Re: [ATM] 7 inch sphereical mirror

[Dale Eason <atmpob@yahoo.com>]

According to my calculations using OpenFringe the
answer is yes.  The RMS error is 1/21 wave and the
strehl is .92.

Lets see what the Math wizards say. 

However one usually does not get a perfect sphere, so
what ever error it has on the opposite side of
correction will make it worse.  If on the other hand
it has a little correction then that is even better.  


Dale Eason

--- Russell Jocoy <russjocoy@hotmail.com> wrote:

> 
> To all,  Can a 7 inch disk be formed to a sphere and
> polished at f/10 and not be parobolized?..
> And produce correct images to the eyepiece??   There
> are dispute's on this answer..Russ
>
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