New "metalens" shifts focus without tilting or moving

Boston MA (SPX) Feb 24, 2021
Polished glass has been at the center of imaging systems for centuries. Their precise curvature enables lenses to focus light and produce sharp images, whether the object in view is a single cell, the page of a book, or a far-off galaxy. Changing focus to see clearly at all these scales typically requires physically moving a lens, by tilting, sliding, or otherwise shifting the lens, usuall Source: NanoDaily.com New "metalens" shifts focus without tilting or moving

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