Beam-steering lens arrays enable solar tracking using millimeter-scale relative translation between a set of lens arrays. This may represent a promising alternative to the mechanical bulk of conventional solar trackers, but until now a thorough exploration of possible configurations has not been carried out. We present an approach for designing beam-steering lens arrays based on multi-objective optimization, quantifying the trade-off between beam divergence and optical efficiency. Using this approach, we screen and optimize a large number of beam-steering lens array configurations, and identify new and promising configurations. We present a design capable of redirecting sunlight into a <2^° divergence half-angle, with 73.4% average yearly efficiency, as well as a simplified design achieving 75.4% efficiency with a <3.5^° divergence half-angle. These designs indicate the potential of beam-steering lens arrays for enabling low-cost solar tracking for stationary solar concentrators.

中文翻译：

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通过光束转向透镜阵列的多目标优化实现高性能的固定太阳跟踪。

光束转向透镜阵列可以使用一组透镜阵列之间的毫米级相对平移来进行太阳跟踪。这可能代表了常规太阳能跟踪器机械体积的有前途的替代方案，但是到目前为止，尚未对可能的配置进行彻底的探索。我们提出了一种基于多目标优化设计光束转向透镜阵列的方法，量化了光束发散和光学效率之间的权衡。使用这种方法，我们可以筛选和优化大量的光束转向透镜阵列配置，并确定新的有前途的配置。我们提出的设计能够将太阳光重定向到<2 ^°发散半角，年平均效率为73.4％，以及简化设计，发散半角<3.5 ^°，效率达到75.4％。这些设计表明了光束控制透镜阵列在为固定式太阳能集中器实现低成本太阳能跟踪方面的潜力。