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Broadband and narrowband irradiance setpoints in weathering test

2022-12-23

In the xenon lamp and UV accelerated aging test, if the irradiance setting value does not match the specific wavelength or wavelength range, the information is not complete. xenon lamp aging tester and UV accelerated aging test chamber are the experimental equipment for xenon lamp and ultraviolet aging test. They are independently developed and produced by our company Shanghai QINSUN Precision Electromechanical Technology Co., Ltd., with high cost performance and complete after-sales service. Welcome customers who need to inquire. In addition, our R&D engineer said there are two ways to set the irradiance.

The broadband irradiance setting (usually TUV or total UV) is the irradiance integral of wavelength over the entire band range , such as 300-400nm (accelerated lab) or 295-385nm (outdoor). Therefore, broadband irradiance values ​​are usually much larger than narrowband irradianceing values. Broadband radiation uses

Lab

Watts per square meter, which can be written as W/m2 or W *m -2.

The narrow band irradiance settings include 340nm and 420nm, which represent a 1nm band range, based on a single wavelength value (e.g. 1/2nm around 340nm). Narrowband irradiation uses watts per square meter per nanometer. Generally written as W/(m2*nm), W/m2/nm or W*m-2*nm-1.

The figure below is a spectral power distribution diagram, referred to as SPD, which is a function of irradiance to wavelength. This SPD shows that for a specific light source the irradiance can be represented by the narrow band 0.35W/m2/nm@340nm or the wide band 40W/m2 from 300-400nm (TUV).

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