| 摘要 |
Disclosed herein is a concentrating photovoltaic system utilizing a lens/reflector array to spatially divide the incident sunlight into separate incoherent beams, and a principle optical element to superpose the separate beams that undergo near-field diffraction/transmission, and form a uniform illumination pattern on the photovoltaic (PV) cell with similar shape and size. The array and principle optical element can be flexibly disposed in the system as long as the near-field diffraction condition is satisfied. The PV cell is disposed close to the focus of the principle optical element, and the concentrated illumination pattern on the PV cell is nearly a geometric projection of individual lens/reflector in the array. The size of the pattern is controlled by changing the focal lengths of the array and principle optical element, the distance between them, and the size of individual lens/reflector in the array. The system is insensitive to component misalignment and has the advantage of achieving high concentration ratio and efficient energy conversion with relatively low cost and compact design.
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