M79303 Broadband Notch Filter
Double-pass notch filter passing vivid violet (390 – 450 nm) and deep red (630 – 770 nm) while dumping green-cyan light below 1 % for a pure magenta profile.
- Violet passband: 390 – 450 nm, > 90 % T
- Deep notch: < 1 % T 470 – 590 nm
(valley ≈ 0.2 % T) - Red passband: 630 – 770 nm, 92 – 95 % T
- Edge steepness: ~15 nm 90 → 10 % transitions
- Construction: Ion-assisted hard-oxide; 5 – 450 mm shapes, 0.21 – 3.8 mm thick
- Custom options: Ripple smoothing, AOI tuning, rapid prototypes
Learn more
M79303 opens two clear windows—one in the near-UV/violet (≈ 390 – 450 nm)
and one in the deep red (≈ 630 – 770 nm)—while driving the entire
green-cyan band down to instrument noise. Transmission tops 88 – 92 % from
~395 nm to 440 nm, collapses below one percent through roughly
465 nm – 600 nm, then rockets past 90 % again near 625 nm and holds
> 92 % out past 750 nm. Ion-assisted hard-oxide layers shrug off heat,
humidity, solvents, and repeated cleaning. KUPO can coat Borofloat®,
soda-lime, Schott D263 T, or Corning Eagle XG substrates in any outline—
from 5 mm chips to 450 mm plates, 0.21 – 3.8 mm thick—and ship prototypes
in about two weeks.
Typical uses: violet-excite/red-detect fluorescence, magenta stage
lighting, UV + red machine-vision illumination, green-band suppression in
multispectral/Raman sensors, and AR/HUD optics that need violet tracking
plus red graphics with the mid-visible kept dark.
Description
M79303 opens two clear windows—one in the near-UV/violet (≈ 390 – 450 nm) and one in the deep-red (≈ 630 – 770 nm)—while driving the entire green-cyan band down to instrument noise. Transmission tops 88 – 92 % from about 395 nm to 440 nm, collapses to < 1 % through roughly 465 nm – 600 nm, then vaults past 90 % again by ~625 nm and stays above 92 % out past 750 nm. The result is a clean magenta profile that keeps violet excitation and red emission (or violet+red lighting) bright, yet dumps mid-visible glare.
Key advantages
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Deep 470–590 nm notch – < 1 % T shields sensors from green autofluorescence and ambient spill.
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High dual passbands – > 90 % T in 390–450 nm and 630–770 nm maximises violet excitation and red detection.
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Broad blocking floor – Mid-band floor down to ~0.2 % boosts signal-to-noise in demanding imaging tasks.
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Hard-oxide durability – Ion-assisted coating withstands heat, humidity, solvents, and repeated cleaning.
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Custom formats – Round, square, or free-form blanks from 5 mm to 450 mm, 0.21 – 3.8 mm thick, on Borofloat®, soda-lime, Schott D263 T, or Corning Eagle XG glass.
Typical applications
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Fluorescence imaging & flow cytometry – Pass violet excitation and red emission while silencing green background for cleaner contrast.
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Multispectral/Raman sensors – Block the laser’s green band yet keep violet and red Stokes/anti-Stokes lines.
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Stage & architectural lighting – Produce saturated magenta washes (violet + red) without green spill.
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Machine-vision systems – Combine UV crack detection with red contour lighting, blocking mid-band reflections.
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AR / HUD optics – Inject violet tracking beams and red graphics while keeping the central visible band dark to the eye.
Need prototypes quickly or volume production later? M79303 filters can be coated, cut, and shipped to your exact specification—fast.
