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Optical Crown Glass Metallic Neutral Density Filters

Optical Crown Glass Metallic Neutral Density Filters
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Optical Crown Glass Metallic Neutral Density Filters - 1

566 Phone: 1-800-222-6440 • Fax: 1-949-253-1680 O p t i c s ACCESSORIES ULTRAFAST LASER OPTICS HIGH-ENERGY OPTICS DIFFRACTION GRATINGS POLARIZATION OPTICS OPTICAL FILTERS BEAMSPLITTERS WINDOWS Optical Crown Glass Metallic Neutral Density Filters Our metallic neutral density coatings provide broadband attenuation for low power applications. The coating is deposited on one side of a cost effective B 270 optical glass substrate, providing excellent performance in the visible and near-infrared. Available in 25.4 mm diameter round or 50.8 mm square sizes. FWM Series Indexed Filter Wheels, page 690 • Broadband attenuation, visible to near IR • Metallic neutral density coating • Cost effective optical crown glass • For lower power applications Specifications Material B 270 optical crown glass Surface Flatness 5ë at 632.8 nm over the clear aperture Clear Aperture central 80% of dimensions Surface Quality 60-40 scratch-dig Dimensions ±0.25 mm Thickness 3.0 ±0.25 mm Wedge 5 arc min Chamfers 0.25–0.76 mm face width x 45° ±15° Angle of Incidence 0° Optical Density at 632.8 nm 0.04 ±2.5%, 0.1 ±8%, 0.2 ±7%, 0.3 ±6%, 0.4 ±5%, and ±4% at 0.5OD3.0 Durability MIL-C-48497A, adhesion, humidity, moderate abrasion, and solubility requirements Cleaning Non-abrasive method, acetone or isopropyl alcohol on lens tissue recommended (see page 622) Damage Threshold 30 W/cm2 CW, typical; not recommended for pulsed laser use Note: Due to the absorptive nature of the metallic coating, use with high-power lasers should be avoided. Power levels less than 30 W/cm2 are advised. ND05 ND10 ND20 ND30 400 600 800 Wavelength (nm) 1000 1200 0 1 2 3 4 Optical Density Typical Ordering Information Optical Density Transmission at 632.8 nm Quantity in Filter Set Model Model 25.4 mm Dia 50.8 x 50.8 mm 0.04 91.6 % 1 FBR-ND004 FBS-ND004 0.1 79.4 % 2 FBR-ND01 FBS-ND01 0.2 63.1 % FBR-ND02 FBS-ND02 0.3 50.1 % 1 FBR-ND03 FBS-ND03 0.4 39.8 % FBR-ND04 FBS-ND04 0.5 31.6 % 1 FBR-ND05 FBS-ND05 1.0 10.0 % 1 FBR-ND10 FBS-ND10 1.5 3.2 % FBR-ND15 FBS-ND15 2.0 1.0 % 1 FBR-ND20 FBS-ND20 2.5 0.3 % FBR-ND25 FBS-ND25 3.0 0.1 % 1 FBR-ND30 FBS-ND30 Set of Metallic Neutral Density Filters FB-ND Please see page 445 for the optical density equation. For attenuation of high-energy lasers, we recommend our Model 935 Variable Attenuator. Filter Set ø 25.4 3.0 ø 20.3 CLEAR APERTURE 3.0 40.6 CLEAR APERTURE 50.8 FH-1S Filter Holder page 688 Availability – Guaranteed on select items @ newport.com

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