[ATM] Me stupid was Re: A foucault puzzle

[Dale Eason]

I just decided to poke my finger into the cored hole
of the mirror.  I hurt my finger!  The core was so
transparent I could not see it.  It looked like a hole
but was not.

I feel dumb.

Dale Eason
--- Dale Eason <atmpob at yahoo.com> wrote:

> This is not the image that came off the camera it
> has
> been compressed.  The original was 1meg BMP with no
> compression and looks the same.
> 
> I also have interferograms and the fringes go right
> through the hole.  They do not do that on the mirror
> on the left.
> 
>
http://doeason.home.comcast.net/igrams/2_6inch_igrams.jpg
> 
> Something very strange is going on.
> 
> Dale
> --- Michael Lindner <mikell at optonline.net> wrote:
> 
> > Dale Eason wrote:
> > >
> >
>
http://doeason.home.comcast.net/foucault_images/2_6inch_foucault.jpg
> > 
> > Just a shot in the dark, but if you took this with
> a
> > web cam, and this 
> > is the image as it came off the camera, I'd look
> for
> > a software bug. The 
> > image on the right has a severe case of
> compression
> > artifacts, as can be 
> > seen by the obvious 8x8 pixel blocks that make it
> > up. I'd guess the JPG 
> > compression software on the camera can't handle
> > something about the 
> > frequency of the waviness in the mirror and
> > completely mis-compressed 
> > it. Of course, I may be way off base, but I'd try
> a
> > different camera. 
> > You should definitely not be getting any return
> > signal from the hole.
> > 
> > -- 
> > Michael Lindner
> > http://www.starastronomy.org ***
> > http://home.att.net/~mikel
> > http://www.atmsite.org *** http://www.atmlist.net
> > 
> 
> 
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