Parallel Windows
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O p t i c s 539 Email: sales@newport.com • Web: newport.com WINDOWS BEAMSPLITTERS OPTICAL FILTERS POLARIZATION OPTICS DIFFRACTION GRATINGS HIGH-ENERGY OPTICS ULTRAFAST LASER OPTICS ACCESSORIES Parallel Windows Our BK 7 and UV grade fused silica parallel windows feature low distortion, low scatter, and excellent parallelism for laser and non-laser applications. They are available with surface flatness as good as ë/20 and scratch-dig as good as 10-5. Low scatter is particularly advantageous in imaging applications and in intracavity laser applications. Specifications Material BK 7, grade A, fine annealed optical glass UV grade fused silica Surface Flatness See Order Info Table Clear Aperture central 85% of diameter Surface Quality See Order Info Table Wedge 30 arc sec Dimensions +0/-0.15 mm Thickness Tolerance ±0.25 mm Chamfers 12.7 & 25.4 mm: 0.25–0.75 mm face width x 45° ±15° 50.8 mm: 0.38–1.14 mm face width x 45° ±15° Antireflection Coating broadband, multilayer antireflection coating,Ravg <0.5% Durability MIL-C-675C, moderate abrasion Cleaning Non-abrasive method, acetone or isopropyl alcohol on lens tissue recommended (see page 622) Damage Threshold 1000 W/cm2 CW, 2 J/cm2 with 10 nsec pulses, typical Ordering Information To order with a coating, append the coating code AR.10, AR.14, AR.16, or AR.18 to the product number. For example, 10BW20-30 + AR.14 = 10BW20-30AR.14 Model Material Surface Flatness(1) Surface Quality Diameter (mm) Thickness (mm) 05BW20-30 BK 7 ë/10 40-20 12.7 6.0 10BW20-30 BK 7 ë/10 40-20 25.4 6.0 20BW20-30 BK 7 ë/10 40-20 50.8 10.0 05QW20-30 UV grade fused silica ë/10 40-20 12.7 6.0 10QW20-30 UV grade fused silica ë/10 40-20 25.4 6.0 20QW20-30 UV grade fused silica ë/10 40-20 50.8 10.0 05BW40-30 BK 7 ë/20 10-5 12.7 6.0 10BW40-30 BK 7 ë/20 10-5 25.4 6.0 20BW40-30 BK 7 ë/20 10-5 50.8 10.0 05QW40-30 UV grade fused silica ë/20 10-5 12.7 6.0 10QW40-30 UV grade fused silica ë/20 10-5 25.4 6.0 20QW40-30 UV grade fused silica ë/20 10-5 50.8 10.0 1) Surface flatness measured at 632.8 nm over the clear aperture Antireflection coating specifications can be found on page 455. • Parallel to less than 30 arc sec for minimal transmitted beam deviation • ë/20 surface flatness and 10-5 scratch-dig • High quality BK 7 or UV grade fused silica • 12.7, 25.4 and 50.8 mm diameters • Broadband AR coatings for UV, visible, or NIR applications CLEAR APERTURE ø A B Dimension (mm) Model øA B 05BW/QW 12.7 6.0 10BW/QW 25.4 6.0 20BW/QW 50.8 10.0 LH Series Lens Mounts see page 669 Availability – Guaranteed on select items @ newport.com

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Parallel Windows
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