Non-Polarizing Plate Beamsplitters
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Non-Polarizing Plate Beamsplitters divide an incident, monochromatic beam into reflected and transmitted components with the specified intensity ratio. They are designed for applications in which it is necessary to maintain the polarization characteristics of the incident beam. The plate is coated on one side with an all dielectric, non-polarizing, partial reflection coating, and on the reverse side with a high efficiency, narrowband, anti-reflection coating.
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RMI Standard Specifications
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Angle incidence:
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45°
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| Materials: |
BK7, FS, UVFS, CaF2, ZnSe, Si, All Glass, All Crystals |
Surface Figure:
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Both surfaces:
λ/20 at 633 nm
λ/10 at 633 nm
λ/4 at 633 nm
λ/40 at 10.6 µm
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Surface Quality:
BK7, UVFS, FS:
CaF2:
ZnSe, Si:
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Both surfaces:
10-5
20-10
40-20 |
| Diameter Tolerance: |
+ 0.000", – 0.010" |
| Thickness Tolerance: |
± 0.010" |
| Wedge: |
≤ 3 arc minutes |
| Bevels: |
0.010" – 0.030" at 45º |
| Clear Aperture: |
Central 85% of diameter |
Reflectance:
λ < 2.0 µm
λ = 10.6 µm
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10% ≤ R ≤ 90% ± 3%
|Rs - Rp| ≤ 3%
R = 50% ± 5%
|Rs - Rp| ≤ 5%
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Anti-Reflection Coating:
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Unpolarized:
R ≤ 0.5% at 45º
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