O16412 Longpass Filter
Long-pass filter blocking cyan (< 560 nm) while passing 92–94 % warm orange-to-red light (610 – 770 nm) for glare-free, colour-rich output.
- Passband: 610 – 770 nm, 92 – 94 % T (± 2–3 % ripple)
- Cut-on (T50): ≈ 595 nm
- Edge steepness: ~15 nm (10 → 90 % transition)
- Blue-green blocking: < 1 % T below 560 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 prototypes
Learn more
O16412 drops transmission below one percent right up to ~560 nm, hits the
50 % mark around 595 nm, clears 90 % by ~610 nm, and rides a 92–94 %
plateau to at least 770 nm with ripple held within ±2–3 %. 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 substrates in any outline—from 5 mm chips to 450 mm plates,
0.21 – 3.8 mm thick—and can ship prototypes in about two weeks.
Typical uses: LED colour tuning, orange/red fluorescence capture,
cyan-glare suppression in machine vision, daylight-to-tungsten warming for
film lighting, and AR/HUD graphics injection without blue-green bleed.
Description
O16412 drops transmission to <1 % all the way to about 560 nm, passes the 50 % mark near 595 nm, clears 90 % by roughly 610 nm, and then rides a 92–94 % plateau out beyond 770 nm with ripple held to ±2–3 %. The profile is ideal for warming LED or laser sources, capturing orange-to-red fluorescence, or removing cyan glare from machine-vision scenes.
Key advantages
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Reliable cyan cut-on – 50 % wavelength ≈ 595 nm; < 1 % T maintained through 560 nm to minimise blue/green leakage.
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High, flat passband – 92–94 % T from ~610 nm to 770 nm keeps luminance and hue stable.
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Hard-oxide durability – Ion-assisted layers tolerate heat, humidity, solvents, and repeated cleaning.
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Format flexibility – Round, square, or custom shapes from 5 mm to 450 mm, thickness 0.21–3.8 mm, on Borofloat®, soda-lime, Schott D263 T, or Corning Eagle XG glass.
Typical applications
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LED colour tuning – Remove cool spikes in white or RGB fixtures to create warm, amber-rich ambience.
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Fluorescence emission – Collect orange/red probes (Cy3, mCherry, Texas Red) while blocking cyan excitation.
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Machine vision – Strip cyan reflections from shiny parts while keeping the red channel bright for defect detection.
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Photography & cinema – Warm daylight LED panels toward a tungsten look without gels.
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AR / HUD optics – Inject orange-to-red graphics cleanly, with negligible blue-green bleed toward the viewer.
Need quick prototypes or high-volume supply? O16412 filters can be coated, diced, and shipped to your exact specifications—fast.
