The solar radiation test chamber simulates the natural solar spectrum to achieve accurate evaluation of material weather resistance, photochemical effects, and photothermal effects. Its core technology focuses on two dimensions: spectral simulation and environmental control.
Principles of Spectral Simulation
The test chamber uses xenon lamp or metal halide lamp as the core light source, and generates a continuous spectrum covering 280nm to 3000nm through high-pressure gas discharge, fully covering the ultraviolet (UV-A/B/C), visible light, and infrared (IR) bands. Among them, the spectral energy distribution of xenon lamps is highly similar to that of sunlight, especially with a matching degree of over 90% in the ultraviolet and visible light regions. By dynamically adjusting the output of the light source through a filter system, the energy ratio of each band can be accurately controlled. For example, in material photoaging testing, strengthening the ultraviolet band (280-400nm) can accelerate reactions such as coating fading and plastic brittleness; In thermal expansion testing, emphasis is placed on the infrared band (780-2500nm) to simulate temperature rise effects. Some devices are equipped with light intensity sensors to calibrate the irradiation intensity in real time to 1120W/m ² standard solar constant, compensating for light attenuation caused by lamp aging.
Environmental Control Technology
The integrated temperature and humidity control system in the test chamber can maintain a temperature range of -40 ℃ to 150 ℃ and a humidity range of 5% -95% RH during the irradiation process, simulating climate conditions such as desert and humid heat. For example, in automotive component testing, by adjusting the angle of the light source and the position of the sample holder, it is possible to reproduce the solar incidence angle at different geographical latitudes or seasons, and verify the performance changes of the material under specific lighting angles. In addition, infrared radiation penetrates the surface of materials, causing molecular vibrations and heat accumulation, accurately simulating the temperature rise effect caused by long-term outdoor sunlight, providing key data support for the thermal stability evaluation of photovoltaic materials, building coatings and other products.