BBP-940 Bandpass Filter
Precision 940 nm detection with excellent transmission and strong broad-spectrum blocking.
- Centre wavelength (CWL): 944.2 nm
- Bandwidth (FWHM): 38.8 nm
- Peak transmittance: ≥ 97.9 % T
- Passband range: 925 – 964 nm
- Edge steepness: ~17 nm (10 → 90 % per edge)
- Out-of-band blocking: OD ≥ 1.5 (300–905 nm, 963–1200 nm)
- AOI: 0° (normal incidence); custom angles available
- Construction: Ion-assisted hard-oxide; 5 – 450 mm shapes, 0.21 – 3.8 mm thick
- Custom options: CWL shifting, bandwidth tuning, custom blocking ranges, rapid prototypes
Learn more
BBP-940 Hybrid delivers Centre wavelength (CWL) 944.2 nm, Bandwidth (FWHM) 38.8 nm, and Peak transmittance ≥ 97.9 % T.
The hard-oxide coating is built for repeated handling, heat, and cleaning.
Best suited for:
Precision 940 nm LiDAR, medical imaging, photon-counting systems, spectroscopic NIR detection.
Description
The BBP-940 is a narrow near-infrared filter centered at 940 nm with a precise 38 nm FWHM passband (925-963 nm). Peak transmission reaches 97.9 %. This is the standard narrow variant optimized for 940 nm face detection, structured-light LiDAR, and biometric sensing. Exceptional blocking everywhere (all visible < 0.4 %, all visible and lower NIR < 1 %) makes this the gold standard for daylight-robust 940 nm applications.
Key Advantages
- Narrow 940 nm passband – 38 nm FWHM provides monochromatic-grade isolation perfect for face detection and LiDAR
- Exceptional universal blocking – All visible bands plunge below 0.4 %, SWIR below 0.1 % - purest 940 nm isolation available
- Hard-oxide multilayer durability – Ion-assisted deposition ensures stable performance through automotive thermal cycles and stress
- Custom format options – Round, square, and free-form blanks from 5 mm to 450 mm with thickness 0.21-3.8 mm
- Substrate flexibility – Borofloat, soda-lime, Schott D263 T, and Corning Eagle XG support diverse architectures
Typical Applications
- Face detection and biometrics – Secure facial recognition in smartphones, tablets, and IoT devices using 940 nm illumination
- Structured-light LiDAR – High-precision 3D depth sensing for autonomous vehicles and robotics
- Proximity sensing – Ultra-clean 940 nm isolation for gesture recognition and human-machine interfaces
- Industrial biometrics – Fingerprint and iris recognition systems requiring maximum 940 nm spectral purity
- Consumer electronics – Premium sensing features in wearables, AR devices, and mobile computing platforms
Deploy BBP-940 for production-scale face detection and LiDAR applications with rapid custom manufacturing. We support both consumer devices and automotive-grade systems.
FAQ
BBP-940 FAQ
What is BBP-940 and what is it used for?
BBP-940 is a Narrow 940 nm bandpass for face detection and LiDAR. The BBP-940 is a narrow near-infrared filter centered at 940 nm with a precise 38 nm FWHM passband (925-963 nm). Peak transmission reaches 97.9 %. Common uses include Face detection and biometrics, Structured-light LiDAR, Proximity sensing, and Industrial biometrics.
What are the key optical specs of BBP-940?
Key published specs for BBP-940 include Centre wavelength (CWL): 944.2 nm; Bandwidth (FWHM): 38.8 nm; Peak transmittance: ≥ 97.9 % T; Passband range: 925 – 964 nm; Edge steepness: ~17 nm (10 → 90 % per edge).
What applications is BBP-940 best suited for?
BBP-940 is commonly used for Face detection and biometrics, Structured-light LiDAR, Proximity sensing, and Industrial biometrics. Face detection and biometrics - Secure facial recognition in smartphones, tablets, and IoT devices using 940 nm illumination.
Can BBP-940 be customized for size, substrate, or coating requirements?
KUPO lists the construction for BBP-940 as Ion-assisted hard-oxide; 5 – 450 mm shapes, 0.21 – 3.8 mm thick. Published custom options include CWL shifting, bandwidth tuning, custom blocking ranges, rapid prototypes. Custom format options - Round, square, and free-form blanks from 5 mm to 450 mm with thickness 0.21-3.8 mm.
What should I know about angle of incidence and durability for BBP-940?
The published angle of incidence for BBP-940 is 0° (normal incidence); custom angles available. The hard-oxide coating is built for repeated handling, heat, and cleaning.
