[ATM] Re: If it's in a supremely stiff cell, that does not twist,why would a thin mirror sag?

[sho at surfnetUSA.com (Steve Houlihan)]

Art wrote:

>
> In any case, there also is no demonstrated need for the a 1/10 wave
precision
> on either surface The mirror will "float" in a thin (0.001 to 0.005") film
of
> Teflon that is soft enough to conform to slight surface irregularities and
> slippery enough to float and achieve equilibrium.
>

This thread started with a discussion on the effect of support torque on the
shape of the mirror if one used RTV to attach the support.  Various other
support schemes have been discussed as well.  There has also been some
comparisons made with slings and two point lateral support systems vs. using
RTV.  Through this entire discussion I have been assuming you were planning
to use RTV or something similar to attach your mirror to the carbon fiber
base plate.  In this paragraph you say that there will be a layer of Teflon
between the mirror and the support plate.  So, this brings us full circle.
What are you using for lateral support?  What are it's effects on the shape
of your mirror?

Inquiring minds want to know.

Steve Houlihan
Santa Cruz, California

sho@SurfnetUSA.com
http://www.surfnetusa.com/sho