Mercury Vapor Lamp Uv Spectrum

The blue green tint of mercury vapor lamps is caused by the strong violet and green lines.

Mercury vapor lamp uv spectrum.

Lamp output in the uv range depends on the amount of mercury and vapor pressure of mercury in the lamp. The dominant emission 90 from these lamps is uv c energy. As they strike mercury atoms a mercury electron is liberated at a frequency representative of mercury s spectral line which is 253 7nm. Uv spectrum in medium pressure mercury lamps a plasma that emits uv light is generated by applying electrical voltage.

Lightsources and strategic partner lighttech manufacture a low pressure mercury lamp lp hg lamp that provides highly efficient short wavelength ultraviolet energy. When the mixture is energized excited it creates a glowing plasma of electrons that pass through the mercury vapor. These types of lamps are available in ozone producing and ozone free quartz with a variety of phosphors. Line spectrum of mercury vapor.

Pulsed xenon lamps emit uv light across the entire uv spectrum with a peak emission near 230 nm. Mercury based lamps operating at low vapor pressure emit uv light at the 253 7 nm line. These lamps are usually low pressure mercury vapor lamps. It is important to use a lamp that emits uvc also termed far uv deep uv or vacuum ultraviolet vuv.

The distribution of energy over the wavelength ranges is depicted on the left. In low pressure mercury vapor lamps only the lines at 184 nm and 254 nm are present. The usual means of generating uv c for disinfection is most typically with a mercury vapor lamp that produces light through use of an electric arc through vaporized mercury. High pressure mercury lamps installed at most fluorescence microscopes are not suitable because they do not emit the short wavelengths needed for this lithography.

As the arc temperature rises mercury in the lamp converts to a gaseous vapor state. Mercury vapor conducts electricity completing the circuit. Low pressure mercury vapor lamps are a highly efficient source of uv light particularly short wavelength uv light 254nm and 185nm. Often called germicidal or ozone absorption lamps they are very stable light sources.

Our lp hg lamp converts forty percent of the electrical power into uvc radiation for germicidal applications. Ultraviolet light emitting diode uv c led lamps emit uv light at selectable wavelengths between 255 and 280 nm. Current is limited from the power source to protect the lamp and supply wiring.