M79303 Broadband Notch Filter
Double-pass notch filter passing vivid violet (390 – 450 nm) and deep red (630 – 770 nm) while dumping green-cyan light below 1 % for a pure magenta profile.
- Violet passband: 390 – 450 nm, > 90 % T
- Deep notch: < 1 % T 470 – 590 nm
(valley ≈ 0.2 % T) - Red passband: 630 – 770 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
Learn more
M79303 opens two clear windows—one in the near-UV/violet (≈ 390 – 450 nm)
and one in the deep red (≈ 630 – 770 nm)—while driving the entire
green-cyan band down to instrument noise. Transmission tops 88 – 92 % from
~395 nm to 440 nm, collapses below one percent through roughly
465 nm – 600 nm, then rockets past 90 % again near 625 nm and holds
> 92 % out past 750 nm. Ion-assisted hard-oxide layers shrug 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 + red machine-vision illumination, green-band suppression in
multispectral/Raman sensors, and AR/HUD optics that need violet tracking
plus red graphics with the mid-visible kept dark.
Description
The M79303 combines precise spectral isolation with exceptional transmission efficiency across dual passbands. Blocking 456-584 nm with only 0.1 % depth at 507 nm, this filter transmits 89.3 % in the blue region and 92.2 % in the red-NIR band, reaching 95.2 % peak transmission. Its 167 nm notch width balances rejection depth with passband bandwidth, making it suitable for demanding fluorescence and laser-based applications.
Key Advantages
- Controlled Notch Width - 167 nm blocking band optimizes the ratio between deep rejection and usable passband separation
- Ultra-Low Notch Depth - 0.1 % transmission at 507 nm effectively suppresses green fluorescence and laser scatter
- Hard-Oxide Multilayer Coatings - Ion-assisted deposition ensures long-term durability in laboratory and industrial environments
- Flexible Form Factors - Available in round, square, free-form shapes on standard glass substrates from 5-450 mm diameter and 0.21-3.8 mm thickness
- Consistent Peak Transmission - 95.2 % across both passbands minimizes signal loss in multi-detector optical systems
Typical Applications
- Fluorescence Microscopy - Optimized for separating cyan and red fluorophore channels in live-cell imaging
- Two-Photon Excitation - Blocks green Raman and SHG artifacts while passing red emission in intravital imaging
- Laser-Induced Fluorescence - Achieves clean spectral separation in portable and field-deployed LIF instruments
- Multispectral Sensing - Enables efficient dual-channel radiometry and color discrimination in remote sensing systems
- Stage Lighting Control - Creates magenta color effects while blocking green wavelengths in theatrical and broadcast applications
Prototyping completed in 2-3 weeks; volume production delivers consistent coatings and precise substrate dimensions.
FAQ
M79303 FAQ
What is M79303 and what is it used for?
M79303 is a 444/611 nm Notch Filter. The M79303 combines precise spectral isolation with exceptional transmission efficiency across dual passbands. Blocking 456-584 nm with only 0.1 % depth at 507 nm, this filter transmits 89.3 % in the blue region and 92.2 % in the red-NIR band, reaching 95.2 % peak transmission. Common uses include Fluorescence Microscopy, Two-Photon Excitation, Laser-Induced Fluorescence, and Multispectral Sensing.
What are the key optical specs of M79303?
Key published specs for M79303 include Notch centre: 527.1 nm; Notch width (FWHM): 167.0 nm; Notch depth: OD ≥ 3.0 (T < 0.104%); Passband transmittance: ≥ 80.3% T (outside notch region); Edge steepness: ~29 nm (90 → 10 % per edge).
What applications is M79303 best suited for?
M79303 is commonly used for Fluorescence Microscopy, Two-Photon Excitation, Laser-Induced Fluorescence, and Multispectral Sensing. Fluorescence Microscopy - Optimized for separating cyan and red fluorophore channels in live-cell imaging.
Can M79303 be customized for size, substrate, or coating requirements?
KUPO lists the construction for M79303 as Ion-assisted hard-oxide; 5 – 450 mm shapes, 0.21 – 3.8 mm thick. Published custom options include Centre tuning, notch width adjustment, multi-notch designs, rapid prototypes. Flexible Form Factors - Available in round, square, free-form shapes on standard glass substrates from 5-450 mm diameter and 0.21-3.8 mm thickness.
What should I know about angle of incidence and durability for M79303?
The published angle of incidence for M79303 is 0° (normal incidence); custom angles available. The hard-oxide coating is built for repeated handling, heat, and cleaning.
