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Re: [ATM] Determine the glass type of a primary mirror

To: "Olivier Biot" <olivier.biot@versateladsl.be>, <atm@atmlist.net>
Subject: Re: [ATM] Determine the glass type of a primary mirror
From: "Jerry B. Hillman" <JBHillman@ev1.net>
Date: Sat, 12 Feb 2005 16:56:22 -0800
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Olivier,
I am assuming you can see through the edge of the glass.  If it is green
tinted, then it is plate.  If it is clear, then it is most likely pyrex.
Zerodur that I have seen on surplus shed has a yellow tint.  I have no idea
what other substrates look like.

Clear skies, Jerry

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References:
- [ATM] Determine the glass type of a primary mirror
  - From: "Olivier Biot" <olivier.biot@versateladsl.be>

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