Fisheye gives new route to perfect images

Published in Physics World, 30 Sep 2009

A fisheye lens proposed over a century ago can produce perfectly focused images without using any exotic “negative refractive index” materials, a physicist in the UK has calculated.

Ulf Leonhardt of St Andrews University claims that a fisheye lens – of the type invented by the great 19th century physicist and mathematician James Clerk Maxwell – can focus beyond the troublesome diffraction limit, which precludes standard lenses from achieving a resolution finer than the wavelength of light. […]

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