[ATM] hole?

["c f" <quantemlp@hotmail.com>]

Hello to all,

I have gone and created a great spherical mirror that is a 6" f/7.4.  I then 
put the mirror away as I had a lot of other things that needed to be done.  
Now after a brief absence, I am back and wanting to get this mirror done.  
The mirror has sat for a few weeks in a stable envirorment and testing in 
the same room.  I have started to figure it out and did some testing on it.  
I am using the program ronchiz and took some photos at
-1 -2 -3 -4 -5 -6 (tenths) inside ROC.  It seems that I have a nice hole in 
the center and outside the hole, seems to match fairly nicely with the 
ronchiz program.  Would the next move be to use a very short stroke COC with 
MOT to head me back to spherical? or to widen out this hole by using 
figuring stroke keeping 1/3 overhang.  Or would there be something different 
that I would do.  I will post some photos of my findings tonight on my web 
site.  Thanks to all that can help me out.  You people are a great source of 
information and a wonderful help.

thanks again,

Charles in wilmington.

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