From: Dominic-Luc Webb 
To: Jeff Anderson-Lee 
cc: atm{at}shore.net
Reply-To: Dominic-Luc Webb 


On Mon,
 28 Apr 2003, Jeff Anderson-Lee wrote:
> I'm soon to work on a thin (7/8in) 16in mirror.  I'd considering making an
> 18 or 27 point working cell with 6 side-brace points so as to transfer the
> working load more evenly to the glass.
>
> My first thought was to RTV the cell to the mirror, but I suspect that
> I'd simply work in astigmatism that way.  The next thought was to use
> teflon pads and rotate the mirror as I work it, but that would probably
> result in astigmatic rings.
>
> The third idea was to use a circle of 3/4" plywood with astroturf
and 6 side
> brace points on one side and a 27(?)-point cell on the other.  Any thoughts
> on whether that might help (or hurt)?

If we are to go to extremes, we could also go for adaptive optics. I
personlly like the idea of a glass honey comb pattern fused to thin plate
glass. I have yet to try it, but it looks like a straightforward solution.
Some people seem to have success with it. Maybe this is an option for you?

Dominic

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