Wide Band Pass Infrared Filters

Wide Band Pass (WBP) Infrared Filters are designed to isolate a wide spectral band in the infrared spectrum and exhibit high peak transmission throughout the passband.  

Example of WBP IR Filter Spectral Transmission Graph

Umicore has a wide range of off-the-shelf IR Filter designs, as well as extensive experience in designing and producing to bespoke technical performance requirements.  

Contact us to discuss your application and learn how we can best support you.

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)