M5601 Broadband Notch Filter
Double-pass / single-notch filter passing bright violet (390 – 445 nm) and red (620 – 740 nm) while dumping green-cyan glare below 1 %.
- Violet passband: 390 – 445 nm, > 90 % T
- Deep notch: < 1 % T 460 – 585 nm
(< 0.3 % T valley floor) - Red passband: 620 – 740 nm, 92 – 95 % T
- Edge steepness: ~15 nm 90 → 10 % on each side
- 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
M5601 passes two bright windows—one in the near-UV/violet band and another
in the orange-to-deep-red band—while driving the entire green region down
to detector-noise levels. Transmission exceeds 90 % from ~390 nm to
445 nm, plunges below 1 % across 460 – 585 nm, then climbs past 90 % by
~620 nm and stays 92 – 95 % to 740 nm before a gentle roll-off. The
ion-assisted hard-oxide stack shrugs 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 flaw + red contour machine-vision, Raman/multispectral
sensors, and AR/HUD optics that need violet tracking plus red graphics
without mid-band light.
Description
M5601 passes two bright windows—one in the near-UV / violet band and another in the orange-to-deep-red band—while it drives the entire green region down to detector-noise levels. Transmission is above 90 % from roughly 390 nm to 445 nm, then plummets to below 1 % through about 460 nm – 585 nm. It climbs past 90 % again by ~620 nm and stays between 92 % and 95 % out to 740 nm before a gentle roll-off. The result is a clean “double-pass / single-notch” spectrum that removes the green-cyan band yet leaves violet excitation and red emission—or magenta lighting—intact.
Key advantages
-
Deep 500 nm-class notch – < 1 % T across ~460 nm – 585 nm dumps green glare and autofluorescence.
-
High dual passbands – > 90 % T in 390 nm – 445 nm and 620 nm – 740 nm keeps violet excitation and red detection bright.
-
Broadband blocking floor – < 0.3 % T through the valley shields sensors from stray light and boosts signal-to-noise.
-
Hard-oxide durability – Ion-assisted coating endures heat, humidity, solvents, and repeated cleaning cycles.
-
Made-to-fit 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
-
Fluorescence imaging – Pass violet excitation and red emission while suppressing green autofluorescence for cleaner contrast.
-
Raman & multispectral sensors – Eliminate the laser’s green background yet keep Stokes/anti-Stokes bands.
-
Stage & architectural lighting – Create saturated magenta washes (violet + red) without green spill.
-
Machine vision – Combine UV flaw detection with red contour lighting, blocking mid-band reflections.
-
AR / HUD optics – Inject violet tracking beams and red graphics while keeping central visible light out of the user’s eye path.
Need prototypes quickly or volume production later? M5601 filters can be coated, diced, and shipped to your exact specification—fast.
