Re: [ATM] Foucault images

[Dale Eason <atmpob@yahoo.com>]

What I think is the diffraction from the dirt will be
aligned with the knife.  Somehow there is evenly
spaced obstructions in your setup that could be
creating the lines.  I don't know enough about it but
could it be the spacing of the CCD showing up?  Maybe
there is a fine pattern etched into the coating of the
CCD cover plate.

I think these tend to vanish as the slit is made
wider.  You could try that to see if they diminish.
Then you would know if they are related to diffration.


Dale Eason

--- Mike Lockwood <melockwo@uiuc.edu> wrote:

> Dale,
> 
> Dale Eason wrote:
> > I get isolated streeks like that correspond to
> dirt on the CCD
> > window of my camera.
> 
> OK, as per your suggestion and Stan Truitt's I will
> try tilting the
> camera and see what happens.
> 


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