BH-A15 Green Reflection Mirror

BH-A15 is the complement to our blue-reflection BH-A14: it reflects the entire green band (≈ 505 – 565 nm) while passing blue/violet (≈ 350 – 470 nm) and red/NIR (≈ 600 – 750 nm) with > 94 % average throughput. The steep < 10 nm edges that define the notch keep RGB colour channels sharply isolated, and the broadband pass regions preserve brightness in high-lumen laser-phosphor and UHP-lamp engines. We deposit the coating on optical glass that we custom-dice from 5 mm to 450 mm (0.21 – 3.8 mm thick) in Borofloat®, Corning Eagle XG, ultra-thin D263 T, or soda-lime for lower-temperature systems.

Key advantages

• High-contrast green stop – < 2 % T (≈ 98 % R) across 505 – 565 nm dumps green for separate modulation.

• Bright blue + red pass – > 94 % T through 360 – 470 nm and 600 – 750 nm maximises luminous efficacy.

• Hard IBS oxide stack – survives > 20 kW h/cm² without burn-in or colour shift.

• λ/4 P-V flatness – supports 4 K/8 K projection optics and AR combiners.

• MIL-M-13508C durability – scratch-, humidity- and abrasion-resistant for field use.

Typical applications

• 3-LCD / 3-chip DLP® engines – steer green to its own integrator while passing B + R to downstream optics.

• Laser-phosphor projectors – separate 520 nm laser diodes from red-converted phosphor light.

• X-cube prisms & dichroic wheels – combine with blue- and red-reflection mirrors for compact RGB splitting.

• Augmented-reality combiners – reflect green guide beams without dimming the see-through view.

• Spectral imaging – reject dominant chlorophyll band while passing reference blue/red channels.

Proto quantities or high-volume lots—BH-A15 mirrors can be coated, diced, and shipped to spec, fast.