P79711 Broadband Notch Filter
Double-pass notch filter sending vivid violet (395 – 450 nm) and deep red (640 – 760 nm) straight through while plunging green-cyan light below 1 % for a clean magenta spectrum.
- Violet passband: > 90 % T @ 395 – 450 nm
- Deep notch: < 1 % T @ 475 – 610 nm
valley ≈ 0.2 % T - Red passband: 640 – 760 nm, 92 – 95 % T
- 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
P79711 opens two bright windows—one in the near-UV/violet band
(≈ 395 – 450 nm) and one in the deep red (≈ 640 – 760 nm)—while driving the
green-cyan region down to detector noise. Transmission reaches 90 – 94 % in
violet, drops below 1 % from ~475 nm to 610 nm, then rockets past 90 % again
near 640 nm and rides 92 – 95 % beyond 750 nm. Rugged ion-assisted coatings
shrug off heat, humidity, solvents, and repeated cleaning.
KUPO coats Borofloat®, soda-lime, Schott D263 T, or Corning Eagle XG
substrates cut to any outline—from 5 mm chips to 450 mm plates—in
thicknesses of 0.21 – 3.8 mm, and can ship prototypes in about two weeks.
Typical uses: violet-excite/red-detect fluorescence, magenta stage
lighting, UV + red machine-vision, green-band suppression for Raman /
multispectral sensors, and AR/HUD optics that need violet tracking plus red
graphics without mid-visible clutter.
Description
P79711 sends two bright windows through—one in the near-UV/violet at roughly 395 – 450 nm and another in the deep red around 640 – 760 nm—while it pushes nearly all green-cyan light down to instrument noise. Transmission reaches 90–94 % in the violet band, drops below 1 % from about 475 nm to 610 nm, then surges past 90 % again near 640 nm and holds 92–95 % out beyond 750 nm. The net effect is vivid magenta throughput with the mid-visible region cleanly suppressed.
Key advantages
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Wide 475 – 610 nm notch – < 1 % T removes green autofluorescence and ambient spill.
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High dual passbands – > 90 % T in 395–450 nm and 640–760 nm keeps violet excitation and red detection bright.
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Low blocking floor – Mid-band floor down to ~0.2 % boosts signal-to-noise in sensitive imaging.
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Hard-oxide durability – Ion-assisted coating resists heat, humidity, solvents, and repeated cleaning.
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Custom formats – Round, square, or free-form blanks from 5 mm to 450 mm, thickness 0.21 – 3.8 mm, on Borofloat®, soda-lime, Schott D263 T, or Corning Eagle XG glass.
Typical applications
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Fluorescence microscopy & flow cytometry – Pass violet excitation and red emission while silencing green background for higher contrast.
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Raman & multispectral sensors – Block 532 nm or 561 nm laser lines yet keep violet and red Stokes/anti-Stokes bands.
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Stage & architectural lighting – Create saturated magenta washes (violet + red) with virtually no green contamination.
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Machine-vision systems – Pair UV crack detection with red contour lighting, eliminating 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 next week or production volumes later? P79711 filters can be coated, diced, and shipped to your exact specifications—fast.
