O2210 Longpass Filter
Long-pass filter blocking cool cyan (< 560 nm) while passing 90 – 94 % warm orange-to-red light (≈ 590 – 770 nm) with colour-neutral flatness.
- Passband: 590 – 770 nm, 90 – 94 % T (± 2–3 % ripple)
- Cut-on (T50): ≈ 575 nm
- Edge steepness: ~15 nm (10 → 90 % transition)
- Blue-green blocking: < 1 % T below 550 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
O2210 rejects most light below ~560 nm, crossing 50 % transmission near
575 nm and clearing 90 % by ~590 nm. It then holds a stable 90–94 %
plateau to at least 770 nm with ripple contained to ±2–3 %. The
ion-assisted hard-oxide stack resists heat, humidity, solvents, and
repeated cleaning. KUPO can supply 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 ship prototypes in about two weeks.
Typical uses: LED colour-tuning, orange/red fluorescence
collection, cyan-glare suppression in machine vision, warming cinema
lighting toward tungsten, and AR/HUD graphics injection without
blue-green bleed.
Description
O2210 rejects most light below roughly 560 nm and then passes a broad, colour-neutral band from orange into the deep red. In the measured sample, transmission stays under 1 % through 550 nm, crosses 50 % near 575 nm, clears 90 % by about 590 nm, and holds between 90 % and 94 % to at least 770 nm with spectral ripple of ±2 – 3 %. Use it whenever you need to tame cool-tone glare, isolate orange-red fluorescence, or warm up LED or laser sources without resorting to gels.
Key advantages
-
Reliable cyan cutoff – 50 % cut-on ≈ 575 nm; <1 % T maintained through 550 nm to minimise blue/green leakage.
-
High, flat passband – 90 – 94 % T from ~590 nm to 770 nm keeps luminance and hue stable without excessive ripple.
-
Hard-oxide durability – Ion-assisted coating tolerates heat, humidity, solvents, and repeated cleaning cycles.
-
Flexible formats – 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 substrates.
Typical applications
-
LED colour tuning – Soften the blue spike in cool-white or RGB fixtures to create warmer, amber-rich ambience.
-
Fluorescence emission – Collect orange/red probes (Cy3, mCherry, Texas Red) while blocking cyan excitation lines.
-
Machine vision – Strip cyan reflections from shiny parts while keeping the red channel bright for defect detection.
-
Photography & cinema lighting – Warm daylight LED panels toward a tungsten look without sacrificing efficiency.
-
AR / HUD combiners – Inject orange-to-red graphics cleanly, with negligible blue-green bleed toward the viewer.
Need a quick prototype or a volume run? Filters can be coated, diced, and shipped to your exact specification—fast, and with realistic performance figures you can trust.
