Re: [ATM] Flexing the Ubiquitous 4.5-inch Mirror

[David Taft <taftdb@yahoo.com>]

> If you  have made a "perfect" sphere, center pull will give you an
> optic better than 1/20th wave. If that is not good enough let me 
> know and I'll suggest a simple ring pull flex cell that will do much 
> better (?) In the real world it won't improve your images. 
> Alan's "distributed load" flex scheme is needed for larger and 
> faster mirrors.
> 
> One important way to reach best resolution is to reduce light scatter
> by making your mirror very smooth.

Bill,

This mirror is part of a commercial scope, Meade, that my wife has been
using for several years.  If this mirror is capable 1/20th wave, that
would be great, but now I am curious about your ring-pull flex method. 
Do both methods construct the pusher using an isotropic plate with a
lower hard-rubber ring and an upper foam-rubber ring?

Thanks,

David Taft
Manassas, VA

z
  z \|/// 
   ('~ ~') 
-ooO-(_)-Ooo- 
  David Taft
 Manassas, VA


		
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