Ultrafast Laser Beam Sampler
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Catalog excerpts

620 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 Ultrafast Laser Beam Sampler Our 3-mm thick Ultrafast Laser Beam Sampler is designed to minimize pulse dispersion while splitting off, or sampling, a beam for monitoring applications. It is uncoated on the front surface to achieve beam division by Fresnel Reflection, and the back surface is antireflection coated to prevent ghosting. A slight wedge in the substrate virtually eliminates internal fringes. • 3 mm thickness minimizes pulse dispersion • Fresnel Reflectance from 1-10% at 45° • Uncoated front surface for beam sampling, AR coated back surface Specifications Material BK7, grade A, fine annealed optical glass Surface Flatness ë/10 at 632.8 nm over the clear aperture fringes Clear Aperture >central 80% of diameter Diameter Tolerance +0/-0.13 mm Thickness 3.00 mm ±0.38 mm Wedge 30 ±15 arc min Chamfers 0.25-0.76 mm face width x 45° ±15° Surface S1 Uncoated, Fresnel Reflection from uncoated substrate Antireflection Coating, S2 Multilayer coating, Ravg < 0.75% at 45° from 660-1000 nm Angle of Incidence 45° Durability MIL-C-675C Cleaning Non-abrasive method, acetone or isopropyl alcohol on lens tissue recommended (see page 622) S P 0 20 40 60 80 Angle of Incidence (Degrees) Typical 10 20 30 40 0 Reflectance (%) BK 7 Substrate, NC.2 Ordering Information Model Diameter (mm) Thickness (mm) 10B20-01NC.2 25.4 3.00 C ø A ø B 30 arc min Wedge NOTE: S1 and S2 defined in specifications table S S2 1 Dimension (mm) øA øB C 25.4 20.3 3.0 Kin-a-Flip Mount page 715

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