アイテム説明
BH-A17 is KUPO Optics’ precision 815–840 nm passband filter built for diode-laser illumination, fluorescence excitation, and NIR machine-vision tasks that demand surgical wavelength selection. A densely packed hard-oxide stack opens a tall, ≥93.5 % transmission window centred near 830 nm while crushing stray light to <0.5 % across the remainder of the visible band. Two deliberately modest “peek” windows—one around 390 nm (~20 % T) and another near 1120 nm (~18 % T)—provide simple alignment beacons or multispectral reference points without compromising primary-band contrast.
Key advantages
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High-contrast 820 nm passband — ≥92 % peak T with <8 nm edge steepness delivers crisp, high-power throughput for 808/820 nm diode lasers.
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Deep out-of-band blocking — <1 % T from 430 nm to 760 nm and 880 nm to 1125 nm shields sensors from visible flare and second-order IR.
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Built-in alignment windows — Controlled sidebands at ~390 nm and ~1120 nm simplify coaxial beam set-up or enable two-wavelength sensing.
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Hard-oxide durability — Ion-assisted layers shrug off heat, humidity, chemicals, and lens-wipe abuse on production floors.
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Rapid customisation — Centre wavelength trims, alternative AOIs, or elimination of side windows available in lead times as short as two weeks.
Typical applications
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808/820 nm diode-laser modules — Clean up pump beams for medical therapy, Raman, or fiber-coupling systems.
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Fluorescence imaging — Excite Cy7-like dyes while dumping visible autofluorescence and stray IR.
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NIR machine-vision lighting — Pair with 820 nm LED bars to maximise signal-to-noise on silicon cameras.
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LiDAR & ToF sensors — Tighten receiver bandwidth around 830 nm transmitters to boost eye-safety margins.
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Multispectral crop monitoring — Use as a discrete NIR channel while the 390 nm peek doubles for UV-A index reference.
Need AR-coated backs, odd-shaped blanks, or volume OEM supply? KUPO Optics prototypes and ships BH-A17 variants fast—from 5 mm chips to 450 mm wafers—to keep your project moving.
