CTO-042 Color Temperature Orange (Warming) Filter

CTO-042 provides a moderate warm shift biased toward the red, with its 50 % crossover at 584 nm. Blue wavelengths are suppressed to an average of 14.1 %, while the red band delivers a strong 91.3 % average and the NIR band reaches 91.8 %, peaking at 94.7 % at 654 nm. Green and yellow are moderately attenuated at 37.5 % and 48 % respectively. The profile features a well-defined transition into the warm bands with high efficiency across both red and NIR.

Key Advantages

• 50 % crossover at 584 nm with peak of 94.7 % at 654 nm - delivers strong red-channel output with good overall warm-band efficiency.
• Balanced red and NIR (both > 91 %) - provides even performance across the warm visible and near-infrared bands.
• Effective blue suppression (avg 14.1 %) - produces a clean warm output with minimal residual cool-tone content.
• Hard-oxide durability - ion-assisted coating survives high lamp heat, humidity, solvents, and cleaning.
• Custom formats available - round, square, or free-form blanks from 5 mm to 450 mm, thickness 0.21-3.8 mm, on Borofloat®, soda-lime, Schott D263 T, or Corning Eagle XG substrates.

Typical Applications

• Stage and event lighting - delivers a warm wash with strong red emphasis for dramatic and romantic scene design.
• Film and broadcast colour correction - shifts daylight fixtures toward tungsten with a red-biased profile that enhances skin tones.
• Architectural accent lighting - converts neutral LED sources into warm accents with a rich, red-tinged character for interior design.
• Machine vision with red-NIR emphasis - provides matched red and NIR throughput for dual-wavelength inspection and material classification.
• Horticultural spectrum shaping - emphasises red and far-red PAR wavelengths for plant-growth lighting applications.

Need prototypes in days or production volumes next quarter? CTO-042 filters can be coated, diced, and shipped to your exact specifications.