O10405 Longpass Filter
Long-pass filter wiping out blue-green light below ≈ 515 nm while passing ≥ 92 % warm orange-to-red illumination from 535 – 750 nm.
- Passband: 535 – 750 nm, 92 – 95 % T (± 2 % ripple)
- Cut-on (T50): ≈ 535 nm
- Edge steepness: ~20 nm (10 → 90 % transition)
- Blue-green blocking: < 1 % T 390 - 490 nm
- Construction: Ion-assisted hard-oxide; 5 – 450 mm shapes, 0.21 – 3.8 mm thick
- Custom options: Edge tuning, ripple smoothing, 45° AOI, rapid prototyping
Learn more
O10405 blocks virtually all violet-to-blue-green light up to ≈ 515 nm, then
rockets past 92 % by ~535 nm and glides across a flat 92 – 95 % plateau to
750 nm with ripple held to ± 2 %. The result is warm, glare-free output for
lighting, fluorescence collection, and vision systems without harsh LED
peaks. The ion-assisted hard-oxide stack shrugs off heat, humidity,
solvents, and repeated cleaning. KUPO coats Borofloat®, soda-lime, Schott
D263 T, or Corning Eagle XG glass in any outline from 5 mm chips to 450 mm
plates (0.21 – 3.8 mm thick) and ships prototypes in about two weeks.
Typical applications: LED colour-tuning, orange/red fluorescence
emission, blue-glare suppression in machine vision, tungsten-like
warm-up of daylight LEDs for photo & cinema, and AR/HUD graphics that must
block blue-green leakage.
Description
O10405 keeps violet, blue, and most green light out, then delivers a smooth, high-transmission window from the orange band well into the deep red. Below ≈ 490 nm transmission is essentially zero; by about 545 nm it rockets past 90 % and stays above 92 % all the way to 750 nm, with ripple capped near ±2 %. Ideal for warming LED sources, capturing orange-to-red fluorescence, or removing cool-tone glare in vision systems.
Key advantages
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Steep blue-green cutoff – ≈ 20 nm edge cleanly separates 500 nm cyan-green from warm colours.
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High, colour-neutral passband – ≥ 92 % T from ~545 nm to 750 nm keeps brightness and hue consistent.
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Deep short-wave suppression – < 1 % T below 490 nm blocks harsh LED peaks and protects detectors.
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Hard-oxide durability – Ion-assisted layers shrug off heat, humidity, solvents, and repeated cleaning.
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Any size, any shape – Round, square, or free-form blanks from 5 mm to 450 mm, thickness 0.21 – 3.8 mm, on Borofloat®, soda-lime, Schott D263 T, or Corning Eagle XG.
Typical applications
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LED colour-tuning – Remove blue-green spikes from cool-white or RGB fixtures to achieve warm, amber-rich ambience.
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Fluorescence emission – Collect orange/red dyes (e.g., mCherry, Texas Red) while blocking blue/green excitation.
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Machine vision – Suppress cool reflections on shiny parts while keeping red channel bright for inspection.
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Photography & cinema – Warm daylight LEDs toward a tungsten look without gels; maintain high optical efficiency.
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AR / HUD combiners – Inject orange-to-red graphics cleanly, with zero blue-green leak into the viewer’s eye.
Need prototypes fast or volume supply? Filters are coated, diced, and shipped to your exact spec—swiftly.
