Re: [ATM] Figuring Help Request: 6" F7 - Which Stroke Next?

["Stathis Kafalis" <info@stathis-firstlight.de>]

Hello Joe,

I see a wavefront p/v of better than Lambda/10 and a Strehl number of better
than 0.98.
Many mirrors show a tendency to to have a slight low edge. Thus the value of
the last outer zone is measured in Foucault a bit less than it really is, as
you cant realy measure a slight low edge. For that reason I would allways
preffer a mirror with a slightly undercorected outer region than vice versa -
and this is exactly what you have. So, if this mesurements are made
thoroughly, you have a perfect mirror.

Does 0.98 Strehl not sound good enough for you? If you don't trust your
numbers, apply a star test before further "improving"

Stathis Kafalis
www.stathis-firstlight.de
Mirror Making Material in Europe:
http://www.stathis-firstlight.de/spiegelschleifen/materialeng.htm

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