Re: [ATM] Foucault images

[Dale Eason <atmpob@yahoo.com>]

I'm not sure about my simulation software yet.  But it
looks like I am closer to the image now.

133lpi  .05 offset from COC.
http://www.atmlist.net/contrib/atmpob-at-yahoo-dot-com/25waves.jpg

For this one astig is 25 waves on the wavefront. 
Correction is .75% for about 10 wave additional error.

Figureing out the spherical terms (correction, 2nd,
and 3rd order Zernike spherical) is key to a good
match.

Steve will probably get closer.  I have played with
2nd order and 3rd order Zernike Spherical terms as
well.  I bet Steve will be able to get those.  I
prettry sure 2nd order is fairly high.

It's Midnight.  I must stop playing with this and go
to bed.

Dale Eason.

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

> Hi,
> 
> Mike Lockwood wrote:
> > More photos (Foucault and Ronchi) of a horribly
> astigmatic mirror 
> > coming soon - you don't want to miss it!!!
> 
> As promised, I have added "Mirror #5" to my Foucault
> Testing Hall of 
> Shame, which you can visit at
> 
>
http://bi-staff.beckman.uiuc.edu/~melockwo/mirror_making/foc_hall/foc_hall.html
> 
> Scroll to the middle of the page.  Please don't do
> that to your mirror!!!!
> 
> I included the Ronchi photo in light of the recent
> discussion of 
> detecting astigmatism with that test.
> 
> Someone please estimate the amount of astig for this
> mirror.
> 
> 	Mike Lockwood
> 
> _______________________________________________
> ATM mailing list http://www.atmlist.net/
> 


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