P79909 Broadband Notch Filter
Extra-wide yellow band rejection spanning green to deep yellow for comprehensive spectral isolation.
- Notch centre: 573.7 nm
- Notch width (FWHM): 228.9 nm
- Notch depth: OD ≥ 3.1 (T < 0.082%)
- Passband transmittance: ≥ 88.9% T (outside notch region)
- Edge steepness: ~24 nm (90 → 10 % per edge)
- Passband recovery: Within 12 nm of notch edges
- AOI: 0° (normal incidence); custom angles available
- Construction: Ion-assisted hard-oxide; 5 – 450 mm shapes, 0.21 – 3.8 mm thick
- Custom options: Centre tuning, notch width adjustment, multi-notch designs, rapid prototypes
Learn more
P79909 Hybrid delivers Notch centre 573.7 nm, Notch width (FWHM) 228.9 nm, and Notch depth OD ≥ 3.1 (T < 0.082%).
The hard-oxide coating is built for repeated handling, heat, and cleaning.
Best suited for:
Astronomy imaging, long-pass filter applications, broad-spectrum interference suppression, and instruments needing extended yellow-region elimination.
Description
The P79909 features the widest notch specification across the product line at 229 nm, blocking 478-669 nm while achieving only 0.08 % depth at 552 nm. This extraordinary bandwidth suppresses nearly the entire visible green-yellow-red spectrum, yielding a pure magenta optical passband with 91.5 % blue transmission and 92.8 % NIR transmission. Peak transmission of 95.3 % combined with extreme rejection makes this filter ideal for applications requiring maximum spectral separation and minimal mid-visible contamination.
Key Advantages
- Widest Notch Specification - 229 nm blocking bandwidth creates maximum separation between violet-blue and far-infrared passbands
- Exceptional Rejection Depth - 0.08 % transmission at 552 nm virtually eliminates green photon transmission for maximum discrimination
- Hard-Oxide Ion-Assisted Coatings - Premium multilayer construction ensures maximum durability and environmental stability
- Custom Substrate and Format Options - Available in round, square, and free-form geometries on standard glass types from 5-450 mm diameter
- Extreme Spectral Purity - Creates pure magenta optical channels with virtually zero green contamination across entire visible spectrum
Typical Applications
- Extreme Fluorescence Separation - Enables violet-excited and NIR-excited fluorophore detection with unprecedented cross-talk elimination
- Raman Spectroscopy - Blocks Rayleigh scatter across entire visible range while capturing anti-Stokes signals in NIR
- Laser Blocking - Provides complete suppression of green, yellow, orange, and red laser scatter in broadband systems
- Multispectral Imaging - Creates distinct magenta-dominant channel in advanced computational imaging systems
- AR/VR Display Optics - Enables pure magenta color reproduction in spatial computing applications
Specialized prototyping available in 3-4 weeks for the widest notch specification; production accommodates unique applications.
FAQ
P79909 FAQ
What is P79909 and what is it used for?
P79909 is a 459/688 nm Notch Filter. The P79909 features the widest notch specification across the product line at 229 nm, blocking 478-669 nm while achieving only 0.08 % depth at 552 nm. This extraordinary bandwidth suppresses nearly the entire visible green-yellow-red spectrum, yielding a pure magenta optical passband with 91.5 % blue transmission and 92.8 % NIR transmission. Common uses include Extreme Fluorescence Separation, Raman Spectroscopy, Laser Blocking, and Multispectral Imaging.
What are the key optical specs of P79909?
Key published specs for P79909 include Notch centre: 573.7 nm; Notch width (FWHM): 228.9 nm; Notch depth: OD ≥ 3.1 (T < 0.082%); Passband transmittance: ≥ 88.9% T (outside notch region); Edge steepness: ~24 nm (90 → 10 % per edge).
What applications is P79909 best suited for?
P79909 is commonly used for Extreme Fluorescence Separation, Raman Spectroscopy, Laser Blocking, and Multispectral Imaging. Extreme Fluorescence Separation - Enables violet-excited and NIR-excited fluorophore detection with unprecedented cross-talk elimination.
Can P79909 be customized for size, substrate, or coating requirements?
KUPO lists the construction for P79909 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. Custom Substrate and Format Options - Available in round, square, and free-form geometries on standard glass types from 5-450 mm diameter.
What should I know about angle of incidence and durability for P79909?
The published angle of incidence for P79909 is 0° (normal incidence); custom angles available. The hard-oxide coating is built for repeated handling, heat, and cleaning.
