Short wave pass (SWP) infrared filters are specifically engineered to provide efficient separation between adjacent spectral bands within the infrared spectrum. These filters offer flexibility, with cut-off edges that can be precisely positioned anywhere between 0.85 µm and 13 µm, depending on the application needs. Umicore offers an extensive selection of ready-made IR filter designs, while also leveraging its deep expertise in crafting custom solutions that meet specific technical performance requirements.

Infrared filter spectral specifications

  • Transmission Peak: Typically ≥85%
  • Transmission Average: Typically ≥70%
  • Attenuation: Typically ≤0.1% outside passband
  • Edge Slopes: Typically 3% to 5%
  • Surface Quality: Typically 60:40 Scratch:Dig
  • Operating Temperature: Typically -40°C to +80°C

Infrared filter environmental durability testing

  • Adhesion: MIL-C-48497A (4.5.3.1)
  • Humidity: MIL-C-48497A (4.5.3.2)
  • Moderate Abrasion: MIL-C-48497A (4.5.3.3)
  • Temperature: MIL-C-48497A (4.5.4.1)
  • Solubility/Cleanability: MIL-C-48497A (4.5.4.2)

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