Metalens - coming to a telescope near you

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Metalens - coming to a telescope near you

Postby steve-fung » Fri Jun 10, 2016 12:24 am

Here's a bit of disruptive technology that will revolutionize optics as we know it. Imagine an ultra-thin planar lens that produces a perfect focus, covering the entire spectrum of visible light from red to blue, with no chromatic aberration. Researchers from Harvard has done this using titanium dioxide nanofins on a glass substrate. The lens is "easy" to make and is highly reproducible using a single-step one-layer lithography technique - no more need for precise polishing of lens. The lens is light weight, has high numerical aperture (inversely related to f-ratio), and is highly efficient - perfect for fast telescopes and camera lenses. The lens is also able to produce a focal spot smaller than the wavelength of light, enabling sub-wavelength resolution imaging. Now imagine a world with no more bulky conventional lenses for cell phones, cameras, and telescopes.

https://www.seas.harvard.edu/news/2015/ ... -thin-lens
https://www.seas.harvard.edu/news/2016/ ... h-of-light
http://science.sciencemag.org/content/352/6290/1190
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Re: Metalens - coming to a telescope near you

Postby rene-gedaly » Sun Jun 19, 2016 10:07 am

That's amazing. You post the most interesting news, Steve.
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