Re: [ATM] Focault Problem

[Guy Brandenburg <gfbrandenburg@yahoo.com>]

Those lines are normal, in my opinion. One should just
ignore them, as they are a result of diffraction. Just
concentrate on the shadows.
Guy Brandenburg

--- Ken Lowther <hermit@outofoptions.org> wrote:
> I see diffraction lines in a slitless tester. ;-) 
> Not bad and NOT when I am
> doing the actual shawdow testing.  Inside and
> outside the test range when the
> blade can be seen as a sharp edge on the full
> brightess mirror.  It never
> ocurred to me that others didn't get them, till
> now...
> 
> Ken
> 
> Quoting Jeff Anderson-Lee <jonah@eecs.berkeley.edu>:
> 
> > What about making the slit wider?  Shouldn't that
> reduce the diffraction?
> >
> > Jeff
> >
> > Ken Lowther wrote:
> >
> >> Quoting Bob May <bobmay@nethere.com>:
> >>
> >>> I often see a set of diffraction lines when I
> put my eye to the KE but,
> >>> oddly enough, have never seen them when using a
> camera.  I don't know why,
> >>> it just is with me.
> >>
> >>
> >> No.  I see them too, but now when I get to the
> point where I can see the
> >> shadows.
> >>
> >> Hermit, holed up in Youngstown, Ohio
> >> _______________________________________________
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> >
> >
> > _______________________________________________
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> 
> 
> 
> Hermit, holed up in Youngstown, Ohio
> _______________________________________________
> ATM mailing list http://www.atmlist.net/


=====
Guy  BrandenburgWashington, DChttp://home.earthlink.net/~gfbranden/GFB_Home_Page.html

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