M79502 Broadband Notch Filter

Double-pass notch filter passing vivid violet (390 – 435 nm) and rich red (645 – 745 nm) while plunging green-cyan light below 1 % for magenta-pure output.

Violet passband: 390 – 435 nm, > 90 % T
Deep mid-band notch: < 1 % T 460 – 615 nm
(valley ≈ 0.2 % T)
Red passband: 645 – 745 nm, 92 – 95 % T
Edge steepness: ~15 nm 90 → 10 % transitions
Construction: Ion-assisted hard-oxide; 5 – 450 mm shapes, 0.21 – 3.8 mm thick
Custom options: Ripple smoothing, AOI tuning, rapid prototypes

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M79502 offers two bright windows—near-UV/violet and orange-to-deep-red—while driving the entire green band down to detector-noise levels. Transmission exceeds 90 % from ~390 nm to 435 nm, falls below 1 % across 460 – 615 nm, then rockets past 90 % near 645 nm and holds 92 – 95 % out to ~745 nm before gently rolling off. Ion-assisted hard-oxide coatings shrug off heat, humidity, solvents, and repeated wipe-downs. KUPO coats 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 can ship prototypes in about two weeks.

Typical uses: violet-excite/red-detect fluorescence, magenta stage lighting, UV + red machine-vision illumination, laser-line suppression in Raman sensors, and AR/HUD optics that need violet tracking plus red graphics without mid-band light.

$88,888.00

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Description

M79502 delivers two bright windows—one in the near-UV/violet and one in the orange-to-deep-red—while it plunges the entire green–cyan band to detector-noise levels. Transmission sits above 88 % from roughly 390 nm to 435 nm, then drops to below 1 % across 460 nm – 615 nm. It rockets back past 90 % near 645 nm, remains between 92 % and 95 % through about 745 nm, and tapers toward 780 nm. The result is a clean magenta profile that keeps violet excitation and red emission—or violet/red lighting—intense, yet dumps mid-visible glare.

Key advantages

Deep mid-band notch – < 1 % T across ~460 nm – 615 nm removes green autofluorescence and unwanted ambient light.
High dual passbands – > 90 % T in 390 nm – 435 nm and 645 nm – 745 nm maximises violet excitation and red detection.
Broadband blocking floor – Mid-band floor down to ~0.2 % shields sensors and boosts signal-to-noise.
Hard-oxide durability – Ion-assisted coating resists heat, humidity, solvents, and repeated wipe-downs.
Tailor-made 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 imaging – Pass violet excitation and red emission while silencing green background for clearer contrast.
Multispectral & Raman sensors – Eliminate the laser’s green band yet keep violet and red Stokes/anti-Stokes lines.
Stage & architectural lighting – Produce saturated magenta washes (violet + red) without green spill.
Machine vision – Combine UV crack detection with red contour lighting, blocking mid-band reflections.
AR / HUD optics – Inject violet tracking beams and red graphics while leaving the central visible region dark to the user.