Regular Plate Beamsplitters
1. Substrate
- Material: UV fused silica or BK-7 window
- Clear Aperture: Larger than central 85% of diameter
- Surface Quality: 10-5 Scratch-Dig
- Diameter Tolerance: +0.000 / -0.010" (0.00 / -0.25mm)
- Thickness Tolerance: ±0.010" (±0.25mm)
- Bevel: < 0.5mm @ 45° typical
- Wedge: ≤ 5arcmin
2. Other specifications
- Coating: e-beam multilayer dielectric
- Angle of incidence: 45°
- 2nd surface: Anti-reflection coating
- Damage Threshold: 10 J/cm2, 20ns, 20Hz; 1 MW/cm2, CW @ 1064nm
In some applications, cube beamsplitters are not appropriate, and instead, plate-type splitters are employed. For the highest levels of wavefront fidelity and power handling, conventional coated BK7 or fused silica plates are excellent choices. Spectral Optics provides various R/T ratio regular plate beamsplitters coated with an all-dielectric coating. They have almost no absorption and are designed for 45° (or other angles of incidence) at a specific wavelength and a polarization (S-pol, P-pol, or unpol). The 2nd side of the window has an anti-reflection coating. Please click HERE for the polarizing plate beamsplitters.
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[RPBS]-[λ]-[R]-[AOI & Pol]-[Size]-[Material] |
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|---|---|---|---|---|---|---|
[RPBS] |
λ (nm) |
R (%) |
AOI & POL |
Size Code |
Material |
Price ($ USD) |
| [248], [266], [308], [337], [355], [400], [488], [532], [633], [670], [780], [800], [850], [980], [1030], [1064], [1319], [1550], [1850], etc. |
[20] (±5), [30] (±5), [40] (±5), [50] (±5), [60] (±5), [70] (±5), [80] (±5), [90] (±3), [95] (±2), [98] (±1), [99] (±0.5), etc. |
[45S], [45P], [45U], etc. |
[1025] (1.0" X 0.25") |
FS | $310 (< 300nm) $280 (< 400nm) $220 (≥ 400nm) |
|
| BK | $200 (≥ 400nm) | |||||
| [1525] (1.5" X 0.25") |
FS | $365 (< 300nm) $330 (< 400nm) $260 (≥ 400nm) |
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| BK | $235 (≥ 400nm) | |||||
| [2025] (2.0" X 0.25") |
FS | $450 (< 300nm) $400 (< 400nm) $300 (≥ 400nm) |
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| BK | $270 (≥ 400nm) | |||||
| [3050] (3.0" X 0.50") |
FS | Contact Us | ||||
| BK | $670 (≥ 400nm) | |||||
| [4050] (4.0" X 0.50") |
FS | Contact Us | ||||
| BK | $995 (≥ 400nm) | |||||
Example: RPBS-248-50-45U-1025-FS
Plate Beamsplitter + 248 + 50% (± 5%) R + 45° Unpolarization + 1.0" dia x 0.25" T + Fused Silica
NOTE:
1. The selection of the substrate material is dependent on the wavelength. Below 400nm, UV fused silica is recommended.
2. Any other wavelengths and R/T ratios can be supplied on request.
3. Other angles of incidence are also available.
4. Please describe your custom requirements when you contact us.