BBP-850C Bandpass Filter
BBP-850C isolates the 850 nm channel with near-unity transmission (~97–100 % T from 830–900 nm) and near-baseline leakage elsewhere—built for NIR illumination and sensing.
- Main passband (T): ~97–100 % T @ 830 – 900 nm
- Cut-on / cut-off: Steep edges near ~820 nm and ~910 nm
- Out-of-band (VIS–NIR): ~0–1 % T across 300 – 820 nm
- Out-of-band (NIR): ~0–1 % T across 920 – 1200 nm
- Ghost control: Optional rear AR and slight wedge available
- Substrates: Borofloat®, Eagle XG, D263 T (≤ 450 °C), soda-lime (≤ 150 °C)
- Size / thickness: 5 – 450 mm • 0.21 – 3.8 mm (custom cut & dicing)
Learn more
BBP-850C is a high-efficiency near-infrared bandpass centred around 850 nm,
delivering ~97–100 % transmission across ~830–900 nm with steep edges that rapidly suppress
out-of-band light. Outside the main window, transmission stays near baseline (~0–1 %) across
most of the visible and near-IR (300–820 nm and ~920–1200 nm), improving contrast and
reducing sensor bloom under mixed illumination.
Typical uses: 850 nm IR illumination for machine vision and night vision, biometrics/access
control (iris/face), IR beacons and tracking markers, reflectance/absorption photometry, and industrial
inspection where the 850 nm band must remain clean.
KUPO supplies rear-surface AR, slight wedge, and rapid custom cutting—from small test chips to 450 mm
plates—on high-temperature glass (Borofloat®, Eagle XG, D263 T) or economical soda-lime.
Description
The BBP-850C is a premium near-infrared filter centered at 879 nm with an 81 nm FWHM passband (821-902 nm). Peak transmission reaches an exceptional 99.7 % - the highest among all 850 nm family variants. This near-perfect optical efficiency combined with clean SWIR rejection (just 0.5 %) makes BBP-850C the gold-standard choice for applications requiring maximum signal throughput with minimal thermal leakage.
Key Advantages
- Highest 850 family peak – 99.7 % transmission - unmatched optical efficiency among all 850 nm variants maximizes signal
- Clean SWIR blocking – 0.5 % SWIR leakage - exceptional thermal isolation for precision 850 nm applications
- Hard-oxide multilayer durability – Ion-assisted deposition provides outstanding stability across thermal cycling and harsh environments
- Custom format availability – 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 accommodate diverse designs
Typical Applications
- Premium machine vision – Ultra-high-brightness 850 nm imaging in mission-critical industrial and medical applications
- Biomedical diagnostics – Tissue imaging and non-invasive measurement where signal efficiency is paramount
- Precision measurement – Scientific instrumentation requiring maximum light collection and minimal thermal interference
- Advanced sensing – High-performance autonomous vehicle and robotics perception systems using 850 nm
- Fiber optics – Ultra-low-loss wavelength filtering in telecommunications and precision sensor networks
Deploy BBP-850C for maximum 850 nm efficiency with rapid custom manufacturing. Ideal for high-performance applications where optical losses must be minimized.
FAQ
BBP-850C FAQ
What is BBP-850C and what is it used for?
BBP-850C is a Ultra-high-performance 850 nm bandpass with 99.7 % peak. The BBP-850C is a premium near-infrared filter centered at 879 nm with an 81 nm FWHM passband (821-902 nm). Peak transmission reaches an exceptional 99.7 % - the highest among all 850 nm family variants. Common uses include Premium machine vision, Biomedical diagnostics, Precision measurement, and Advanced sensing.
What are the key optical specs of BBP-850C?
Key published specs for BBP-850C include Centre wavelength (CWL): 861.4 nm; Bandwidth (FWHM): 80.5 nm; Peak transmittance: ≥ 99.7 % T; Passband range: 821 – 901 nm; Edge steepness: ~17 nm (10 → 90 % per edge).
What applications is BBP-850C best suited for?
BBP-850C is commonly used for Premium machine vision, Biomedical diagnostics, Precision measurement, and Advanced sensing. Premium machine vision - Ultra-high-brightness 850 nm imaging in mission-critical industrial and medical applications.
Can BBP-850C be customized for size, substrate, or coating requirements?
KUPO lists the construction for BBP-850C 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 availability - 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-850C?
The published angle of incidence for BBP-850C is 0° (normal incidence); custom angles available. The hard-oxide coating is built for repeated handling, heat, and cleaning.
