BBP-783 Bandpass Filter
BBP-783 isolates the ~783 nm channel with ~90–92 % peak transmission and near-baseline leakage through most of the visible–NIR—built for 780–785 nm illumination and sensing.
- Main passband (T): ~90–92 % T @ ~790 – 805 nm
- Cut-on / cut-off: Steep edges around the ~780–810 nm region
- Out-of-band (VIS–NIR): ~0–2 % T across ~450 – 1100 nm
- UV/blue leak: ~30–35 % T @ 390 – 420 nm (optional extra blocking)
- SWIR window: ~65–70 % T @ 1170 – 1180 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-783 is a near-infrared bandpass centred around ~783 nm, delivering a narrow
high-transmission peak (~90–92 %) in the ~790–805 nm region with steep edges that rapidly suppress
out-of-band light. Outside the main window, transmission stays near baseline (~0–2 %) across most of
~450–1100 nm to improve signal-to-noise under mixed illumination.
Two off-band features are worth noting: a visible/near-UV leak around ~390–420 nm (up to ~30–35 % T)
and a strong SWIR window beyond ~1.15 µm (rising to ~65–70 % near ~1170–1180 nm and remaining
elevated toward ~1200 nm). If your source/detector is sensitive in those regions, KUPO can add additional
blocking stacks to suppress one or both bands.
Typical uses: 780–785 nm illumination for machine vision, reflectance/absorption sensing,
optical beacons and tracking, photometry/calibration, and industrial inspection requiring a clean
~783 nm channel. 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
BBP-783 is a near-infrared bandpass filter centred around ~783 nm. It delivers a narrow, high transmission peak of about ~90–92% around ~790–805 nm with steep edges that quickly suppress out-of-band light. Outside the main passband, transmission stays near the baseline across most of ~450–1100 nm (generally ~0–2% T). The spectrum also shows two notable off-band features: a visible/near-UV leak around ~390–420 nm (peaking roughly ~30–35% T) and a strong SWIR window beyond ~1.15 µm (reaching ~65–70% T near ~1170–1180 nm and remaining elevated toward ~1200 nm), which are worth noting if your system is sensitive in those regions.
Key advantages
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High 783 nm throughput: ~90–92% T at the main passband peak for efficient 780 nm-class LED/laser use.
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Narrow band selection: Tight spectral window around ~783 nm improves contrast by rejecting adjacent wavelengths.
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Low out-of-band leakage (VIS–NIR): Near-baseline transmission across most of ~450–1100 nm reduces background and improves signal-to-noise.
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Secondary band awareness (UV/blue): A noticeable feature appears around ~390–420 nm (up to ~30–35% T); extra blocking can be added if required.
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SWIR leakage awareness: Transmission rises strongly beyond ~1.15 µm (up to ~65–70% near ~1170–1180 nm); additional blocking can be added if required.
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Production-ready build: Durable dielectric coating; optional rear-surface anti-reflection and slight wedge available to suppress ghosts/flare.
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Custom formats: Borofloat®, Eagle XG or D263 T (0.21–3.8 mm) for high-temp use to ~450 °C; economical soda-lime for ≤150 °C. Custom sizes 5–450 mm.
Typical applications
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780–785 nm illumination: Improve signal-to-background for machine vision and controlled IR imaging.
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Biometrics and sensing: Isolate the ~783 nm channel for reflectance or absorption measurements.
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Optical beacons and tracking: Pass the 780 nm-class marker band while rejecting broadband clutter.
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Photometry and calibration: Band-limited 783 nm channel for detector testing and system characterisation.
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Industrial inspection: Reduce broadband glare while preserving the working wavelength near 783 nm.
Need test chips tomorrow or thousands next quarter? BBP-783 filters are coated and cut-to-size (including dicing) to your exact spec—fast.
