G13909 Broad Bandpass Filter
Razor-clean green filter (512 – 550 nm, > 90 % T) with < 1 % leakage in UV/blue and red, plus only a mild IR tail beyond 760 nm.
- Green passband: 512 – 550 nm, > 90 % T
- UV/blue block: < 1 % T @ 400 – 490 nm
- Red block: < 1 % T @ 585 – 750 nm
- IR tail: < 15 % T @ 780 nm
- Construction: Ion-assisted hard-oxide; 5 – 450 mm, 0.21 – 3.8 mm thick
- Custom options: AOI tuning, ripple smoothing, rapid prototypes
Learn more
G13909 isolates a sharply defined green band while pushing nearly
every other wavelength to background. Transmission rises above 90 % near 512 nm,
stays over that threshold to ~550 nm, and drops below one percent by ~585 nm.
UV/blue remains near zero up to the green edge, and yellow-to-red energy stays
suppressed right out to the near-IR; only a gentle tail lifts beyond 760 nm but
remains under 15 % at 780 nm.
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: FITC-style fluorescence, green-LED machine vision,
RGB laser/LED projection, multispectral vegetation indexing, saturated stage
beams, and AR waveguides needing bright green injection free of UV/IR heat.
Description
The G13909 represents the gold standard for clean bandpass performance, combining a 50 nm passband with 95 % peak transmission and extraordinary blocking characteristics. Superior both above and below the passband, this filter delivers pristine spectral isolation essential for the most demanding optical systems.
Key Advantages
- Exceptional Peak Transmission – 95 % efficiency at 537 nm with > 93 % average transmission across entire 510-552 nm passband
- Extraordinary Out-of-Band Blocking – Blocks 98.42 % of UV light and 98.8 % of red/NIR light—achieving dual-sided extinction superior to most competing designs
- Hard-Oxide Ion-Assisted Coating – Industry-leading coating durability resists abrasion, chemical exposure, and environmental stress for extended optical performance
- Balanced Spectral Profile – Symmetric passband edges minimize chromatic shift artifacts in imaging systems and maintain color fidelity in display applications
- Maximum Format Flexibility – Supplied as round, square, or custom free-form blanks (5-450 mm) on Borofloat, soda-lime, Schott D263 T, or Corning Eagle XG at your chosen thickness (0.21-3.8 mm)
Typical Applications
- Clinical Fluorescence Microscopy – Deliver uncompromising signal purity for diagnostic imaging where patient outcomes depend on image quality and reliability
- Research-Grade Spectroscopy – Enable publication-quality measurements in peer-reviewed research by eliminating background noise and instrumental artifacts
- Premium Display Calibration – Verify green-channel output in high-end LCD and OLED displays with spectral precision matching human color perception
- Quantum Optics Experiments – Support single-photon counting and photon correlation measurements in quantum computing and fundamental physics research
- High-Fidelity Laser Filtering – Extract pure 532 nm output from commercial laser systems for precision alignment and beam characterization
Choose G13909 when optical performance is non-negotiable; we support rapid prototyping and full-scale production of this flagship filter.
FAQ
G13909 FAQ
What is G13909 and what is it used for?
G13909 is a 537 nm Bandpass Filter. The G13909 represents the gold standard for clean bandpass performance, combining a 50 nm passband with 95 % peak transmission and extraordinary blocking characteristics. Superior both above and below the passband, this filter delivers pristine spectral isolation essential for the most demanding optical systems. Common uses include Clinical Fluorescence Microscopy, Research-Grade Spectroscopy, Premium Display Calibration, and Quantum Optics Experiments.
What are the key optical specs of G13909?
Key published specs for G13909 include Centre wavelength (CWL): 531 nm; Bandwidth (FWHM): 50 nm; Peak transmittance: ≥ 95.0 % T; Passband range: 506 – 556 nm; Edge steepness: ~14.5 nm (10 → 90 % per edge).
What applications is G13909 best suited for?
G13909 is commonly used for Clinical Fluorescence Microscopy, Research-Grade Spectroscopy, Premium Display Calibration, and Quantum Optics Experiments. Clinical Fluorescence Microscopy - Deliver uncompromising signal purity for diagnostic imaging where patient outcomes depend on image quality and reliability.
Can G13909 be customized for size, substrate, or coating requirements?
KUPO lists the construction for G13909 as Ion-assisted hard-oxide; 5 – 450 mm shapes, 0.21 – 3.8 mm thick. Published custom options include CWL shifting, bandwidth tuning, custom blocking ranges, rapid prototypes. Maximum Format Flexibility - Supplied as round, square, or custom free-form blanks (5-450 mm) on Borofloat, soda-lime, Schott D263 T, or Corning Eagle XG at your chosen thickness (0.21-3.8 mm).
What should I know about angle of incidence and durability for G13909?
The published angle of incidence for G13909 is 0° (normal incidence); custom angles available. The hard-oxide coating is built for repeated handling, heat, and cleaning.
