RE: ATM Epoxy spin-cast mirrors: comments for experimenters

[Andy Saulietis <iss@pvtnetworks.net>]

Hi Clark,

>>UV cured epoxy mught be a way to quickly solidify
>>a mirror if the spin problem can be solved, perhaps
>>with real-time figure testing to know when to 'freeze'
>>the epoxy.
> 
>That's a really good idea, assuming that a UV cured epoxy is available with
>reasonable properties.  I'm not that familiar with them.

The UV cure epoxies are used to cement lenses, and also
to do dental repairs. Edmunds sells the stuff IIRC. Cure
times are a few seconds depending to temp/thickness etc.
Maybe a glass substrate ground ~ spherical with a *thin* layer
of epoxy to form the paraboloid & give the stiffness and
resistance to warpage? CTE delta should be ok if the epoxy
is << thickness of the glass.








Andy Saulietis
ISS Enterprises
39 Silver Fox Trail
Mayhill NM 88339
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e-mail: iss@pvtnetworks.net