V79902 Shortpass Filter
UV/violet short-pass filter passing > 85 % below 420 nm and sharply blocking longer wavelengths for clean, high-contrast fluorescence and inspection.
- Passband: 380 – 450 nm, > 85 % T
- Cutoff (T50): ~450 nm
- Edge steepness: ≤ 12 nm 90 → 10 % transition
- Blocking: < 1 % T from 464 – 800 nm
- Construction: Hard dielectric stack on optical glass
- Custom sizes: 5 – 450 mm; odd shapes on request
Learn more
The V79902 UV/Violet Short-Pass Filter delivers high throughput in the 380 – 450 nm range, making it ideal for fluorescence excitation, UV-enhanced imaging, and forensic inspection. A steep dielectric cutoff rolls transmission to below one percent across the visible and near-infrared spectrum, maximising signal-to-noise for precise measurements. Rugged ion-assisted coatings ensure spectral stability under heat, humidity, and solvents. KUPO can fine-tune cutoff slopes, substrate thickness, or angle-of-incidence response and ship customised parts fast for OEM integration.
Description
V79902 UV/Violet Shortpass Filter
This filter sharply transmits ultraviolet to violet wavelengths (approximately 380 nm to 450 nm) while effectively blocking longer visible and near-infrared ranges. Its high throughput in the UV/violet region—coupled with a steep attenuation beyond ~450 nm—makes it ideal for applications requiring selective short-wavelength transmission.
Key Advantages
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High Transmission Below ~450 nm
Maximizes UV/violet signal intensity for applications such as fluorescence excitation and photodetection. -
Sharp Cut-Off
Provides a steep roll-off beyond ~450 nm, ensuring minimal leakage of longer visible or infrared light. -
Excellent Signal-to-Noise Ratio
By effectively blocking unwanted wavelengths, it reduces background noise for more accurate measurements. -
Durable Construction
Engineered to perform reliably under demanding laboratory and industrial conditions.
Typical Applications
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Fluorescence and UV Imaging
Ideal for exciting fluorophores that absorb in the UV/violet range, enhancing the clarity and contrast of fluorescent signals. -
Forensic Analysis
Reveals UV-reactive security features or substances that fluoresce under short-wavelength light. -
Spectroscopy
Facilitates precise measurements of short-wavelength spectral features by minimizing longer-wavelength interference. -
Quality Control and Inspection
Useful for uncovering surface details or flaws in materials under short-wavelength illumination.
With the V79902 Shortpass Filter from KUPO Optic, you can isolate and harness the UV/violet portion of the spectrum, ensuring clean signals, reduced background noise, and more accurate results in a variety of optical systems.
For customization options, including cutting to any size or shape to meet your specific requirements, please contact us today!
