O01506 Longpass Filter
Long-pass filter blocking blue-green light below ≈ 540 nm while passing ≥ 92 % warm orange-to-red illumination from 550 – 780 nm.
- Passband: 550 – 780 nm, 92 – 95 % T (± 2 % ripple)
- Cut-on (T50): ≈ 550 nm
- Edge steepness: ~15 nm (10 → 90 % transition)
- Blue-green blocking: < 0.3 % T below 510 nm
(minor ~25 % ripple at 400 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
O01506 removes virtually every photon below ~540 nm, then delivers a flat,
high-transmission window from warm orange through deep red. Transmission
is essentially zero below 510 nm (aside from a modest ~25 % ripple near
400 nm); by 550 nm it rockets past 92 % and holds a 92 – 95 % plateau to
780 nm. The hard-oxide coating shrugs off heat, humidity, solvents, and
repeated cleaning. KUPO can coat 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 ship prototypes in about two weeks.
Typical uses: LED colour-tuning, orange/red fluorescence capture,
blue-glare suppression in machine vision, daylight-to-tungsten balancing
for film lighting, and AR/HUD graphics injection without blue-green leak.
Description
O01506 removes almost every photon below about 540 nm, then delivers a flat, high-transmission band from warm orange through deep red. Transmission is essentially zero below 510 nm (aside from a modest ~25 % ripple near 400 nm); by 550 nm it jumps past 92 % and holds between 92 – 95 % clear out to 780 nm, with ripple limited to ±2 %. Use it to warm LED sources, isolate orange-to-red fluorescence, or keep blue-green glare out of machine-vision cameras.
Key advantages
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Steep blue-green cutoff – ≈15 nm edge cleanly splits cool tones from warm ones, maximising colour contrast.
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High, colour-neutral passband – ≥92 % T from ~550 nm to 780 nm keeps luminance and hue stable.
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Deep short-wave suppression – <0.3 % T below 510 nm removes harsh LED peaks and protects sensors.
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Hard-oxide durability – Ion-assisted layers withstand heat, humidity, solvents, and frequent cleaning.
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Size & substrate freedom – Round, square, or custom 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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LED colour tuning – Filter cool spikes in white or RGB fixtures for cosy, amber-rich ambience.
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Fluorescence emission – Capture orange/red dyes (e.g., mCherry, Texas Red) while blocking blue-green excitation.
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Machine vision – Suppress specular blue reflections on shiny parts while keeping the red channel bright.
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Photography & cinema – Warm daylight LEDs toward a tungsten look without gels, maintaining high optical efficiency.
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AR / HUD combiners – Inject orange-to-red graphics cleanly, with zero blue-green leakage into the viewer’s eye.
Need prototypes tomorrow or volume next month? KUPO Optics can coat, dice, and ship O01506 filters to your exact spec—swiftly.
