Double-pass notch filter passing vivid violet (400 – 470 nm) and bright red (600 – 730 nm) while plunging green-cyan light below 1 % for a crisp magenta spectrum.
M32815 transmits two clear windows—one in the near-UV/violet band
(≈ 400 – 470 nm) and one in the visible red (≈ 600 – 730 nm)—while forcing the
green-cyan region down to detector noise. Transmission stays above ~90 % through
violet, plunges below 1 % from ~518 nm to 543 nm, then rockets past 90 % again
near 600 nm and rides 92 – 94 % out to ~730 nm before a gentle roll-off into the
near-IR.
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—with 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 or multispectral
sensors, and AR/HUD optics that need violet tracking plus red graphics without
mid-visible clutter.
M32815 passes two bright windows—one in the near-UV/violet (about 400 nm – 470 nm) and one in the visible red (roughly 600 nm – 730 nm)—while driving the entire green–cyan band to detector noise. Transmission stays above ~90 % through the violet window, crashes below 1 % from approximately 518 nm to 543 nm, then vaults back over 90 % by ~600 nm. It holds a 92 – 94 % plateau out to around 730 nm before tapering toward the near-IR. The result is vivid magenta throughput with mid-visible clutter cleanly suppressed.
Key advantages
Deep 518 – 543 nm notch – < 1 % T removes green autofluorescence and ambient glare.
High dual passbands – > 90 % T in 400 – 470 nm and 600 – 730 nm keeps violet excitation and red detection bright.
Controlled red roll-off – Gradual decline beyond ~730 nm limits stray IR while retaining deep-red signal.
Hard-oxide durability – Ion-assisted coating withstands heat, humidity, solvents, and repeated cleaning.
Custom formats – Round, square, or complex 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
Fluorescence microscopy & flow cytometry – Pass violet excitation and red emission while silencing green background for higher contrast.
Raman & multispectral sensors – Block 532 nm / 561 nm laser lines yet keep violet and red Stokes or anti-Stokes bands.
Stage & architectural lighting – Produce saturated magenta washes (violet + red) with negligible green spill.
Machine-vision systems – Combine UV flaw detection with red contour lighting, eliminating mid-band reflections.
AR / HUD optics – Inject violet tracking beams and red graphics while keeping the central visible band dark to the eye.
Need prototypes in days or production volumes next quarter? M32815 filters can be coated, diced, and shipped to your exact specifications—fast.