The FBS-ND25 Metallic Neutral Density Filter is a 50.8 x 50.8 mm square Optical Crown Glass Metallic ND Filter with an optical density of 2.5 at 632.8 nm. 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.

• 尺寸

  50.8 x 50.8 mm

• 光学密度

  2.5

• 光学密度公差

  ±4%

• 波长范围

  400-2000 nm

• 材料

  B270 Optical Crown Glass

• 入射角

  0°

• 楔形

  ≤5 arc min

• 透射

  0.3 % at 632.8 nm

• 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

• 
  

FBS-ND25金属中性密度滤光片为50.8 x 50.8 mm方形光学冠玻璃金属ND滤光片，在632.8 nm处的光密度为2.5。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。