A Multisource Regular Dodecahedron Solar Simulator Structure for Uniform Flux

作者：Yang, Chen^*; Wang, Jihong^*; Guo, Xiang^*; Wang, Yi^*; Ding, Zhao^*

来源：IEEE Journal of Photovoltaics, 2016, 6(2): 516-521.

DOI：10.1109/JPHOTOV.2015.2504784

• Cubic cosine relationship
• regular dodecahedron structure
• uniformity

In this paper, a regular dodecahedron solar simulator structure with five spot light sources is presented to provide uniform flux. To analyze light distribution without a dodecahedron cavity, a cubic cosine relationship between deflection angle and test flat plane is proposed, and results show that nonuniformity reaches 5%. By introducing a regular dodecahedron cavity, nonuniformity can be reduced to 2% in a circular area with an 85% in radius, according to the Monte Carlo ray tracing method. Based on the structure, a prototype simulator is fabricated by pentagons with 4 cm inradius and with five high-power light-emitting diodes (LEDs). Across the inscribed circular aperture of the bottom light output pentagon, nonuniformity is 3.1%; while 2% nonuniformity is reached in a 3.4-cm(2) circular aperture whose area occupies 72% of the inscribed circle.

• 出版日期2016-3
• 单位贵州大学