P79712 Broadband Notch Filter
Double-pass notch filter passing vivid violet (395 – 455 nm) and rich red (640 – 750 nm) while plunging green-cyan light below 1 % for a clean magenta spectrum.
- Violet passband: > 90 % T @ 395 – 455 nm
- Deep notch: < 1 % T @ 475 – 610 nm
valley ≈ 0.2 % T - Red passband: 640 – 750 nm, 92 – 94 % 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
P79712 transmits two bright windows—one in the near-UV/violet band
(≈ 395–455 nm) and one in the deep red (≈ 640–750 nm)—while forcing the
green-cyan region down to detector noise. Transmission exceeds 88–93 % in violet,
drops below 1 % from ~475 nm to 610 nm, then rockets past 90 % again near 640 nm
and rides 92–94 % 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
in any outline—from 5 mm chips to 450 mm plates—at 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 illumination, green-band suppression in Raman/
multispectral sensors, and AR/HUD optics needing violet tracking plus red
graphics with the mid-visible kept dark.
Description
P79712 transmits two clear windows—one in the near-UV/violet and one in the deep red—while forcing the entire green-cyan band almost to zero. Transmission sits above 88–93 % from about 395 nm to 455 nm, then falls below 1 % across roughly 475 nm – 610 nm. It rockets past 90 % again near 640 nm and rides a 92–94 % plateau out beyond 750 nm. The spectrum delivers vivid magenta throughput with the mid-visible region cleanly suppressed.
Key advantages
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Deep 475 – 610 nm notch – < 1 % T removes green autofluorescence and ambient glare.
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High dual passbands – > 90 % T in 395 – 455 nm and 640 – 750 nm keeps violet sources and red detectors bright.
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Low blocking floor – Mid-band floor down to ~0.2 % boosts signal-to-noise in sensitive imaging tasks.
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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 & 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 – Produce saturated magenta washes (violet + red) with negligible green spill.
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Machine-vision systems – Combine UV flaw 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? P79712 filters can be coated, diced, and shipped to your exact specifications—fast.
