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Re: [Phys-l] pinhole camera

At 04:32 PM 4/15/2007, you wrote:
Here is an application in which a pinhole camera can be used today. (I
do not remember where I read about this, years ago.) Suppose you want
to know about distribution of X rays at the surface from which they are
emitted. A lead sheet with a pinhole, plus an X-ray film, is a
solution. The film will produce "the image" of the source. Yes, a lens
focusing X-rays, if it existed, would be desirable.
_______________________________________________________
Ludwik Kowalski


Focusing mirrors for imaging X-ray sources are made by exploiting
reflection at glancing incidence. They look like capillaries, or coaxial rings.



Brian Whatcott Altus OK Eureka!