BBP-905 Bandpass Filter
BBP-905 isolates the 905 nm channel with ~92–95 % peak transmission and near-baseline leakage across VIS–NIR—ideal for ranging, beacons, and outdoor IR systems.
- Peak transmission: ~92–95 % T near 905 nm
- Band edges: Steep cut-on/cut-off around ~850–950 nm
- Out-of-band: ~0–2 % T across 300 – 850 nm and 960 – 1050 nm
- SWIR tail: ~10–15 % T by ~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-905 is a near-infrared bandpass centred on 905 nm, delivering a high
transmission window (~92–95 %) with steep edges that rapidly suppress out-of-band light.
Outside the passband, transmission remains close to baseline (~0–2 %) across most of the
visible and near-IR (300–850 nm and ~960–1050 nm), improving contrast and reducing
sensor bloom under mixed illumination.
One note for SWIR-sensitive detectors: transmission can rise again beyond ~1100 nm and reach
~10–15 % by ~1200 nm. If your system responds in that range, KUPO can add an
additional blocking stack to fully suppress the tail.
Typical uses: 905 nm illumination for machine vision, time-of-flight and ranging,
IR beacons/tracking, reflectance/absorption photometry, and industrial inspection where a
clean 905 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
BBP-905 is a near-infrared bandpass filter centred around 905 nm. It delivers a high transmission window of about ~92–95% in the 900 nm region, with steep edges that quickly suppress out-of-band light. Outside the passband, transmission stays near the baseline across most of 300–850 nm and ~960–1050 nm (generally ~0–2% T), with small residual ripples. The spectrum shows a modest rise again beyond ~1100 nm, reaching roughly ~10–15% T by ~1200 nm, which is worth noting for SWIR-sensitive detectors.
Key advantages
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High 905 nm throughput: ~92–95% T at the passband peak for efficient 905 nm LED and laser-diode use.
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Steep band edges: Rapid cut-on and cut-off around the ~850–950 nm region for clean spectral separation.
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Low out-of-band leakage (VIS–NIR): Near-baseline transmission across most of 300–850 nm and ~960–1050 nm reduces background and improves contrast.
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SWIR leakage awareness: Transmission rises beyond ~1100 nm and can reach ~10–15% by ~1200 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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905 nm IR illumination: Improve signal-to-background for machine vision, sensing, and outdoor IR systems.
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Time-of-flight and ranging: Isolate 905 nm emitters from ambient light for more stable depth/distance measurements.
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IR beacons and tracking: Pass the 905 nm marker band while rejecting visible clutter.
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Optical sensing and photometry: Clean 905 nm channel for reflectance and absorption measurements.
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Industrial inspection: Reduce broadband glare while preserving the 905 nm working wavelength.
Need test chips tomorrow or thousands next quarter? BBP-905 filters are coated and cut-to-size (including dicing) to your exact spec—fast.
