BH-A15 Green Reflection Mirror
BH-A15 reflects the full green 505 – 565 nm band with ≈ 98 % efficiency while letting both blue/violet 350 – 470 nm and red/NIR 600 – 750 nm sail through at > 94 %—the perfect complement to BH-A14 for razor-clean RGB splitting.
- G-band reflection: > 98 % R ( < 2 % T ) 505 – 565 nm
- B + R pass: > 94 % T in 350 – 470 nm & 600 – 750 nm
- Edge steepness: < 10 nm 10–90 % transition
- Power rating: > 20 kW h cm-2 CW (IBS oxide)
- Surface quality: λ/4 P-V flatness @ 632 nm
- Glass menu: Borofloat®, Eagle XG, D263 T, soda-lime • 5 – 450 mm • 0.21 – 3.8 mm
Learn more
BH-A15 completes an RGB prism set: it rejects green with
> 98 % reflectance, steering 520-nm laser diodes or lamp light into a dedicated
G-panel while allowing blue and red channels to continue un-attenuated. A
sub-10 nm crossover edge delivers minimal overlap with the companion
blue-reflection or red-reflection mirrors, enabling > 90 % colour-gamut
coverage and tight corner uniformity in 4 K/8 K projection engines.
The dense ion-beam-sputtered oxide stack tolerates > 20 kW h cm-2
of CW RGB-laser flux while maintaining colour over 24/7 duty cycles.
Angle-induced shift remains under ±5 nm for AOIs 40°–50°, easing
alignment tolerances in compact prisms and AR combiners.
Popular uses: 3-LCD & DLP® prisms • laser-phosphor
wheels • RGB dichroic cubes • AR/VR combiners that must reflect
green guide beams • spectral cameras needing a clean G notch.
Description
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
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High-contrast green stop – < 2 % T (≈ 98 % R) across 505 – 565 nm dumps green for separate modulation.
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Bright blue + red pass – > 94 % T through 360 – 470 nm and 600 – 750 nm maximises luminous efficacy.
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Hard IBS oxide stack – survives > 20 kW h/cm² without burn-in or colour shift.
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λ/4 P-V flatness – supports 4 K/8 K projection optics and AR combiners.
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MIL-M-13508C durability – scratch-, humidity- and abrasion-resistant for field use.
Typical applications
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3-LCD / 3-chip DLP® engines – steer green to its own integrator while passing B + R to downstream optics.
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Laser-phosphor projectors – separate 520 nm laser diodes from red-converted phosphor light.
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X-cube prisms & dichroic wheels – combine with blue- and red-reflection mirrors for compact RGB splitting.
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Augmented-reality combiners – reflect green guide beams without dimming the see-through view.
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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.
