Re: [Phys-l] pinhole camera

[John Denker <jsd@av8n.com>]

On 04/16/2007 10:08 AM, Edmiston, Mike wrote:

> It's difficult to imagine Fresnel technology for x-rays that are more clearly what one thinks of
> as traditional x-rays.

I get 13,800 hits from
  http://www.google.com/search?q=zone-plate+hard-x-ray
including
  http://tinyurl.com/yodnc3
which says:

> > Abstract
> >
> > A zone plate for hard X-rays with outermost zone width as small as 30 nm and thickness 
> > ~14 μm fabricated by sputtered-sliced technology was evaluated. With the brilliant X-ray
> > beam from the undulator at the SPring-8 the minimum focal spot size attained was
> > ~0.8 μm at the energy of 18.6 keV. The intrinsic diffraction efficiency was determined to
> > be ~12%.