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 Plate Beamsplitters - Precision Grade - NIR 50/50
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| Our precision grade plate beamsplitters are significantly lighter and cheaper than the conventional cube beamsplitters and eliminate issues with stray back reflected light from the entry and exit faces. They are made from high quality BK7 and have both faces polished to a high degree of flatness (lambda/4) with a high degree of parallelism. Our stock of beamsplitters have an ion-plated dielectric multilayer coating which give excellent durability and are not largely effected by temperature changes. Their backs are multilayer AR coated to eliminate the spurious reflection and they are available for use in the near IR with a 50/50 split ratio. The stock listed below are circular plate beamsplitters of various diameters and thicknesses. Specifications: | Material: | BK7 | | Diameter: | +0 / -0.1mm | | Length / Width: | ± 0.1 mm | | Thickness: | ± 0.1 mm | | Surface Quality: | <60:40 scratch/dig | | Flatness:; | λ/4 over 90% aperture (both faces) | | Parallel: | <30 arcsec | | Beamsplitter Coating: | NIR 50% | | AR Coating On Rear: | NIR: BBAR Ravg 0.4% @630-1100nm (AI1) | | Polarisation Ratio: | Rs/Rp = 2 (approx. for all types) | | | | | | | | |
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