Y1002 Longpass Filter
Long-pass filter blocking harsh blue (< 480 nm) while passing ≥ 92 % warm yellow-to-red light from 500 – 750 nm for cosy, colour-true output.
- Passband: 500 – 750 nm, 92 – 95 % T (± 2 % ripple)
- Cut-on (T50): ≈ 495 nm
- Edge steepness: ~15 nm (10 → 90 % transition)
- Blue blocking: < 1 % T below 480 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
Y1002 stops nearly all violet-to-blue light below ~480 nm, then leaps past
92 % by ~500 nm and holds a flat 92 – 95 % plateau out to 750 nm before a gentle roll-off.
The blue cutoff (~15 nm 10→90 % edge) cleanly separates cool and warm tones, while ripple stays within ±2 % for
accurate colour rendering. 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 ships prototypes in about two weeks.
Typical uses: warming LED fixtures, collecting GFP/YFP/RFP fluorescence, red-channel machine vision,
photo-film colour balancing, and AR/HUD combiners that must block blue glare.
Description
Y1002 is KUPO Optics' crisp ≈495 nm cut-on filter: it stops nearly all violet-to-blue light, then lets a broad, colour-neutral band from green through deep red reach the sensor. Below 480 nm transmission is essentially zero; by ~500 nm it leaps past 92 % and stays between 92 – 95 % right out to 750 nm before a gentle roll-off. Ideal for warming cool LED sources, protecting detectors from blue glare, or isolating fluorescence emissions.
Key advantages
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Wide yellow-to-red window – ≥ 92 % T from ~500 nm to 750 nm keeps warm tones bright.
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Steep blue cutoff – ~15 nm edge cleanly separates blue from green for high colour contrast.
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Flat spectral plateau – Ripple limited to ±2 % so colour rendering stays true across the passband.
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Hard-oxide durability – Ion-assisted coating shrugs off heat, humidity, solvents, and repeated cleaning.
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Flexible formats – Any outline 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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Lighting design – Filter out harsh blue peaks in LED fixtures to achieve cosy tungsten-like ambience.
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Fluorescence imaging – Collect GFP/YFP/RFP emissions while blocking blue excitation lines.
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Machine vision – Suppress blue reflections on metal or glass while keeping red channel bright.
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Photography & cinema – Warm up daylight LEDs or HMI sources without gels; maintain high transmission.
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AR / HUD combiners – Inject yellow-to-red graphics cleanly, with zero blue leak into the viewer’s eye path.
Need rapid prototypes, odd shapes, or volume supply? KUPO Optics can coat, dice, and ship Y1002 filters to your exact specs—fast.
