Wide band pass (WBP) infrared filters are specifically designed to isolate a broad spectral band within the infrared spectrum, offering high peak transmission across the entire passband. These filters are ideal for applications that require efficient transmission over a wider wavelength range, ensuring accurate and reliable performance. Umicore provides an extensive selection of off-the-shelf IR filter designs, while also drawing on deep expertise in developing custom solutions tailored to meet specific technical performance requirements. Whether for standard or specialized applications, our filters are crafted to deliver high precision and durability.
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)
