From: "Richard Schwartz" 
To: 
Cc: 
Reply-To: "Richard Schwartz" 


It is all a question of relative stiffness.   Suppose the glass is a hundred
times as stiff as the support platform, and suppose the support platform
warps .01" without the mirror.   Then the mirror in contact with the
support
platform will warp .0001".   That is about five waves.   Of course, if your
glass is thin, it might only be ten times as stiff as the support platform,
and things get worse....  MUCH worse.

. . . Richard

----- Original Message -----
From: 
To: 
Cc: ; 
Sent: Saturday, May 03, 2003 8:32 PM Subject: Re: ATM Polishing out astigmatism


>
>
> I would polish the old fashioned way after the machine got hold of it, if
the astig isn't more than a few waves off.
>
> If it is a great deal off, consider a nonwarping material for the
turntable components and see if that helps.
>
> Kevin of Eastern Iowa
> Seeker of the Darkness
>
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>

--- BBBS/NT v4.00 MP