Re: photon sieve

I notice that the caption describes a photon seive as containing
"tens of thousands of pinholes." This does not sound like a very
easy device to produce.

Mike Vande Bunt

Richard M. Koolish wrote:

>There may be a new kind of zone plate called the 'photon sieve'. Instead of
>using clear and opaque concentric rings, it uses pinholes of decreasing diameter
>arranged in rings related to the zone plate.
>
>See: http://www-hasylab.desy.de/newsletter/2001-12-01.htm
>
>It was announced in the Nov 8, 2001 issue of the science journal Nature.
>
Received on Wed Feb 6 01:01:26 2002