Re: Alternative mirror technologies, WAS ATM Liquid-mirror telescopes

["Fred Maxwell - No spam e-mail accepted." <fmaxwell@erols.com>]

John D. Gwinner wrote:

> My concept was that the epoxy sub-strate, which would not actually
> contact
> the mylar, would act as a 'form' to get the desired focal length and
> parabolic shape that you need.

So, given the questionable surface quality of any mylar that I have
seen, it seems to make more sense to just aluminize the epoxy form and
use that as a mirror.  If you can make the epoxy accurately enough, why
introduce the variable of questionable thickness and finish mylar over
it?

Regards,
  Fred Maxwell