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The orthogonal surface equation of the collimating micro-lenses array is derived, the divergence angles after collimating and the parameters of the focused lens are calculated.
推导出了正交的两组准直微透镜阵列的面形公式；计算了准直光束的准直精度和聚焦光学系统参数。
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The team started with a commercially available "micro-lens array" - a grid of tiny lenses just 50 millionths of a metre across.
BBC: 'Cloaking' idea traps a rainbow
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