Re: [ATM] Cell triangles and rtv

[Alexis Cousein <al@sgi.com>]

pauldkline@aol.com wrote:
> On cells with triangles, if you rtv all three points on every triangle 
> doesn't that create some stress when the glass contracts? 

Yes, but they're in the plane of the bakc of the glass (which,
fortunately, is quite thick in that dimension ;) ).

Your real worry is the levers and forces that occur when you have fixed
mirror support points and point the scope down, and the glass doesn't
even need to contract for that to be an issue; you're effectively
creating a kind of "edge support" that's not in line with the mirror
COG.

I'm partial to nylon screw heads myself (or anything that
would use really smooth ball bearings or teflon). If the mirror wants
to move, let it.

-- 
Alexis Cousein                                  al@sgi.com
Senior Systems Engineer/Solutions Architect     SGI/Silicon Graphics
--
<If I have seen further, it is by standing on reference manuals>

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