Germanium Neutral Density Filters Datasheets

Standard IR ND Filter, OD=0.3, 25mm diameter -- 030FNIR-25
from Andover Corporation

Metallic-coated neutral density (ND) filters obtain their optical density from a metal alloy coating on a substrate determined by the wavelength region of interest. Unlike the all- dielectric or absorption type, the metallic type ND filter employs a combination of absorption and reflection to reduce... [See More]

  • Substrate Material: Germanium
  • Surface Quality: 80-50 Scratch / Dig
IR Neutral Density Filter, 2.0 OD, 25mm Dia -- NT64-356
from Edmund Optics Inc.

Spectrally Flat from 2 μm to 14 μm. Precision Germanium Substrate. Our IR Neutral Density Filters feature excellent linearity over a wide spectral band of 2 μm to 14 μm. Ideal for thermal and medical imaging, the filters are available in 5 densities and 2 size options. Attenuation is... [See More]

  • Substrate Material: Germanium
  • Filter Diameter, Side Length, or Rectangular Length: 25
  • Filter Shape: Circular
  • Thickness: 1
Infrared Neutral Density Filters
from Newport Corporation

Made from Germanium material, these filters attenuate IR radiation from 2 to 14 µm. The one-inch diameter filters are coated with a spectrally neutral vacuum deposited metal alloy reflective coating. Attenuate IR radiation from 2 to 14 µm. High damage threshold up to GW/cm2. Precision... [See More]

  • Substrate Material: Germanium
  • Filter Diameter, Side Length, or Rectangular Length: 25 to 25.4
  • Filter Shape: Circular
  • Optical Density: 0.3000 to 3