HMG-7 is a minus-green (magenta-balance) broadband filter that trims the mid-green while keeping output high in the blue and long-red. Transmission sits ~78–85% from ~400–450 nm, rises to ~88–90% near ~480–505 nm, then dips through green with a controlled notch around ~585–590 nm (~69–72% T). Past the notch it surges to a bright red plateau of ~93–96% from ~630–700 nm, holding ~91–93% out to ~740–760 nm before easing slightly toward ~780 nm.
Key advantages
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Minus-green tuning — targeted attenuation across ~560–600 nm (center ~585 nm) neutralizes LED/fluorescent “plus-green” without an over-magenta shift.
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High red throughput — ~93–96% T from ~630–700 nm preserves skin tone warmth and scene brightness.
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Clean blue response — up to ~88–90% T near ~480–505 nm keeps whites crisp and blues saturated.
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Smooth, low-ripple curve — stable colour move across dimming levels and fixture types.
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Built for production — hard dielectric stack resists abrasion and humidity; optional rear-surface AR and slight wedge suppress ghosts/flare.
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Custom formats — Borofloat®, Eagle XG or D263 T (0.21–3.8 mm) for high-temp to ~450 °C; economical soda-lime for ≤150 °C. Custom sizes 5–450 mm.
Typical applications
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Cinema/TV lighting — lift TLCI/CRI by shaving green while maintaining red channel energy.
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Photography & events — neutralize green spill from mixed LED/fluorescent rigs for natural skin tones.
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Architectural & stage — correct ambient greenish cast while keeping punch and clarity.
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Retail & museum — accurate product and artwork colour with minimal light loss.
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Machine vision — balance channels when green overwhelms red-critical features.
Need test chips tomorrow or thousands next quarter? HMG-7 filters are coated and cut-to-size (including dicing) to your exact spec—fast.
