BH-A14 Blue Reflection Mirror

BH-A14 is a 45 ° incidence blue-reflection dichroic mirror engineered for three-panel LCD, DLP®, LCoS and laser-phosphor engines. Its coating blocks the entire blue band (< 460 nm) while delivering > 95 % transmission from roughly 470 nm to 680 nm, so green-and-red primaries speed straight through the prism with minimal color shift. Beyond ≈ 700 nm the coating attenuates NIR spill that can over-heat light engines or degrade contrast, yet still offers a controlled window (~ 94 % T) around 760 nm when a second-order IR path is required.

Key advantages

• > 95 % transmission 470 – 680 nm – sends green and red channels through the combiner with virtually no loss.

• < 1 % leakage below 450 nm – reflects the blue pump or LED band cleanly into its optical arm.

• Steep 10 nm transition edge – minimises overlap with the blue-pass mirror for wide-gamut projectors.

• Low-absorption oxide stack – handles > 10 W cm⁻² CW RGB-laser loads without colour drift.

• Versatile glass choices – Borofloat®, Eagle XG or ultra-thin D263 T (up to 450 °C duty) and economical soda-lime (≤ 150 °C), cut from 5 mm to 450 mm and 0.21 – 3.8 mm thick.

Typical applications

• RGB projection prisms – reflect blue into the B-panel and transmit GR for bright, colour-accurate imagery.

• Laser-phosphor light engines – separate blue pump light from green/red phosphor output without extra plates.

• Head-up & AR combiners – inject colour imagery while keeping daylight reflections out of the driver’s eye-box.

• Machine-vision illumination – create pure blue lines while passing red/NIR inspection light to the camera.

• Multispectral cameras – isolate the visible GR band while rejecting UV/blue excitation or NIR flare.

Need samples tomorrow or thousands next quarter? BH-A14 mirrors are coated, diced and shipped to your exact spec—fast.