CRI-14 Color Rendering Improvement Filter

CRI-14 implements a sophisticated progressive rolloff strategy across the visible spectrum. Peak transmission of 96.3 % at 775 nm contrasts with a moderate minimum of 26.6 % at 459 nm, creating a gradual gradient rather than sharp notch. The filter demonstrates clever wavelength progression: UV at 87.1 %, blue at 63.3 % (dipped at 459 nm), green declining from 54.7 %, yellow to 47.2 %, then recovery in NIR to 94.4 %. The 66.0 % average transmission reflects a balanced approach targeting sources with moderate phosphor imbalance. Green bands show intentional asymmetry (54.5 % at 510-540 vs 45.9 % at 540-580 nm), focusing suppression on longer wavelengths.

Key Advantages

• Progressive Rolloff Architecture - Gradual spectral curve from UV (87 %) to yellow (47 %) eliminates harsh transitions; sources render natural color progression without the artificial 'edge' characteristic of sharp notch filters.
• Extended NIR Optimization - 94.4 % NIR transmission preserves thermal radiation content that enhances perceived warmth; applications benefit from both color CRI and thermal ambiance optimization.
• Selective Green-Band Asymmetry - 510-540 nm transmission at 54.5 % versus 45.9 % at 540-580 nm creates a natural green gradient that removes yellow excess without aggressive green suppression.
• Ion-Assisted Hard-Oxide Multi-Layer Design - Progressive curve maintained across thermal stress and high-power operation; no notch flattening or peak broadening in 4000+ hour continuous-duty applications.
• Flexible Optical Integration - Round 5-450 mm, square, and free-form optical blanks available on Borofloat, soda-lime, D263 T, Eagle XG substrates with precise 0.21-3.8 mm thickness control.

Typical Applications

• Architectural Facade Warm Enhancement - Building exteriors lit with CRI-14 achieve incandescent-like warmth with natural progression; progressive curve eliminates the technical appearance that characterizes aggressive notch filters.
• Hospitality Ambient Environmental Control - Hotels and restaurants achieve circadian-rhythm-aware lighting that transitions naturally from warm evening tones to neutral morning illumination without spectral discontinuity.
• Theater & Performance Arts Lighting - Stage washes with progressive rolloff appear naturally warm without exaggeration; audience perceives authentic incandescent-equivalent warmth regardless of fixture distance.
• Luxury Retail Ambiance Creation - High-end stores benefit from seamless warm CRI that progresses across spectral bands; customers unconsciously perceive premium environment from natural-appearing color enhancement.
• Film & Photography Production Key Lighting - Cinematography using CRI-14 achieves warm tones without requiring aggressive color-grading in post; progressive curve renders skin tones naturally without makeup retouching.

CRI-14 prototypes available in 3-4 weeks; production supports custom sizing, substrate selection, and specialized coatings. Volume pricing available from 50 units for entertainment and hospitality integrators.