Engineering the phase front of light with phase-change material based planar lenses.

Sci Rep · 2015 · PMC4345347 · PMID 25726864

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closest p

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a clear trendno p-value reported

A clear trend of the focus shifting away from the lens can be seen as f nominal increases, accompanied by an elongated depth of focus.

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Quoted from the open-access full text in Europe PMC under the licence the publisher applied. The sentence is reproduced exactly as published; the emphasis is ours.