Polarizing Cube Beamsplitters, Polka Dot Beamsplitters
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Catalog excerpts

Polarizing Cube Beamsplitters Newport offers a variety of polarizing cube beamsplitters to provide solutions for your application, including: broadband, UV laser line, laser line, and high-energy Nd:YAG laser polarizing cube beamsplitters. Each beamsplitter consists of a pair of precision right-angle prisms carefully cemented together to minimize wavefront distortion (except our high-energy Nd:YAG cubes, which are optically contacted). Our polarizing cube beamsplitters are offered in 12.7 mm and 25.4 mm sizes. For more information see page 577. • High extinction ratios • Low wavefront distortion • Standard 12.7 and 25.4 mm sizes easily mount in Newport holders • A variety of products to meet specific applications P P S S NOTE: To avoid damage, beam must enter prism on the side marked with a dot. Polka Dot Beamsplitters Our 50/50 Polka Dot Beamsplitters are UV fused silica substrates coated with aluminum and SiO protective overcoat in a "polka dot" pattern. Optimized for white light illumination applications, they provide two unique advantages over traditional dielectric beam splitters: they are neutral over the wavelength range of the fused silica substrate and the aluminum coating, and they are not sensitive to angle of incidence changes. • 50% reflectance, 50% transmission from 250 to 2500 nm • Insensitive to angle of incidence changes • 1" diameter round or 2" square sizes • Ideal for white light illumination applications Specifications Material UV grade fused silica Coating Al(SiO) Size tolerance +0/-0.25 mm Thickness 1.6 mm, ±0.20 mm Edge Finish Ground and beveled Surface Quality 60-40 scratch-dig Surface Flatness 1ë wave both sides @ 632.8 nm Parallelism 30 arc sec (0.15 mrad) Min beam size for 50/50 split 0.37 inch (9.5 mm) diameter Usable aperture All but a 3 mm outer rim R/T ratio 50/50, ±5% @ 500 nm Acceptance angle 0° to 45° Maximum temperature 150°C 200 300 400 500 600 700 800 2400 2500 0 25 50 75 100 WAVELENGTH (nm) (PERCENT) TRANSMITTANCE REFLECTANCE Transmittance/Reflectance of Polka Dot Beamsplitters ALUMINIZED AREA CLEAR AREA 3.2 mm 2.5 mm DIA. ~ Pattern of Polka Dot Beam Splitters Ordering Information Model Dimensions (mm) PDOT-1 25.4 ö PDOT-2 50.8 x 50.8 550 O p t i c s WINDOWS BEAMSPLITTERS OPTICAL FILTERS POLARIZATION OPTICS DIFFRACTION GRATINGS HIGH-ENERGY OPTICS ULTRAFAST LASER OPTICS ACCESSORIES Email: [email protected] • Web: newport.com

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