O77809 Longpass Filter
Long-pass filter blocking cyan-green (< 560 nm) while passing ≥ 92 % vivid orange-to-red light (595 – 780 nm) with colour-neutral flatness.
- Passband: 595 – 780 nm, 92 – 95 % T (± 2 % ripple)
- Cut-on (T50): ≈ 575 nm
- Edge steepness: ~15 nm (10 → 90 % transition)
- Blue-green blocking: < 0.3 % T below 515 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
O77809 trims away almost all light below ~560 nm, then delivers a broad,
high-transmission band from vivid orange through deep red. Transmission
stays under one percent up to ~575 nm, shoots past 92 % by ~595 nm, and
remains 92 – 95 % to 780 nm with ripple held inside ± 2 %. 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-green glare suppression in machine vision, warming photo/film
lighting toward a tungsten feel, and AR/HUD graphics injection without
blue-green leak.
Description
O77809 trims away almost all light below about 560 nm, then delivers a broad, high-transmission band from vivid orange through deep red. Transmission stays under 1 % up to roughly 575 nm, shoots past 92 % by ~595 nm, and remains between 92 – 95 % out to 780 nm with ripple held inside ±2 %. Use it to warm LED fixtures, isolate orange-to-red fluorescence, or strip cyan-green glare from machine-vision scenes.
Key advantages
-
Steep cyan-green cutoff – ≈15 nm edge cleanly separates cool and warm colours for crisp contrast.
-
High, flat passband – ≥92 % T from ~595 nm to 780 nm keeps brightness and hue consistent.
-
Deep short-wave suppression – <0.3 % T below 515 nm eliminates harsh LED spikes and protects detectors.
-
Hard-oxide durability – Ion-assisted layers shrug off heat, humidity, solvents, and frequent cleaning.
-
Format flexibility – Round, square, or custom 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
-
LED colour tuning – Remove cool spikes in white or RGB fixtures to achieve warm, amber-rich ambience.
-
Fluorescence emission – Collect orange/red dyes (mCherry, Texas Red, Cy3) while blocking blue-green excitation.
-
Machine vision – Suppress cyan-green reflections on shiny parts while keeping the red channel bright for inspection.
-
Photography & cinema – Warm daylight LEDs toward a tungsten look without gels, maintaining high optical efficiency.
-
AR / HUD optics – Inject orange-to-red graphics cleanly, with zero blue-green leak into the viewer’s eye path.
Need prototypes next week or volume lots next quarter? O77809 filters can be coated, diced, and shipped to your exact specifications—fast.
