Plate beamsplitters
Description
Plate beamsplitters are considerably lighter and cheaper than the traditional cubes, and avoid the problem of stray light back-reflected from the entry and exit faces. Our Precision and Standard ranges both have dielectric multilayer coatings giving excellent durability and neutrality and much less affected by temperature changes than ordinary evaporated coatings. The spurious reflection from the back surface is almost eliminated by multilayer AR coating.
The Precision range comprises optically polished BK7 substrates flat to λ/4: these are suitable for all but the most exacting imaging applications. Plates in the Standard range are prepared as large sheets, allowing us to offer a wide range of good quality (satisfactory for most purposes) at a very reasonable cost. We can also provide special sizes, both larger and smaller, at very short notice. The Economy range has a single-layer dielectric (TiO2) beamsplitting coating, without AR on the reverse, and offers very large sizes at low cost.
Coating Specification
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Angle |
45o |
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Visible 50% |
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Reflectance |
50 ± 5% |
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Wavelength |
450-700nm |
|
AR Coating |
R < 1.2% average |
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Visible 33% |
|
|
Reflectance |
33 ± 5% |
|
Wavelength |
450-700nm |
|
AR coating |
R < 0.6% average |
|
VIS/NIR 50% |
|
|
Reflectance |
50 ± 6% |
|
Wavelength |
530-1070nm |
|
AR coating |
R < 0.9% average |
|
NIR/Telecom 50% |
|
|
Reflectance |
50 ± 5% |
|
Wavelength |
1070-1650nm |
|
AR coating |
R < 0.6% average |
|
Economy |
|
|
Reflectance |
40% nom. (visible) |
|
Polarisation ratio |
Rs/Rp = 2 (approx. for all types) |
Substrate specification
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Precision range: |
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Flatness (both sides) |
λ/4 over 90% of aperture size |
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Diameter |
+0, -0.1mm |
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Length, width |
±0.1mm |
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Thickness |
±0.1mm |
|
Scratch-dig |
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Material |
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Standard and Economy ranges: |
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Flatness (typical): |
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1mm thick |
0.5-1.5λ over Ø10mm |
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3mm thick |
1-2λ over Ø25mm |
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Diameter |
+0, -0.2mm |
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Length, width |
±0.3mm (≤100mm) |
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±0.5mm (>100mm) |
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|
Thickness |
±0.2mm |
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Scratch-dig |
|
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Material |
B270(NIR range) |
|
Float glass (others) |
- Mounting in camera filter rings (see Camera lens and camera filter holders)
- Cutting or edging to special sizes
- Larger sizes are available from stock sheets
For more details of your modification needs please enquire.
- Highly efficient, hard, all-dielectric coatings
- All (except Economy range) multi AR coated on the back surface
| Item code | Size (mm) | Thickness (mm) | Wavelength range (nm) | Reflectivity | Range | Flatness | Price per item (£ GBP) |
Stock available | Volume discount available |
Datasheets & customisation options |
Select amount |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 16 BQ 10 | 16 x 10 | 3 | 450-700nm (visible) | 50% | Precision | λ/4 (90% aper.) | £44.89 | ||||
| 63 BN 40 | 63 x 40 | 3 | 530-1070nm (visible/ NIR) | 50% | Standard | 1-2λ per Ø25 | £66.31 | ||||
| 16 BX 10 | 16 x 10 | 3 | 1070-1650nm (NIR/ telecom) | 50% | Precision | λ/4 (90% aper.) | £51.30 | ||||
| 25 BX 00 | 25 dia. | 4 | 1070-1650nm (NIR/ telecom) | 50% | Precision | λ/4 (90% aper.) | £66.91 | ||||
| 25 BX 16 | 25 x 16 | 4 | 1070-1650nm (NIR/ telecom) | 50% | Precision | λ/4 (90% aper.) | £60.86 | ||||
| 40 BX 25 | 40 x 25 | 6 | 1070-1650nm (NIR/ telecom) | 50% | Precision | λ/4 (90% aper.) | £92.20 | ||||
| 50 BX 00 | 50 dia. | 6 | 1070-1650nm (NIR/ telecom) | 50% | Precision | λ/4 (90% aper.) | TBA | Send us a stock query | |||
| 63 BX 40 | 63 x 40 | 8 | 1070-1650nm (NIR/ telecom) | 50% | Precision | λ/4 (90% aper.) | £138.79 | ||||
| 10 BV 06 | 10 x 6.3 | 1.1 | 450-700nm (visible) | 50% | Standard | 0.5-1.5λ per Ø10 | £18.03 | ||||
| 100 BV 63 | 100 x 63 | 1.1 | 450-700nm (visible) | 50% | Standard | 0.5-1.5λ per Ø10 | TBA | Send us a stock query | |||
| 16 BV 10 | 16 x 10 | 1.1 | 450-700nm (visible) | 50% | Standard | 0.5-1.5λ per Ø10 | TBA | Send us a stock query | |||
| 25 BV 00 | 25 dia. | 1.1 | 450-700nm (visible) | 50% | Standard | 0.5-1.5λ per Ø10 | £30.98 | ||||
| 25 BV 16 | 25 x 16 | 1.1 | 450-700nm (visible) | 50% | Standard | 0.5-1.5λ per Ø10 | £22.75 | ||||
| 40 BV 25 | 40 x 25 | 1.1 | 450-700nm (visible) | 50% | Standard | 0.5-1.5λ per Ø10 | TBA | Send us a stock query | |||
| 63 BV 40 | 63 x 40 | 1.1 | 450-700nm (visible) | 50% | Standard | 0.5-1.5λ per Ø10 | TBA | Send us a stock query | |||
| 10 BJ 06 | 10 x 6.3 | 1.1 | 530-1070nm (visible/ NIR) | 50% | Standard | 0.5-1.5λ per Ø10 | £23.11 | ||||
| 40 BN 25 | 40 x 25 | 3 | 530-1070nm (visible/ NIR) | 50% | Standard | 1-2λ per Ø25 | £44.77 | ||||
| 25 BN 16 | 25 x 16 | 3 | 530-1070nm (visible/ NIR) | 50% | Standard | 1-2λ per Ø25 | £31.58 | ||||
| 25 BQ 00 | 25 dia. | 4 | 450-700nm (visible) | 50% | Precision | λ/4 (90% aper.) | £53.24 | ||||
| 25 BQ 16 | 25 x 16 | 4 | 450-700nm (visible) | 50% | Precision | λ/4 (90% aper.) | £51.79 | ||||
| 40 BQ 25 | 40 x 25 | 6 | 450-700nm (visible) | 50% | Precision | λ/4 (90% aper.) | £78.41 | ||||
| 50 BQ 00 | 50 dia. | 6 | 450-700nm (visible) | 50% | Precision | λ/4 (90% aper.) | £102.25 | ||||
| 63 BQ 40 | 63 x 40 | 8 | 450-700nm (visible) | 50% | Precision | λ/4 (90% aper.) | £117.61 | ||||
| 16 BI 10 | 16 x 10 | 3 | 530-1070nm (visible/ NIR) | 50% | Precision | λ/4 (90% aper.) | £51.30 | ||||
| 25 BI 00 | 25 dia. | 4 | 530-1070nm (visible/ NIR) | 50% | Precision | λ/4 (90% aper.) | TBA | Send us a stock query | |||
| 25 BI 16 | 25 x 16 | 4 | 530-1070nm (visible/ NIR) | 50% | Precision | λ/4 (90% aper.) | £60.86 | ||||
| 40 BI 25 | 40 x 25 | 6 | 530-1070nm (visible/ NIR) | 50% | Precision | λ/4 (90% aper.) | £92.20 | ||||
| 50 BI 00 | 50 dia. | 6 | 530-1070nm (visible/ NIR) | 50% | Precision | λ/4 (90% aper.) | £120.27 | ||||
| 63 BI 40 | 63 x 40 | 8 | 530-1070nm (visible/ NIR) | 50% | Precision | λ/4 (90% aper.) | £138.79 | ||||
| 10 BN 06 | 10 x 6.3 | 3 | 530-1070nm (visible/ NIR) | 50% | Standard | 1-2λ per Ø25 | £23.11 | ||||
| 100 BN 63 | 100 x 63 | 3 | 530-1070nm (visible/ NIR) | 50% | Standard | 1-2λ per Ø25 | £114.10 | ||||
| 16 BN 10 | 16 x 10 | 3 | 530-1070nm (visible/ NIR) | 50% | Standard | 1-2λ per Ø25 | £24.68 | ||||
| 25 BN 00 | 25 dia. | 3 | 530-1070nm (visible/ NIR) | 50% | Standard | 1-2λ per Ø25 | £44.77 | ||||
| 16 BJ 10 | 16 x 10 | 1.1 | 530-1070nm (visible/ NIR) | 50% | Standard | 0.5-1.5λ per Ø10 | TBA | Send us a stock query | |||
| 25 BJ 00 | 25 dia. | 1.1 | 530-1070nm (visible/ NIR) | 50% | Standard | 0.5-1.5λ per Ø10 | £44.77 | ||||
| 25 BJ 16 | 25 x 16 | 1.1 | 530-1070nm (visible/ NIR) | 50% | Standard | 0.5-1.5λ per Ø10 | £31.58 | ||||
| 100 BD 63 | 100 x 63 | 3 | 450-700nm (visible) | 33% | Standard | 1-2λ per Ø25 | TBA | Send us a stock query | |||
| 16 BD 10 | 16 x 10 | 3 | 450-700nm (visible) | 33% | Standard | 1-2λ per Ø25 | £18.03 | ||||
| 25 BD 00 | 25 dia. | 3 | 450-700nm (visible) | 33% | Standard | 1-2λ per Ø25 | £30.98 | ||||
| 25 BD 16 | 25 x 16 | 3 | 450-700nm (visible) | 33% | Standard | 1-2λ per Ø25 | £22.75 | ||||
| 40 BD 25 | 40 x 25 | 3 | 450-700nm (visible) | 33% | Standard | 1-2λ per Ø25 | £30.98 | ||||
| 63 BD 40 | 63 x 40 | 3 | 450-700nm (visible) | 33% | Standard | 1-2λ per Ø25 | £45.25 | ||||
| 10 BL 06 | 10 x 6.3 | 3 | 1070-1650nm (NIR/ telecom) | 50% | Standard | 1-2λ per Ø25 | TBA | Send us a stock query | |||
| 100 BL 63 | 100 x 63 | 3 | 1070-1650nm (NIR/ telecom) | 50% | Standard | 1-2λ per Ø25 | TBA | Send us a stock query | |||
| 16 BL 10 | 16 x 10 | 3 | 1070-1650nm (NIR/ telecom) | 50% | Standard | 1-2λ per Ø25 | TBA | Send us a stock query | |||
| 25 BL 00 | 25 dia. | 3 | 1070-1650nm (NIR/ telecom) | 50% | Standard | 1-2λ per Ø25 | £44.77 | ||||
| 25 BL 16 | 25 x 16 | 3 | 1070-1650nm (NIR/ telecom) | 50% | Standard | 1-2λ per Ø25 | £31.58 | ||||
| 40 BL 25 | 40 x 25 | 3 | 1070-1650nm (NIR/ telecom) | 50% | Standard | 1-2λ per Ø25 | £44.77 | ||||
| 63 BL 40 | 63 x 40 | 3 | 1070-1650nm (NIR/ telecom) | 50% | Standard | 1-2λ per Ø25 | £66.31 | ||||
| 100 BT 63 | 100 x 63 | 3 | 450-700nm (visible) | 40% nom. | Economy | 1-2λ per Ø25 | £46.22 | ||||
| 160 BT 100 | 160 x 100 | 3 | 450-700nm (visible) | 40% nom. | Economy | 1-2λ per Ø25 | TBA | Send us a stock query | |||
| 10 BD 06 | 10 x 6.3 | 3 | 450-700nm (visible) | 33% | Standard | 1-2λ per Ø25 | £18.03 | ||||
| 63 BA 40 | 63 x 40 | 3 | 450-700nm (visible) | 50% | Standard | 1-2λ per Ø25 | £45.25 | ||||
| 40 BJ 25 | 40 x 25 | 1.1 | 530-1070nm (visible/ NIR) | 50% | Standard | 0.5-1.5λ per Ø10 | £46.82 | ||||
| 10 BW 06 | 10 x 6.3 | 1.1 | 1070-1650nm (NIR/ telecom) | 50% | Standard | 0.5-1.5λ per Ø10 | £23.11 | ||||
| 16 BW 10 | 16 x 10 | 1.1 | 1070-1650nm (NIR/ telecom) | 50% | Standard | 0.5-1.5λ per Ø10 | TBA | Send us a stock query | |||
| 25 BW 00 | 25 dia. | 1.1 | 1070-1650nm (NIR/ telecom) | 50% | Standard | 0.5-1.5λ per Ø10 | £44.77 | ||||
| 25 BW 16 | 25 x 16 | 1.1 | 1070-1650nm (NIR/ telecom) | 50% | Standard | 0.5-1.5λ per Ø10 | £31.58 | ||||
| 40 BW 25 | 40 x 25 | 1.1 | 1070-1650nm (NIR/ telecom) | 50% | Standard | 0.5-1.5λ per Ø10 | £44.77 | ||||
| 10 BA 06 | 10 x 6.3 | 3 | 450-700nm (visible) | 50% | Standard | 1-2λ per Ø25 | £18.03 | ||||
| 100 BA 63 | 100 x 63 | 3 | 450-700nm (visible) | 50% | Standard | 1-2λ per Ø25 | TBA | Send us a stock query | |||
| 16 BA 10 | 16 x 10 | 3 | 450-700nm (visible) | 50% | Standard | 1-2λ per Ø25 | TBA | Send us a stock query | |||
| 160 BA 100 | 160 x 100 | 3 | 450-700nm (visible) | 50% | Standard | 1-2λ per Ø25 | TBA | Send us a stock query | |||
| 25 BA 00 | 25 dia. | 3 | 450-700nm (visible) | 50% | Standard | 1-2λ per Ø25 | TBA | Send us a stock query | |||
| 25 BA 16 | 25 x 16 | 3 | 450-700nm (visible) | 50% | Standard | 1-2λ per Ø25 | TBA | Send us a stock query | |||
| 40 BA 00 | 40 dia. | 3 | 450-700nm (visible) | 50% | Standard | 1-2λ per Ø25 | TBA | Send us a stock query | |||
| 40 BA 25 | 40 x 25 | 3 | 450-700nm (visible) | 50% | Standard | 1-2λ per Ø25 | TBA | Send us a stock query | |||
| 50 BA 00 | 50 dia. | 3 | 450-700nm (visible) | 50% | Standard | 1-2λ per Ø25 | TBA | Send us a stock query | |||
| 250 BT 160 | 250 x 160 | 3 | 450-700nm (visible) | 40% nom. | Economy | 1-2λ per Ø25 | TBA | Send us a stock query | |||
For more information regarding stock availability icons, please see our shipping page.
