Neutral Density Filter, Infrared, 25 mm, 0.5 OD, ±2.00% Tolerance

Technical Specs

  • Size
    Ø25.0 mm
  • Wavelength Range
    2000-5000 nm
  • Optical Density
    0.5
  • Transmission
    31.6%
  • Transmission Tolerance
    ±2%
  • Material
    Germanium
  • Coating Type
    Metallic Neutral Density
  • Size Tolerance
    ± 0.2 mm
  • Thickness
    1.0 mm
  • Thickness Tolerance
    ± 0.2 mm
  • Surface Flatness
    3-5 λ per inch
  • Surface Quality
    60-40 scratch-dig
  • Clear Aperture
    90 % of central diameter
  • Parallelism
    < 10 arc minute