New ultrathin flat lens for the perfect image

August 26th, 2012 - 5:48 pm ICT by IANS  

Washington, Aug 26 (IANS) Applied physicists have created an ultrathin flat lens that reproduces perfect images without the distortions caused by existing lenses.

“Our flat lens opens up a new type of technology. We’re presenting a new way of making lenses. It’s extremely exciting,” says principal investigator Federico Capasso, professor of applied physics at the Harvard School of Engineering and Applied Sciences (SEAS).

Capasso and collaborators created the flat lens, a mere 60 nanometres thick, (nanometre is a billionth part of a metre) by plating a very thin wafer of silicon with a nanometre-thin layer of gold, the journal Nano Letters reports.

The flat lens eliminates optical aberrations such as the fish-eye effect that results from conventional wide-angle lenses, according to a SEAS statement.

The resulting image or signal is completely accurate and does not require any complex corrective techniques, the researchers said.

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