Y10001 Longpass Filter
Long-pass filter blocking cool blues below ~470 nm while passing ≥ 90 % warm yellow-to-red light for cosy, colour-true illumination.
- Passband: 495 – 780 nm, 92 – 95 % T (± 2 % ripple)
- Cutoff (T50): ~490 nm
- Edge steepness: ≈ 20 nm 10 → 90 % transition
- Blue blocking: < 1 % T below 470 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
Y10001 is KUPO Optics’ go-to long-pass when you need to keep the blue out
and let everything from vivid yellow through deep red sail through.
Transmission is practically zero below ~470 nm, but rockets past 90 %
by 495 nm and rides a flat 92–95 % plateau to the end of the visible range,
holding colour balance steady. Ion-assisted hard-oxide coatings shrug off
heat, humidity, solvents, and wipe-downs. Choose 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); KUPO can ship prototypes in
about two weeks.
Typical applications: warm-white & amber lighting, fluorescence
emission collection, red-channel machine vision, photographic colour
balancing, and AR/HUD combiners that must block blue glare.
Description
Y10001 is KUPO Optics’ go-to long-pass when you need to keep the blue out and let everything from vivid yellow through deep red sail through. Below about 470 nm transmission is practically zero, but by 495 nm the curve rockets past 90 %. It then rides a smooth 92–95 % plateau all the way to the end of the visible range, keeping colour balance flat and bright.
Key advantages
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High yellow-to-red throughput – ≥ 90 % T from ~495 nm to 780 nm for warm-tone illumination or detection.
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Steep blue cutoff – ≈ 20 nm transition cleanly splits cool and warm colours, maximising contrast.
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Colour-neutral plateau – Ripple stays within ±2 % so white balance and hue remain accurate across the passband.
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Hard-oxide durability – Ion-assisted layers shrug off heat, humidity, solvents, and repeated wipe-downs.
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Size & substrate freedom – Available on Borofloat®, soda-lime, Schott D263 T, or Corning Eagle XG from 5 mm to 450 mm and 0.21–3.8 mm thick.
Typical applications
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Warm-white & amber lighting – Filter out blue spike from LED sources to achieve cosy tungsten-like ambience.
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Fluorescence emission – Collect GFP-like green/yellow/red signals while blocking blue excitation light.
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Machine vision – Suppress blue glare on reflective metal or glass while keeping red channel bright for inspection.
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Photography & cinema – Balance daylight LEDs toward warmer tones or tame overly cool sources on set.
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AR / HUD combiners – Inject yellow-to-red graphics without leaking distracting blue into the eye path.
Need miniature chips, large plates, odd shapes, or rapid prototypes? KUPO Optics can coat, dice, and ship Y10001 filters to your exact requirements—fast.
