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Broadband Beam Samplers
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Broadband Beam Samplers

Broadband Beam Samplers
1 /1Page

Catalog excerpts

Broadband Beam Samplers   -1

544 O p t i c s Phone: 1-800-222-6440 • Fax: 1-949-253-1680 WINDOWS BEAMSPLITTERS OPTICAL FILTERS POLARIZATION OPTICS DIFFRACTION GRATINGS HIGH-ENERGY OPTICS ULTRAFAST LASER OPTICS ACCESSORIES Broadband Beam Samplers Our broadband beam samplers are designed to split off or sample a beam by Fresnel reflection for beam monitoring applications where minimum disturbance of the transmitted beam is necessary. These beam samplers are available in either BK 7 or UV grade fused silica in 25.4, 50.8, and 76.2 mm diameter sizes. • Uncoated front surface for beam sampling • Fresnel reflectance from 1–10% at 45° • AR coated back surface eliminates ghosting • Slight wedge virtually eliminates internal fringes • BK 7 or UV fused silica substrates Specifications Material BK7, grade A, fine annealed optical glass UV grade fused silica Surface Flatness Specification below at 632.8 nm over the clear aperture fringes Clear Aperture >central 80% of diameter Diameter Tolerance +0/-0.13 mm Thickness Tolerance ±0.38 mm Wedge 30 ±15 arc min Chamfers 25.4 mm: 0.25-0.76 mm face width x 45° ±15° 50.8 mm & 76.2 mm: 0.38-1.14 mm face width x 45° ±15° Surface S1 Uncoated, Fresnel reflection from uncoated substrate Antireflection Coating, S2 Multilayer coating, Ravg <0.75% at 45° over the specified wavelength range Durability MIL-C-675C Cleaning Non-abrasive method, acetone or isopropyl alcohol on lens tissue recommended (see page 622) Damage Threshold 500 W/cm2 CW, 1 J/cm2 with 10 nsec pulses, typical Coatings Wavelength Range (nm) Reflectivity per Surface Angle of Incidence Coating Code 440–700 Ravg <0.75 % 45° NC.1 660–1000 Ravg <0.75 % 45° NC.2 1010–1550 Ravg <0.75 % 45° NC.3 Ordering Information To order, append the coating code NC.1, NC.2, or NC.3 to the substrate number. For example, 10B20+NC.1 = 10B20NC.1 Model Diameter (mm) Thickness (mm) Material Surface Flatness Surface Quality 10B10 25.4 6.10 BK 7 ë/5 20-10 10B20 25.4 6.10 BK 7 ë/10 15-5 10Q20 25.4 6.10 UVFS ë/10 15-5 10Q40 25.4 6.10 UVFS ë/20 10-2 20B10 50.8 9.40 BK 7 ë/5 20-10 20B20 50.8 9.40 BK 7 ë/10 15-5 20Q20 50.8 9.40 UVFS ë/10 15-5 20Q40 50.8 9.40 UVFS ë/20 10-2 30B10 76.2 12.45 BK 7 ë/5 20-10 30Q20 76.2 12.45 UVFS ë/10 15-5 30Q40 76.2 12.45 UVFS ë/20 10-2 C ø A ø B 30 arc min Wedge NOTE: S1 and S2 defined in specifications table S S2 1 Dimension (mm) Model øA øB C 10B/10Q 25.4 20.3 6.10 20B/20Q 50.8 40.6 9.40 30B/30Q 76.2 61.0 12.45 Availability – Guaranteed on select items @ newport.com

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