Design and performance analysis of high efficiency non-imaging concentrated optical system

Aiming at the low optical efficiency of Fresnel lens, a high-efficiency non-imaging concentrated optical (NICO) system composed of an aspheric lens and a trumpet lens was designed. The aspheric lens was optimized in sequential mode of Zemax, and the geometric radius of its image spot was reduced from 42 mm to 1.7 mm by minimizing the spherical aberration. The aspheric lens and trumpet lens were modeled and optimized in non-sequential mode of Zemax, and the NICO system with 87% optical efficiency and 0.9° received angle was achieved by Monte Carlo ray tracing analysis. Finally, the packaging and testing of the high concentrated photovoltaic (HCPV) module were completed based on samples of an aspheric lens array and 48 trumpet lenses. The test results showed that the photoelectric conversion efficiency of the module reached 30.03%, which was significantly improved compared with the HCPV module composed of the Fresnel lens.