[Chaos-l] flat lenses

[Allen Davis]

Hmmmmm...an O 3 eyepiece..allennc

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-----Original message-----
From: Alexey Toptygin <alexeyt at freeshell.org>
To: Michael Hrivnak <mhrivnak at hrivnak.org>
Cc: chaos-l <chaos-l at rtpnet.org>
Sent: Mon, Aug 27, 2012 15:43:18 GMT+00:00
Subject: Re: [Chaos-l] flat lenses

On Mon, 27 Aug 2012, Michael Hrivnak wrote:

>  
https://www.seas.harvard.edu/news-events/press-releases/flat-lens-offers-perf 
ect-image

It only works on one wavelength. As the article says:

> The array of nanoantennas, dubbed a metasurface, can be tuned for >  
specific wavelengths of light by simply changing the size, angle, and >  
spacing of the antennas.

Meaning if you want to focus another wavelength, you manufacture a new lens  
with different properties. Works great in telecom, not great for astronomy,  
unless you're building a telescope that only investigates a single  
wavelength like H-a or O-III...

 			Alexey
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