Plate beamsplitters-precision grade (λ/4) These Precision grade Beamsplitters are considerably lighter and cheaper than traditional cube beamsplitters, and avoid problems with stray back reflected light from entry and exit faces. These Precision grade Beamsplitters are available for use in Visible and Infrared wavelengths with 50/50 split ratio. These Precision grade Beamsplitters have ion-plated dielectric multilayer coatings giving excellent durability and neutrality and are much less affected by temperature changes than ordinary coatings. The back of the Beamsplitters are multilayer AR coated to almost eliminate the spurious reflection.  These Precision grade Beamsplitters are made from optically polished BK7, flat and parallel. Typical usage is in laser applications.
Knight Optical > Beamsplitters > Plate beamsplitters - Precision grade (Lambda/4) Visible 50/50 This is the section containing Visible 50/50. NIR 50/50 This is the section containing NIR 50/50. Only UK and EU customers are charged VAT at 17.5%, customers outside the EU and EU customers based outside the UK who have a valid EU VAT number will not be charged VAT Bulk Discounts! Where (B) appears next to a price below, bulk prices are available, click the (B) button to view! Knight Optical > Beamsplitters > Plate beamsplitters - Precision grade (Lambda/4)
Specification   Material: BK7 Material Data: (see materials section) Diameter: +0 / -0.1mm Length / Width: ± 0.1 mm Thickness: ± 0.1 mm Surface Quality: <60:40 Flatness (both sides): <λ/4 over 90% of aperture size Parallel: <30 arcsec Coating: Visible 50% (see BV06 coating spec) Visible 33% (see BV09 coating spec) NIR 50% (see BI06 coating spec) Polarisation Ratio: Rs/Rp = 2 (approx. for all types)
Specific requirements We manufacture Precision Plate beamsplitters to any size at short notice, so if your requirements are not listed please contact us by telephone / fax or email: stockrequirement@knightoptical.co.uk Options available   · Cutting down or edged to special sizes Beamsplitters for 1070-2000nm Available at short notice from stock material, please enquire. See also Metallic neutral density filters (can be used as beamsplitters) Dichroic beamsplitters Fresnel prisms and beam dividers