CRI-32 Color Rendering Improvement Filter
CRI-32 warms and smooths spiky LED/HMI spectra by trimming blue and yellow-green while preserving strong reds: deep-blue ~5–12 % T (380–420 nm) rising to ~40–45 % near 455–465 nm, a blue-green dip ~30–35 % at 500–520 nm, then a steep red lift to ~75–80 % at 590–630 nm and ~88–92 % by 760–780 nm.
- Function: CRI/TLCI improvement filter; trims blue & yellow-green, preserves long red
- Deep-blue control: ~5–12 % T @ 380–420 nm → ~40–45 % near 455–465 nm
- Blue-green shaping: Dip ~30–35 % T around 500–520 nm (moderates 500–560 nm)
- Red lift & throughput: ~75–80 % T @ 590–630 nm; ~88–92 % T by 760–780 nm
- Colour impact: Raises CRI/TLCI & R9; warms CCT; broad shaping avoids magenta/green casts
- Construction & format: Durable dielectric on Borofloat®, Eagle XG, D263 T, or soda-lime • 5–450 mm • 0.21–3.8 mm • options: rear-AR & slight wedge
Learn more
By moderating blue (≈380–500 nm) and yellow-green (≈500–560 nm) while emphasizing long red, CRI-32 raises CRI/TLCI and R9, shifts overly cool sources toward neutral/warm, and smooths spectral gaps—without introducing magenta/green casts or banding.
Typical applications • Cinema/TV lighting (lift TLCI/CRI; better skin tones) • Photography & events (warmer faces/textiles) • Retail/museum/hospitality (reduced green cast; natural reds) • Architectural & display (refine luminaires) • Machine vision (tame blue/green glare; balance channels where red features matter).
Need test chips tomorrow or thousands next quarter? CRI-32 filters are coated and cut-to-size (including dicing) to your exact spec—fast.
Description
CRI-32 is a colour-rendering improvement (CRI) filter that warms and smooths spiky LED/HMI spectra by trimming blue and yellow-green while preserving strong reds. Transmission is low in the deep blue (~5–12% from 380–420 nm), rises to ~40–45% near 455–465 nm, dips through blue-green to ~30–35% around 500–520 nm, then makes a steep red lift between ~590–630 nm to ~75–80%, continuing up to ~88–92% by ~760–780 nm.
Key advantages
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Raise CRI/TLCI and R9 — moderates blue (~380–500 nm) and yellow-green (~500–560 nm) while emphasising long-red for truer skin, food, wood, and fabrics.
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Warm CCT, smoother SPD — shifts overly cool sources toward neutral/warm and evens out spectral gaps.
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High red throughput — ≈80–92% T above ~620 nm preserves deep-red fidelity and saturation.
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Broad, predictable shaping — gentle blue/green control avoids harsh magenta/green casts or banding.
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Built for production — durable dielectric stack for sets, stages, and architectural fixtures; optional rear-surface AR and slight wedge to suppress ghosts.
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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.
Typical applications
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Cinema/TV lighting — lift TLCI/CRI and skin-tone accuracy without heavy in-camera correction.
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Photography & events — warmer, more flattering faces and textiles under LED or HMI.
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Retail, museum & hospitality — reduce green cast and reveal natural reds in merchandise and art.
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Architectural & display — refine off-the-shelf luminaires for premium colour.
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Machine vision — tame blue/green glare and balance channels when red features matter.
Need test chips tomorrow or thousands next quarter? CRI-32 filters are coated and cut-to-size (including dicing) to your exact spec—fast.
