"高效稳态太阳模拟器设计与实验验证：LED光源集光与分布式光学结构相结合"

Solar simulator is a crucial equipment in the research of photovoltaic and material degradation, providing stable and controllable characteristic irradiance spectrum for light immersion and durability testing. This study focuses on the design of a multi-source distributed steady-state solar simulator using high-power, single-crystal narrow-band LED light sources, coupled with hemispherical homogeneous lenses for full aperture light collection. By designing a curved distributed optical structure, the simulator efficiently achieves spectral matching on the target surface and irradiance of one solar constant (100 mW/cm^2). Experimental results demonstrate that the designed solar simulator exhibits irradiance fluctuation of less than 1.15% over 1000 hours, with irradiance non-uniformity of 1.98% in the central 60 mm × 60 mm square region and 4.99% in the 80 mm × 80 mm region. The spectral matching of the light spot meets Grade A standards. The system is compact, highly scalable, and suitable for long-term steady-state measurements.