CRI-17 Color Rendering Improvement Filter

CRI-17 combines aggressive yellow suppression with exceptional UV preservation. Peak transmission of 95.5 % at 671 nm contrasts with a minimum of 15.5 % at 443 nm, establishing sharp blue cutoff. The yellow band plunges to 22.3 % while green regions show dramatic selectivity: 31.1 % at 510-540 nm versus 21.1 % at 540-580 nm. Remarkably, UV transmission stays high at 90.1 % - unusual in aggressive correction filters - enabling applications requiring both CRI improvement and UV preservation. The NIR pass (92.0 %) and 61.8 % average transmission reflect a filter optimized for maximum visible-region reshaping with minimal collateral loss in extended spectral regions.

Key Advantages

• Deep Yellow Elimination - Yellow band at 22.3 % transmission removes the exact spectral deficiency where most phosphor-converted LEDs fail; CRI scores improve 6-8 points through selective suppression.
• Unusual High UV Preservation - 90.1 % UV passband maintained alongside aggressive visible-region correction; enables applications like fluorescence microscopy and security marking that require both CRI and UV content.
• Selective Green Wavelength Targeting - 510-540 nm at 31.1 % and 540-580 nm at 21.1 % create a green comb that removes yellow-green excess without over-suppressing cooler green accent colors.
• Multi-Layer Ion-Assisted Hard-Oxide Design - Aggressive notch profile with dual UV and NIR passbands remains stable across 4000+ operational hours; proven in broadcast and scientific measurement applications.
• Full-Range Customization Capability - Round 5-450 mm, square, and custom free-form optical blanks on Borofloat, soda-lime, D263 T, Eagle XG with 0.21-3.8 mm substrate thickness options for any optical path.

Typical Applications

• Fluorescence Microscopy & Diagnostics - Scientific imaging systems benefit from high UV preservation (90 %) alongside CRI correction; tissue and cellular samples render with correct autofluorescence response and color accuracy.
• Security & Document Inspection Lighting - Counterfeit-detection systems using CRI-17 preserve UV marker response while achieving neutral visible-spectrum lighting; inspectors identify security features without color-grading interference.
• High-End Broadcast Color-Critical Production - Film and television using CRI-17 achieve laboratory-grade color accuracy with CRI > 95; talent lighting matches archival standards without requiring post-production color correction.
• Fine-Art Conservation Lighting - Museum conservation labs use CRI-17 for color-matched restoration work; UV content enables proper assessment of varnish and restoration materials alongside visible-spectrum color accuracy.
• Retail Jewelry & Gemstone Display - High-value item lighting achieves CRI > 95 while preserving fluorescence response important for diamond and colored-stone assessment; customers perceive authenticity and value.

CRI-17 prototypes available in 3-4 weeks; production runs support custom configurations, specialized coatings for UV preservation, and volume pricing from 75 units for scientific and broadcast integrators.