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 Plate Beamsplitters - General-Purpose Grade - NIR 50/50 - Rectangles
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| Our general purpose plate beamsplitters are for use at 45° and are available for both visible and near IR applications. They have a multilayer broad band AR coating on the rear to eliminate ghosting effects and are made from standard white float glass that has a relatively good grade of flatness and surface quality. We stock 50/50 plate beamsplitters for near IR applications.
The stock listed below are rectangular general purpose beamsplitters of various dimensions and thicknesses. Specifications: | Material: | White Float Glass, B270 (for NIR range) | | Diameter: | +0 / -0.2mm | | Length / Width: | ± 0.3 mm (<100mm)
± 0.5 mm (>100mm) | | Thickness: | ± 0.2 mm | | Surface Quality: | <60:40 scratch/dig | | Flatness (typical):
1mm thick
3mm thick |
0.5-1.5 λ/10mm dia
1-2 λ/25mm dia | | Parallel: | <30 arcsec | | Beamsplitter Coating: | Visible 50% NIR 50%
Visible 33/67% | | AR Coating
On Rear: | Visible: BBAR Ravg 0.5% @450-900nm (AV2)
NIR: BBAR Ravg 0.4% @630-1100nm (AI1) | | Polarisation Ratio: | Rs/Rp = 2 (approx. for all types) | | | | | | | | |
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