinction Ratio |
>100:1 for broadband, >500:1 for narrow band |
| Surface Quality |
60/40,40/20 or Better |
| Clear Aperture |
>90% |
| Beam Deviation |
<3 arc minutes |
| Flatness |
λ/4 at 632.8nm per 25mm |
| Principal Transmittance |
Narrow: Tp>95% and Ts<1%
Broad: Tp>90% and Ts<1% |
| Principal Reflectance |
Narrow: Rs>99% and Rp<5%
Broad: Rs>99% and Rp<10% |
| Coating |
Polarization beamsplitter coating on hypotenuse face
AR coating on all input and output faces |
| Damage Threshold |
>500mJ/cm2, 20ns, 20Hz, @1064nm |
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