CTO-053 Color Temperature Orange (Warming) Filter

CTO-053 delivers a soft, moderate warm bandpass profile with its 50 % crossover at 597 nm and a modest peak of 89.8 % at 655 nm. The filter holds T > 85 % only in a narrow window from 637-673 nm, producing a focused deep-red peak. NIR falls to 65 % at 800 nm. Blue wavelengths show mixed behaviour with a blue shoulder averaging 54.9 % around 450-495 nm, while violet and green are held lower. The result is a subtle, nuanced warm filter with moderate maximum throughput and limited NIR.

Key Advantages

• Focused deep-red peak at 89.8 % near 655 nm - concentrates output in the most visually impactful warm wavelength without excess brightness.
• Moderate overall throughput - suits applications where subdued warm lighting is preferred over maximum brightness.
• Limited NIR (65 % at 800 nm) - reduces infrared content for lower heat transfer and camera-friendlier spectral output.
• Hard-oxide durability - ion-assisted coating withstands 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 mood lighting - provides soft, subdued warm illumination for intimate scenes and low-key dramatic lighting.
• Film and broadcast soft warmth - adds a gentle warm cast without the brightness of full-throughput CTOs, suitable for background and fill lighting.
• Architectural ambiance lighting - creates gentle warm accents for spaces requiring understated, restrained warmth.
• Photography creative filtration - delivers a subtle, soft warm effect with complex spectral character for artistic portraiture.
• Display colour tuning - provides moderate warm correction with limited NIR for camera and projector applications.

Need prototypes in days or production volumes next quarter? CTO-053 filters can be coated, diced, and shipped to your exact specifications.