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)