The BP940-25nm-0.8mm bandpass filter is engineered for compact, high-precision near-infrared detection and imaging. Featuring a 25nm full width at half maximum (FWHM) and centered at 940nm, this filter delivers transmission greater than 90% in the 935-945nm window while blocking 350-1100nm at transmission less than 1%. Its 0.8mm thin profile is optimized for OEM modules and portable or stacked detector systems.
Technical Specifications
| Parameter | Specification |
|---|---|
| Center Wavelength (CWL) | 940nm ± 2nm at T greater than 90% |
| Transmission Range | 935-945nm at T greater than 90% |
| Full Width at Half Maximum (FWHM) | 25nm ± 2nm |
| Blocking Range | 350-1100nm at T less than 1% |
| Substrate Thickness | 0.8mm |
| Surface Quality | 60/40 scratch-dig per MIL-PRF-13830B |
| Reference | 20206771 |
Key Performance Features
This NIR filter achieves strong signal throughput and superior crosstalk suppression for 940nm LED, laser, and imaging systems. The 25nm moderate bandwidth collects more photons for better SNR in time-of-flight, LIDAR, or fluorescence workflows, while the thin construction supports multi-filter stacks in compact packages. Hard ion-assisted coatings ensure reliable use in tough environments and long-term field operation.
Applications
- Laser and LED sensors: 940nm ToF/3D/Machine vision, facial recognition, mobile proximity modules. - Medical and wearables: Pulse oximeters, health analytics, photoplethysmography, portable diagnostics. - OEM instrumentation: High-density detectors, smart home, IoT modules, IR remote control. - Scientific and industrial NIR: Flow cytometers, NIR fluorescence, quality/process control.
Customization & Service
OPTOStokes offers precision tuning (CWL, FWHM), size/geometry, and scalable production for OEMs. Filters meet ISO 9001:2015 and ship rapidly. For quotes, drawings, and technical design advice, contact sales@optofilters.com or www.optofilters.com.
Pain Points & CTA
Space-constrained, multi-channel, or SNR-limited? BP940-25nm-0.8mm maximizes signal in tight spaces—ask us for quick samples, expert NIR optics support, or rapid OEM scaling.
