Narrow band pass (NBP) infrared filters are engineered to isolate a specific, narrow region of the infrared spectrum, making them essential in applications where precise detection of a specific wavelength is critical. These filters are widely used in industries that rely on accurate spectral analysis and measurement. Umicore offers a broad selection of off-the-shelf infrared filter designs, while also leveraging extensive experience in creating customized solutions to meet unique technical performance requirements. Whether for standard or highly specialized applications, our filters deliver the precision and reliability needed for optimal performance.

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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