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Setting irradiance value of broadband and narrowband in xenon lamp aging test

2022-12-30

What is the difference between the xenon arc aging test of the broadband and narrowband irradiation settings? The technical R&D engineer of QINSUN Instruments Co., Ltd. said that for xenon lamp aging and ultraviolet accelerated aging tests, if the radiation setting value cannot reflect a specific wavelength or range of wavelengths, this information cannot be fully displayed. There are two ways to adjust the radiation in the xenon lamp aging test chamber.

Narrowband radiation is set at 340nm and 420nm, representing a band range of 1nm, based on a single wavelength value (e.g. approximately 340nm each ?nm). Narrowband irradiance is measured in nanowatts per square meter. Usually written as W/(m2*nm)W/m2/nm, or W*m-2?nm-1.

Broadband irradiance settings (commonly referred to as TUV or totalUV) refer to the integration of radiant wavelengths across the entire band range, such asls 300-400nm (experimental room acceleration) or 295-385nm (outdoor). Therefore, broadband irradiance value is usually much larger than narrowband irradiance value. The broadband radiation can be written as W/m2 or W? Expressed in per square metre. m-2.

The same radiation, ultraviolet rays are more harmful to fabrics! By using a low-voltage mercury arc to excite fluorescents to emit ultraviolet light, the light source can produce a continuous spectrum in a narrow wavelength range, usually with only one peak. Although the simulation effect of the ultraviolet artificial weathering experiment is not good, the acceleration effect is very good.

The xenon aging test in the xenon lamp aging test chamber is considered a better experimental method to simulate climate aging. Xenon arc light source is one of the light sources that are currently well imitated. It has been theoretically concluded that the xenonlamp is superior to other light sources for a long time. The spectral energy distribution in the ultraviolet region and the visible region is

Lab

for the spectral distribution of sunlight.

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