Mercury Vapor Lamp Uv Spectrum

Ultraviolet light emitting diode uv c led lamps emit uv light at selectable wavelengths between 255 and 280 nm.

Mercury vapor lamp uv spectrum.

Our lp hg lamp converts forty percent of the electrical power into uvc radiation for germicidal applications. Low pressure mercury vapor lamps are a highly efficient source of uv light particularly short wavelength uv light 254nm and 185nm. Fused silica is used in the manufacturing to keep the 184 nm light from being absorbed. Lightsources and strategic partner lighttech manufacture a low pressure mercury lamp lp hg lamp that provides highly efficient short wavelength ultraviolet energy.

The distribution of energy over the wavelength ranges is depicted on the left. These lamps are usually low pressure mercury vapor lamps. Mercury vapor conducts electricity completing the circuit. As they strike mercury atoms a mercury electron is liberated at a frequency representative of mercury s spectral line which is 253 7nm.

Line spectrum of mercury vapor. The dominant emission 90 from these lamps is uv c energy. High pressure mercury lamps installed at most fluorescence microscopes are not suitable because they do not emit the short wavelengths needed for this lithography. When the mixture is energized excited it creates a glowing plasma of electrons that pass through the mercury vapor.

Pulsed xenon lamps emit uv light across the entire uv spectrum with a peak emission near 230 nm. The blue green tint of mercury vapor lamps is caused by the strong violet and green lines. Mercury based lamps operating at low vapor pressure emit uv light at the 253 7 nm line. Current is limited from the power source to protect the lamp and supply wiring.

It is important to use a lamp that emits uvc also termed far uv deep uv or vacuum ultraviolet vuv. Lamp output in the uv range depends on the amount of mercury and vapor pressure of mercury in the lamp. 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. Often called germicidal or ozone absorption lamps they are very stable light sources.

125w reptile heat lamp bulb mixjoy high intensity self ballasted mercury vapor light bulb uva uvb full spectrum sun light for reptile and amphibian use 4 2 out of 5 stars 31 21 99 21. Uv spectrum in medium pressure mercury lamps a plasma that emits uv light is generated by applying electrical voltage. In low pressure mercury vapor lamps only the lines at 184 nm and 254 nm are present.