C11715 Shortpass Filter
Short-pass filter delivering vivid blue-cyan (410 – 555 nm) while crushing mid-VIS and NIR light past 600 nm for crisp, cool illumination.
- Blue passband: 410 – 555 nm, 92 – 94 % T
- Cutoff (T50): ~575 nm
- Edge steepness: ≈ 10 nm (90 → 10 % transition)
- Blocking band: < 0.5 % T 600 – 740 nm
- Construction: Ion-assisted hard-oxide dielectric; 5 – 450 mm custom shapes
- Custom options: Edge tuning, ripple smoothing, 45° AOI, large plates
Learn more
C11715 passes a bright blue–cyan band and blocks nearly everything from
yellow to infrared. Transmission jumps above 90 % by 410 nm and stays
flat (≈ 92–94 %) to ~555 nm. Just beyond 575 nm it plunges below one
percent and hugs the baseline past 740 nm, so virtually no green, red, or
IR leaks through. The ion-assisted hard-oxide stack shrugs off heat,
humidity, solvents, and frequent cleaning, and KUPO can shift edges,
smooth ripples, supply 45° AOI versions, or cut plates up to 450 mm in
roughly two weeks.
Typical applications: stage and architectural lighting, fluorescence
microscopy & cytometry, machine-vision illumination, blue-laser curing &
lithography, and AR/VR combiners needing vivid blue graphics without
green-red bleed.
Description
C11715 passes a bright blue–cyan band and blocks nearly everything from yellow to infrared. Transmission jumps above 90 % by 410 nm and stays flat—around 92–94 %—out to about 555 nm. Just beyond 575 nm it drops below 1 % and hugs the baseline all the way past 740 nm. You get a vivid blue signal with virtually no green, red, or IR leakage.
Key advantages
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High blue throughput – >90 % T from 410 nm to 555 nm for LEDs, lasers, or fluorescent lamps.
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Sharp 575 nm cutoff – ~10 nm edge cleanly separates blue from warmer colours, keeping colour purity high.
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Deep blocking band – <0.5 % T from 600 nm to 740 nm protects sensors, reduces glare, and cuts stage heat.
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Hard-oxide coating – Handles heat, humidity, solvents, and frequent cleaning without spectral drift.
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Fast custom options – Edge tuning, ripple smoothing, 45 ° AOI versions, and plates up to 300 mm in ~2 weeks.
Typical applications
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Stage & architectural lighting – Slot into ellipsoidals or PARs for crisp ice-blue washes without red/IR heat; saves on gels and lamp wear.
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Fluorescence microscopy & cytometry – Excite CFP/FITC dyes while blocking longer-wavelength emissions for cleaner detection.
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Machine-vision lighting – Pair with 450 nm LED bars to sharpen contrast on plastics, pills, and anti-counterfeit inks.
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Blue-laser lithography & curing – Pass 405–450 nm lines for photoresists while eliminating red/IR that can warp substrates.
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AR / VR optical combiners – Inject vivid blue graphics without leaking green–red light into the eye path.
Need chips as small as 10 mm, custom shapes, or large OEM volumes? KUPO Optics can prototype and ship C11715 to match your specs—fast.
