BH-A01 IR/UV-Cut Hot-Mirror

BH-A01 is an all-dielectric hot-mirror that lets visible light sail through while kicking near-infrared heat back toward the source. Transmission climbs above 90 % by ~420 nm, stays between about 92 – 95 % out to 690 nm, then plunges below 1 % for the bulk of the 745 – 1065 nm region. A secondary window appears beyond 1.15 µm (≈ 71 % T), which can be suppressed with an optional backside absorber if your detector is sensitive that far out.

Key advantages

• Bright, neutral visible passband – > 92 % average transmission from 420–690 nm preserves colour balance and luminance.

• Deep NIR blocking – < 1 % T through most of 745–1065 nm keeps sensors cool and prevents IR bleed.

• Hard, easy-clean surface – oxide stack scores > 10 H on the pencil-hardness scale and shrugs off solvents, humidity, and UV.

• Scalable formats – round or square parts from 5 mm to 450 mm, 0.5–3 mm thick, on Borofloat®, fused silica, or polycarbonate substrates.

Typical applications

• CMOS / CCD sensor covers – cut IR before it hits the Bayer filter for crisp daylight video and stills.

• LCD & DLP projectors – divert lamp heat to extend panel life without adding fan noise.

• Medical illumination – filter surgical headlights or microscopes to protect tissue from IR loading.

• Architectural and stage lighting – keep lenses and gobos cooler in high-power LED or arc-lamp fixtures.

• AR/VR combiners – inject visible imagery while rejecting headset IR tracking beams.

Need a prototype fast or thousands of production parts? BH-A01 hot-mirror blanks can be coated, diced, and shipped to your exact spec on a timeline that keeps your project on track.