The strangest thing is that it is considered to be news.

Diffractive lenses have been known for a long time, though sometimes confused 
with Fresnel lenses. Only down side is flexibility with respect to focussing 
distance, contrast and zoom.

DagT


Den 26. aug. 2012 kl. 15:28 skrev Godfrey DiGiorgi:

> fascinating. maybe in the future all lenses will be pancake lenses.
> will there be enough syrup to go around? ;-)
> 
> G
> 
> On Sat, Aug 25, 2012 at 4:44 PM, Steven Desjardins <[email protected]> wrote:
>> https://www.seas.harvard.edu/news-events/press-releases/flat-lens-offers-perfect-image
>> 
>> What a neat idea.
>> --
>> Steve Desjardins
>> 
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> -- 
> Godfrey
>  godfreydigiorgi.posterous.com
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