254 nm Narrow Band Pass Filter for Spectroscopy

254 nm Narrow Band Pass Filter for SpectroscopyA 254 nm narrow band UV-C interference filter is designed to isolate the mercury emission line at 253.7 nm and the adjacent deep-UV band, thereby achieving high signal-to-noise ratio (SNR) in applications such as spectral radiometry, medical diagnostics, chemical analysis, and lamp or laser line cleanup. Common UV bandpass filters centered near 250 nm typically have a full width at half maximum (FWHM) of approximately 11 nm and effectively suppress out-of-band transmission from X-ray to far-infrared wavelengths, demonstrating their broad applicability.The filter’s center wavelength aligns precisely with the mercury resonance line at 253.652 nm, which is the dominant emission in low-pressure mercury lamps and serves as the foundation for UV-C-based germicidal systems.In the context of ozone monitoring, standard UV photometers utilize the Beer–Lambert law to measure absorption at 254 nm.In summary, a 254 nm narrowband filter offers laser-li…