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[ATM] Gimbaled Secondary mirror
Thanks Mauritz, I grabbed the article and read it, looks like I just need to
limit the tip/tilt to a smaller amount or actively adjust the focus on
larger moves. I think the later is easier and besides we're talking about
arcsecond tip/tilts in this mode, then god forbid move the scope.
The gimbal should support a 12 arcminute cone just for alignment
calibration.
I'm rapidly getting an education in design limits, I'm glad I posted the
question.
>This is discussed in the article by Wetherell and Rimmer, Applied Optics
>vol 11 page 2817-2832, 1973. Distance of this neutral point from secondary
>surface is according to their analysis L=R (1+m) / [ (m+1) - (k-1)(m-1) ]
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