Solar concentrator with a toroidal relay module

Jhe Syuan Lin, Chao Wen Liang

Research output: Contribution to journalArticlepeer-review

2 Scopus citations


III-V multijunction solar cells require solar concentrators with a high concentration ratio to reduce per watt cost and to increase solar energy transforming efficiency. This paper discusses a novel solar concentrator design that features a high concentration ratio, high transfer efficiency, thin profile design, and a high solar acceptance angle. The optical design of the concentrator utilizes a toroidal relay module, which includes both the off-axis relay lens and field lens design in a single concentric toroidal lens shape. The optical design concept of the concentrator is discussed and the simulation results are shown. The given exemplary design has an aspect ratio of 0.24, a high averaged optical concentration ratio 1230×, a maximum efficiency of 76.8%, and the solar acceptance angle of ±0.9°.

Original languageEnglish
Pages (from-to)E153-E158
JournalApplied Optics
Issue number28
StatePublished - Oct 2015


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