The FB-ND Optical Crown Glass Metallic Neutral Density Filter Set is a set of eight, 1 inch (25.4 mm) diameter optical crown glass metallic ND filters of various optical density, and includes a wood case. 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. This ND filter set includes the following filters: FBR-ND004, (2) FBR-ND01, FBR-ND03, FBR-ND05, FBR-ND10, FBR-ND20, and FBR-ND30.

• 尺寸

  Ø25.4 mm

• 波长范围

  400-2000 nm

• 材料

  B270 Optical Crown Glass

• 入射角

  0°

• 楔形

  ≤5 arc min

• 耐用性

  MIL-C-48497A, adhesion, humidity, moderate abrasion, and solubility requirements

• 尺寸公差

  +0/-0.50 mm

• 表面平面度

  ≤5λ at 632.8 nm over the clear aperture

• 表面质量

  60-40 scratch-dig

• 倒角

  0.25–0.76 mm face width

• 倒角公差

  45° ±15°

• 清洁

  See How to Clean Optics

• 通光孔径

  ≥central 80% of dimensions

• 损伤阈值

  30 W/cm2 CW, typical; not recommended for pulsed laser use

• 厚度

  3.0 mm

• 厚度公差

  ±0.25 mm

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本发明的FB-ND光学冠玻璃金属中性密度滤光片组是一套直径为1英寸(25.4 mm)、各种光学密度的光学冠玻璃金属ND滤光片组，包括一个木箱。我们的金属中性密度涂层为低功率应用提供宽带衰减。该涂层沉积在具有成本效益的b270光学玻璃基板的一侧，在可见光和近红外波段提供了优异的性能。该ND滤波器集包括以下滤波器:FBR-ND004， (2) FBR-ND01, FBR-ND03, FBR-ND05, FBR-ND10, FBR-ND20, FBR-ND30。