282/8nm UVC Bandpass Filter
282/8nm UVC Bandpass Filter is a UV optical narrow bandpass filter. Coligh manufactures UV bandpass filters with high transmission and deep blocking depth
- Center wavelength 282nm
- FWHM 8nm
- Transmission peak ≥25%
- Blocking depth OD5
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282/8nm Optical UVC Bandpass Filter Description
282/8nm UVC bandpass filter is a high-performance optical filter designed for UV C band 200-280nm applications
- Central wavelength 282+/-2nm, half bandwidth 8+/-2nm, accurately matches UVC sterilization such as 275-285nm and specific fluorescence excitation requirements
- The transmittance in the passband is greater than or equal to 25%, which can ensure the energy utilization of the UV light source
- The cutoff depth outside the passband is OD5 in the range of 200-1200nm, effectively blocking visible light, infrared light and non-target UV bands, reducing background noise interference.
- We use high-purity fused quartz as the substrate and use hard coating technology, which is resistant to high temperature and UV radiation aging, and has no performance degradation after long-term use.
282/8nm UVC Bandpass Filter Technical Datasheet
| Parameter | Specification |
| Center Wavelength | 282 nm ± 2 nm |
| FWHM | 8 nm ± 2 nm |
| Peak Transmission | ≥ 25% |
| Blocking Range | 200–1200 nm |
| Blocking Depth | OD5 |
| Substrate Material | UV Fused Silica |
| Surface Quality | 80-50, 60-40,40-20 (MIL-PRF-13830B) |
| Clear Aperture | ≥ 90% of the filter diameter |
| Filter Dimensions | φ12mm，φ15mm，φ25.4mm or custom |
| Angle of Incidence | 0° +/-5° |
| Coating Type | Hard-coated |
| Durability | MIL-STD-810E compliant， Method507.3 |
| Other similar FWHM availiable | 340/8nm, 405/8nm, 450/8nm, 480/8nm, 492/8nm, 505/8nm, 510/8nm, 546/8nm, 578/8nm, 620/8nm, 630/8nm, 670/8nm, 700/10nm, 750/10nm, 760/10nm |
282/8nm UVC Narrow Bandpass Filter Applications
- UV sterilization equipment
In the UVC band, 275-285nm is the wavelength range with the highest sterilization efficiency, especially the peak damage to DNA/RNA is at 265-280nm. Traditional wide-spectrum UVC light sources will emit non-sterilizing wavelengths of ultraviolet light such as UVA and UVB, and visible light, resulting in energy waste and equipment heating. Through the 282/8nm narrow-band filter, only the 282±4nm UVC with the highest sterilization efficiency is allowed to pass, shielding stray light in other bands. It can improve sterilization efficiency and extend the service life of the equipment - Fluorescence detection
In fluorescence detection, the excitation light source needs to accurately match the excitation wavelength of the fluorescent marker, such as some DNA probes are excited at 280-285nm, but environmental stray light will interfere with the detection signal and reduce the signal-to-noise ratio. Through the 282/8nm UVC Bandpass Filter, only 282nm excitation light is allowed to pass, which can meet the requirements of medical diagnosis or scientific research experiments - Spectral analysis
In Raman spectrometers and UV spectrophotometers, spectral analysis relies on the stability of single wavelength light, but xenon lamps will introduce multi-band interference, causing characteristic peaks to shift or overlap, affecting the accuracy of material component identification. The 282/8nm filter can separate 282nm monochromatic light from a wide-spectrum light source as an analytical reference wavelength to accurately identify the characteristic peaks of the substance.
