CRI-11 Color Rendering Improvement Filter

CRI-11 employs a gentler correction strategy than aggressive variants in the series. Peak transmission of 95.8 % at 688 nm combines with a modest minimum of 40.5 % at 457 nm, creating a rolling notch rather than a sharp valley. The broadband approach maintains relatively flat response across visible spectrum - UV at 88.5 %, blue at 72.6 %, green at 77.3 %, yellow at 69.6 %, red at 78.1 %. The highest average transmission in the series at 79.4 % makes CRI-11 ideal for applications prioritizing light efficiency alongside moderate CRI improvement. Green bands remain balanced (74.7 % and 69.1 %), preserving natural color saturation.

Key Advantages

• Highest Average Transmission - 79.4 % average transmission delivers maximum practical brightness while improving CRI by 3-5 points; ideal for applications where lumen output cannot decrease, such as architectural and general lighting.
• Gentle Blue Suppression - 457 nm minimum at 40.5 % creates subtle blue reduction rather than aggressive elimination; sources appear warm without the artificial 'forced incandescent' look of extreme filters.
• Balanced Full-Spectrum Response - All spectral bands maintain 70-88 % transmission, ensuring comprehensive visible-spectrum accuracy and natural color saturation; no single region dominates, preserving neutral white-balance.
• Hard-Oxide Ion-Assisted Coating Stability - Gentle notch profile remains stable across 5000+ operational hours and thermal cycling; no wavelength creep or notch broadening in continuous-duty broadcast and architectural applications.
• Universal Optical Format Availability - Round 5-450 mm, square, and custom free-form blanks available on Borofloat, soda-lime, Schott D263 T, Corning Eagle XG with 0.21-3.8 mm thickness for seamless fixture integration.

Typical Applications

• General Interior Architecture - Office buildings, schools, and commercial spaces achieve warm-neutral CRI without sacrificing illumination levels; occupants report improved comfort and productivity with subtle color enhancement.
• Residential Ambient Lighting - Home fixtures using CRI-11 create naturally warm interiors with minimal lumen sacrifice; residents perceive ambiance improvement without visible color shift or dimming sensation.
• Hospitality Corridor & Common-Area Lighting - Hotels and resorts illuminate lobbies, hallways, and meeting spaces with full brightness and warm tone; guests unconsciously perceive premium environment from subtle color enhancement.
• Retail General Merchandise Display - Department stores and supermarkets benefit from balanced CRI improvement without lumen reduction; customers remain comfortable during extended shopping sessions without visual fatigue.
• Outdoor Architectural Feature Lighting - Building facades and landscape lighting achieve warm CRI while maintaining visibility and safety; nighttime appearance remains crisp and detailed despite color enhancement.

CRI-11 samples ready in 2-3 weeks; production runs from 25 units onward support custom configurations, coatings, and large-area custom blanks. Volume pricing available for architectural lighting integrators.