G2812 Broad Bandpass Filter
Emerald-green filter (515 – 555 nm, > 90 % T) with sub-1 % UV/blue & red leakage and a very mild < 5 % IR tail beyond 760 nm.
- Green passband: 515 – 555 nm, > 90 % T
- UV/blue block: < 1 % T @ 390 – 490 nm
- Red/IR block: < 1.5 % T @ 607 – 765 nm
- IR tail: < 5 % T beyond 760 nm
- Construction: Ion-assisted hard-oxide; 5 – 450 mm, 0.21 – 3.8 mm thick
- Custom options: AOI tuning, ripple flattening, rapid prototypes
Learn more
G2812 delivers a razor-clean slice of green while driving nearly
every other wavelength into the noise. Transmission climbs above 90 % near 515 nm,
holds a flat plateau through ~555 nm, and drops below 1.5 % by ~607 nm.
UV/blue energy is kept near zero (aside from a small ≈5 % blip around 390 nm that
KUPO can flatten on request), and yellow-to-near-IR light remains suppressed out
to ~750 nm—only a gentle tail stays under 5 % at 780 nm.
KUPO coats Borofloat®, soda-lime, Schott D263 T, or Corning Eagle XG substrates
cut to any outline—from 5 mm chips to 450 mm plates—with thicknesses of
0.21 – 3.8 mm, and can ship prototypes in about two weeks.
Typical uses: FITC-style fluorescence excitation, green-LED machine vision,
RGB laser/LED projection, discrete green bands in multispectral cameras, saturated
stage lighting, and AR waveguides needing bright green injection without UV/IR heat.
Description
G2812 delivers a razor-clean slice of saturated green while driving almost every other wavelength down into the noise. Transmission climbs above 90 % at roughly 515 nm, holds a flat > 90 % plateau through about 555 nm, and drops below 1.5 % by ~607 nm. UV/blue energy is kept near zero (aside from a small ≈5 % blip around 390 nm that can be flattened on request), and yellow-to-near-IR light remains suppressed right out to 750 nm—where only a gentle tail stays under 5 %. When your system demands vivid green and virtually no leakage elsewhere, G2812 keeps the beam crystal-clear.
Key advantages
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Pure 515 – 555 nm passband – > 90 % transmission gives bright, colour-accurate green for imaging or illumination.
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Broadband blocking – < 1 % T from 390 – 490 nm and <1.5% T 607 – 765 nm eliminates UV/blue noise and red flare.
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Minimal IR tail – < 5 % beyond 760 nm avoids spurious NIR pickup in most sensors.
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Hard-oxide durability – Ion-assisted coating resists heat, humidity, solvents, and repeated cleaning cycles.
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Customisable formats – Round, square, or free-form shapes from 5 mm to 450 mm, 0.21 – 3.8 mm thick, on Borofloat®, soda-lime, Schott D263 T, or Corning Eagle XG glass.
Typical applications
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Fluorescence microscopy & flow cytometry – Excite FITC-class dyes while dumping autofluorescence and IR.
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Machine-vision illumination – Pair with green LEDs/lasers to boost SNR in reflective-part inspection.
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Projection & display engines – Channel the green primary cleanly in laser-phosphor or RGB-LED light paths.
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Multispectral & hyperspectral cameras – Supply a discrete green band for vegetation or stress indexing.
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Stage & architectural lighting – Produce razor-saturated green beams or washes that stay bright without heating gels.
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Augmented-reality waveguides – Inject bright green imagery into see-through combiners while leaving bandwidth free for NIR tracking.
Need prototypes in a week or high-volume lots next quarter? G2812 filters can be coated, diced, and shipped to your exact specifications—fast.
