BBP-730 Bandpass Filter
BBP-730 isolates the 730 nm channel with ~96–99 % throughput across ~690–760 nm and near-baseline leakage elsewhere—ideal for sensing and controlled NIR imaging.
- Main passband (T): ~96–99 % T @ 690 – 760 nm
- Cut-on / cut-off: Steep edges near ~680 nm and ~770 nm
- Out-of-band (VIS–NIR): ~0–2 % T across 300 – 680 nm
- Out-of-band (NIR): ~0–2 % T across 780 – 1100 nm
- SWIR peak: ~80–85 % T @ 1180 – 1200 nm (optional extra blocking)
- 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-730 is a near-infrared bandpass centred around 730 nm, delivering
~96–99 % transmission across ~690–760 nm with steep edges that rapidly suppress
out-of-band light. Outside the main window, transmission stays near baseline (~0–2 %)
across most of the visible and near-IR (300–680 nm and ~780–1100 nm), improving
contrast under mixed illumination.
Note for SWIR-sensitive detectors: a strong secondary transmission peak can appear near
~1180–1200 nm and reach ~80–85 % transmission. If your sensor responds beyond
1.1 µm, KUPO can add an additional blocking stack to fully suppress this SWIR band.
Typical uses: 730 nm illumination for machine vision, reflectance/absorption sensing,
vegetation-index research, photometry and detector calibration, and industrial inspection where
a clean 730 nm channel is required. 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-730 is a near-infrared filter centered at 716 nm with an 83 nm FWHM passband (687-770 nm). Peak transmission reaches an exceptional 99.0 % - among the highest in the KUPO catalog. This outstanding optical efficiency, combined with broad NIR coverage, makes BBP-730 the ideal choice when maximum light collection and minimal optical losses are paramount. The intentional 14.3 % SWIR transparency provides a secondary sensing window.
Key Advantages
- Exceptional peak transmission – 99.0 % at center wavelength - near-unity efficiency minimizes optical losses in NIR systems
- Broad NIR passband – 83 nm FWHM from 687-770 nm captures wide 700-800 nm family range for flexible applications
- Hard-oxide multilayer durability – Ion-assisted deposition provides stable performance across thermal cycling and harsh environments
- Custom format flexibility – Round, square, and free-form blanks from 5 mm to 450 mm with thickness 0.21-3.8 mm available
- Substrate variety – Borofloat, soda-lime, Schott D263 T, and Corning Eagle XG accommodate diverse optical designs
Typical Applications
- High-efficiency NIR systems – Maximum light collection in sensitive imaging where optical losses must be minimized
- Scientific research – Precision photometry and spectroscopic analysis in 700-800 nm window
- Medical diagnostics – Tissue imaging and non-invasive diagnostic instruments requiring high signal efficiency
- Dual-band sensing – Primary NIR channel with secondary SWIR transparency for thermal and visible fusion
- Astronomy and remote sensing – High-efficiency near-infrared detection for astronomical and earth observation instruments
Deploy BBP-730 in your high-efficiency NIR system with rapid prototyping and custom manufacturing. Supports both single-unit evaluation and full-scale production.
FAQ
BBP-730 FAQ
What is BBP-730 and what is it used for?
BBP-730 is a Exceptional NIR bandpass with 99 % peak transmission. The BBP-730 is a near-infrared filter centered at 716 nm with an 83 nm FWHM passband (687-770 nm). Peak transmission reaches an exceptional 99.0 % - among the highest in the KUPO catalog. Common uses include High-efficiency NIR systems, Scientific research, Medical diagnostics, and Dual-band sensing.
What are the key optical specs of BBP-730?
Key published specs for BBP-730 include Centre wavelength (CWL): 728.2 nm; Bandwidth (FWHM): 83.3 nm; Peak transmittance: ≥ 99.0 % T; Passband range: 686 – 769 nm; Edge steepness: ~17 nm (10 → 90 % per edge).
What applications is BBP-730 best suited for?
BBP-730 is commonly used for High-efficiency NIR systems, Scientific research, Medical diagnostics, and Dual-band sensing. High-efficiency NIR systems - Maximum light collection in sensitive imaging where optical losses must be minimized.
Can BBP-730 be customized for size, substrate, or coating requirements?
KUPO lists the construction for BBP-730 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 flexibility - Round, square, and free-form blanks from 5 mm to 450 mm with thickness 0.21-3.8 mm available.
What should I know about angle of incidence and durability for BBP-730?
The published angle of incidence for BBP-730 is 0° (normal incidence); custom angles available. The hard-oxide coating is built for repeated handling, heat, and cleaning.
