G73611 Broad Bandpass Filter
Narrow green filter (518 – 540 nm, > 90 % T) with < 1 % UV/blue & red leakage and a modest 35 % IR peek near 780 nm.
- Green passband: 518 – 540 nm, > 90 % T
- UV/blue block: < 1 % T @ 400 – 490 nm
- Red block: < 1 % T @ 575 – 735 nm
- IR tail: ~35 % T @ 780 nm (optional)
- Construction: Ion-assisted hard-oxide; 5 – 450 mm, 0.21 – 3.8 mm thick
- Custom options: AOI tuning, ripple smoothing, rapid prototypes
Learn more
G73611 transmits a narrow slice of saturated green while driving
nearly every other wavelength to background. Transmission clears 90 % at ~518 nm,
stays above that mark to ~540 nm, and dives below one percent by ~575 nm.
UV/blue is suppressed down to detector noise, and yellow-through-red energy
remains near zero until a gentle IR tail rises above 750 nm, peaking around
35 % at ~780 nm—handy for alignment or dual-band sensing without extra optics.
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 channels in multispectral
cameras, saturated stage beams, and AR waveguides that need bright green
injection plus a faint IR reference.
Description
G73611 transmits a narrow, high-clarity slice of green while holding nearly every other wavelength to background level. Transmission crosses 90 % at roughly 518 nm, stays above 90 % through about 540 nm, and falls below 1 % by ~575 nm. UV/blue energy is suppressed to near-zero save for a small bump below 390 nm, and yellow-through-red light remains in the noise until a gentle tail rises above 750 nm, reaching ~35 % at 780 nm. Choose G73611 when you need saturated green with almost no bleed elsewhere, yet still want a faint far-IR “peek” for alignment or dual-band sensing.
Key advantages
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Pure 518 – 540 nm passband – > 90 % transmission delivers vivid, high-brightness green.
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Deep broadband blocking – < 1 % T from 400 – 490 nm and 575 – 735 nm suppresses UV/blue noise and red flare.
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Moderate IR tail – ~35 % transmission near 780 nm provides an optional alignment or reference channel without extra optics.
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Hard-oxide durability – Ion-assisted coating shrugs off heat, humidity, solvents, and repeated cleaning.
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Flexible formats – Round, square, or free-form blanks 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 & cytometry – Excite FITC-like dyes while dumping autofluorescence and IR.
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Machine-vision illumination – Pair with green LEDs or lasers to maximise SNR in reflective-part inspection.
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Projection & display engines – Channel green primaries cleanly in laser-phosphor or RGB-LED light paths.
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Multispectral & hyperspectral cameras – Provide a discrete green band with a faint IR reference for vegetation or stress indexing.
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Stage & architectural lighting – Produce razor-saturated green beams or washes that stay bright on stage, with the IR tail available for tracking systems.
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Augmented-reality waveguides – Inject bright green imagery into see-through combiners while keeping the substrate cool.
Need prototypes next week or production lots next quarter? G73611 filters can be coated, diced, and shipped to your exact specifications—fast.
