Re: [ATM] Basic mirror support question...

[hermit <hermit@outofoptions.org>]

You want air flow around the mirror to help with changing temperatures. 

Keh

P.K. Ferrick wrote:

>Hi all,
>
>I'm a high school physics teacher from Northern NY and, recently, the 
>recipient of a donated 17.5 inch F4.5 primary mirror.  My science club 
>students and I are planning on building a Dobsonian scope with the 
>mirror.  Since I've been hovering around the fringes of the ATM 
>community for quite a while, I think I have a pretty good idea of what 
>the scope will look like, but there are a few questions that I haven't 
>been able to find answers to in the archives, so here's one:
>
>Regarding mirror cells:  it seems to me that the more support points one 
>uses, the better able a program like PLOP is to generate a low-flexure 
>design.  Why then wouldn't a flat, continuous surface (ideally an 
>infinite number of points) give the best support? 
>
>thanks,
>Patrick
>
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>  
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