Double-pass notch filter passing vivid violet (395 – 450 nm) and deep red (630 – 715 nm) while driving green-cyan light below 1 % for a clean magenta spectrum.
M12613 opens two bright windows—one in the near-UV/violet band
(≈ 395 – 450 nm) and one in the deep red (≈ 630 – 715 nm)—while forcing the
green-cyan region down to detector noise. Transmission stays above 90 % in violet,
drops below 1 % from ~475 nm to 605 nm, then rockets past 90 % again near 630 nm
and rides 92 – 94 % out to ~715 nm before tapering to control stray NIR.
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.
M12613 transmits two clear windows—one in the near-UV/violet and one in the deep red—while pushing the entire green-cyan band down to detector noise. Transmission stays above 90 % from roughly 395 nm to 450 nm, collapses to < 1 % through about 475 nm – 605 nm, then rockets past 90 % again near 630 nm and holds 92 – 94 % out to ~715 nm before tapering toward the near-IR. The spectrum delivers vivid magenta throughput with mid-visible clutter cleanly suppressed.
Key advantages
Deep 475 – 605 nm notch – < 1 % T knocks out green autofluorescence and ambient spill.
High dual passbands – > 90 % T in 395 – 450 nm and 630 – 715 nm keeps violet sources and red detectors bright.
Controlled red roll-off – Gentle decline above ~720 nm limits excess infrared while retaining deep-red signal.
Hard-oxide durability – Ion-assisted coating resists heat, humidity, solvents, and repeated cleaning.
Made-to-fit 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
Fluorescence microscopy & cytometry – Pass violet excitation and red emission while silencing green background for crisper images.
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 – Pair 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 fast or volume lots next quarter? M12613 filters can be coated, diced, and shipped to your exact specifications—quickly.