BP870nm Bandpass Filter | 40nm FWHM, OD4+ Broadband Blocking

The OPTOStokes BP870nm bandpass filter is a precision near-infrared optical component built for high-accuracy wavelength selection. Engineered with a 40nm full width at half maximum bandwidth, it achieves average transmission greater than 90% across the 860nm to 880nm spectral range, paired with deep broadband blocking from 200nm to 1100nm at optical density greater than 4. Calibrated for normal incidence at 0 degrees, this filter delivers consistent, repeatable spectral performance for demanding industrial and scientific applications. As part of our extensive in-stock bandpass filters portfolio, it combines world-class coating precision with dependable lead times to support both prototype validation and volume production runs.

Technical Specifications

Primary Applications

This 870nm NIR bandpass filter is designed for integration across a wide range of industrial and analytical optical systems. It is widely deployed in industrial inspection equipment, machine vision setups, and laser measurement systems where precise near-infrared wavelength isolation is critical. Additional use cases include NIR imaging, optical testing benches, automated quality control assemblies, and non-destructive testing instruments. Its stable spectral response also makes it suitable for integration into analytical instruments and industrial automation platforms.

Customization & Service Support

OPTOStokes provides full customization capabilities to match your exact system integration requirements. Available form factors include circular, square, and custom irregular shapes, with optional mounting rings for seamless assembly into optical housings. All units are fabricated using precision thin film coating technology to ensure consistent batch-to-batch spectral performance. We maintain a large in-stock inventory of standard NIR filters for fast turnaround, and our in-house engineering team supports fully custom spectral designs with reliable, transparent lead times and guaranteed quality compliance. Every filter undergoes rigorous spectral testing before shipment to verify adherence to stated specifications.

Expert Support & Inquiry

For optical engineers and procurement teams, sourcing high-quality optical filters with predictable delivery and consistent performance can create significant project risks. Extended production lead times, limited customization flexibility, and inconsistent coating quality can disrupt development timelines and raise integration costs. At OPTOStokes, we address these core pain points directly through our combination of world-class manufacturing precision, extensive ready-to-ship inventory, and dedicated technical support. Whether you require standard off-the-shelf units or fully custom spectral designs tailored to your application, our team delivers clear communication and dependable execution for every order.

To discuss your specific project requirements, request a detailed datasheet, or receive a formal quote, contact our optical specialists at sales@optofilters.com or submit an inquiry through our website. We provide responsive technical support and custom solution design to support your work from initial prototype through full-scale production.