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

[klappal at xnet.com (Richard Klappal)]

Wouldn't an astroturf 'spacer' get rid of the sag without fiddle-faddling
that much?

-----Original Message-----
From: atm-bounces@atmlist.net [mailto:atm-bounces@atmlist.net]On Behalf
Of Jeff Anderson-Lee
Sent: Friday, 13 February 2004 10:23
To: artbianconi@blast.net
Cc: atm@atmlist.net
Subject: Re: [ATM] If it's in a supremely stiff cell, that does not
twist,why would a thin mirror sag?


artbianconi@blast.net wrote:

>No matter how I try I cannot fathom why a thin mirror would not maintain
its
>parabolic surface if held by a uniformly planar cell made of of carbon
fiber.
>
>
Did you grind and polish the back of your mirror into a 10th wave flat?
Will you do the same with the carbon fiber?   Otherwise, how you you
know they are "uniformly planer"?   One problem comes in trying to make
it stiff AND flat at the same time.


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