[ATM] I love glass too

["Jean-Guy Moreau" <jgmoreau@cablevision.qc.ca>]

Hello Russ, i just wanted to point out what exist.

Of course i am a firm believer in glass, see this image of the current mirror
i am working on :

http://www.cablevision.qc.ca/astro/22ins_figuring.JPG


It is 22" f/4.3, faceplate just 1/2" thick, backplate 3/8"
glass is fused at high temperature, it works.

Cheers,

Jean-Guy


----- Original Message ----- 
From: "Russell Jocoy" <russjocoy@hotmail.com>
 
> ============================================================
> 
> Jean-Guy,    Thanks for the listing, This sounds way out there to me.. 
> Hydrostone is not stable,and I am sure "you" aren't looking for a hydrostone 
> mirror coated with anything. Glass is a nice semi-stable substance that is 
> real happy for long years of use. Galaleo's (sp) first telescope had a glass 
> lens and I bet it is still intact somewhere. Moulding glass is tricky, 
> molding plastic is more accurate. I don't want a plastic or carbon silicate 
> lens on my telescope, I have them in my eyeglasses (they are scratched to
> hell)  .. Russ Jocoy
> =============================================================

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