CTB-014 Color Correction Filters
CTB-014 is a blue-balancing broadband filter with a moderate cool shift: T rises from ~70 % at 390–400 nm to ~84–86 % at 440–460 nm, slopes to ~58–60 % by 520–560 nm, reaches a shallow ~54–56 % trough around 620–660 nm, then recovers to ~60–62 % near 780 nm—delivering clean, predictable cooling with modest loss (~0.25–0.3 OD mid-band).
- Function: CTB broadband filter (moderate cool shift)
- Blue weighting: ~70 % @ 390–400 nm → peak ~84–86 % @ 440–460 nm
- Mid-band trim: ~58–60 % by 520–560 nm; trough ~54–56 % @ 620–660 nm (reduces yellow/amber without magenta cast)
- Longer wavelengths: Recovers to ~60–62 % by ~780 nm; smooth, low-ripple curve
- Attenuation: ~0.25–0.3 OD mid-band; preserves usable output while shaping spectrum
- Construction & format: Durable coating on Borofloat®, Eagle XG, D263 T, or soda-lime • 5–450 mm • 0.21–3.8 mm • options: rear-AR & slight wedge
Learn more
CTB-014 emphasises ~440–470 nm to move warm sources toward daylight, with a balanced mid-band trim that avoids harsh notches or banding. Attenuation stays manageable so broadband output remains practical for lighting, imaging, and projection.
Typical applications • Lighting colour correction (toward ~5600 K) • Cameras & cinema (pre-filter for consistent WB) • Architectural/display lighting (crisper whites) • Machine vision/inspection (enhanced blue-weighted contrast) • Projectors & light engines (modest brightness trade-off).
Need test chips tomorrow or thousands next quarter? CTB-014 filters are coated and cut-to-size (including dicing) to your exact spec—fast.
Description
CTB-014 is a blue-balancing (CTB) broadband filter with a moderate cool-shift. Transmission rises from ~70% near 390–400 nm to a peak of ~84–86% around 440–460 nm, then slopes down through green to ~58–60% by ~520–560 nm. It reaches a shallow trough of ~54–56% around ~620–660 nm and recovers to ~60–62% by ~780 nm. The effect is a clean, predictable cool-tone correction with modest overall loss (mid-band ≈0.25–0.3 OD).
Key advantages
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Blue-weighted transmission — emphasises ~440–470 nm to move warm sources toward daylight.
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Balanced mid-band trim — ~56–58% through ~520–650 nm reduces yellow/amber without a magenta cast.
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Smooth, low-ripple curve — stable colourimetry with no narrow notches or banding.
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Manageable attenuation — preserves usable output while shaping the spectrum.
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Built to last — durable optical coating for stage, field, and lab use.
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Custom formats — Borofloat®, Eagle XG, or D263 T (0.21–3.8 mm) for high-temp duty to ~450 °C; soda-lime for ≤150 °C. Sizes 5–450 mm; optional rear-surface AR and slight wedge to suppress ghosts.
Typical applications
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Lighting colour correction — cool tungsten/halogen or warm LED toward ~5600 K daylight.
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Cameras & cinema — pre-filter for consistent white balance with less in-camera correction.
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Architectural & display lighting — deliver crisper whites in retail, museums, and exhibits.
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Machine vision & inspection — enhance blue-weighted contrast while keeping broadband illumination.
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Projectors & light engines — spectral shaping with a modest brightness trade-off.
Need test chips tomorrow or thousands next quarter? CTB-014 filters are coated and cut-to-size (including dicing) to your exact spec—fast.
