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This breakthrough in cold mirror coating technology withstands light levels above 200 W per square centimeter and extreme temperatures above 400°C. The HeatBuster cold mirrors feature reflectivity values of up to 98% across the visible spectrum and extremely low reflectivity in the infrared, with transmission of equal to or less than 20% in the 800 to 2,500 nm waveband. The mirrors can be designed to operate over a wide range of angles. They can be applied to both infrared transparent substrates (e.g., glass, fused silica, and sapphire) and opaque materials (e.g., stainless steel and electroformed nickel).

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