From: "Jerry B. Hillman" 
To: "Ken Hunter" 
Cc: 
Reply-To: "Jerry B. Hillman" 


Hi Ken,
No I am not going to give up.  Now that I found a way to deal with the
edge, I will continue to work on it till it is right. The Ronchi test on a
star tonight with about 6 lines showing shows slight TDE. I moved the
focuser till only two lines showed.  Inside of focus they show a slight
outward curve.  Outside of focus they show a slight inward curve.  Also the
spaces between the lines are speckled. Numerous black spots.  Is the mirror
undercorrected?  Also, are the spots between the lines due to surface
irregularities?
I am depending on the star Ronchi to tell me things about the mirror I need
to know. I just need to know what I am seeing. Clear skies, Jerry

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