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Making mirrors

Started by benkokes, 12/01/2005 09:48PM
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Posted 12/01/2005 09:48PM Opening Post
Ben Kokes
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Join Date: Aug 2004

Location: Manhattan Beach CA, US

Posts: 29

I was wondering today: Why are primary mirrors ONLY made out of glass? ( at least the ones in the non-research scopes)

I would figure that one could make a mirror out of and aluminum blank, or if weight want a problem, steel...

-B
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Posted 12/02/2005 03:40AM #1
Alex McConahay
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Join Date: Sep 2001

Location: Moreno Valley CA, US

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Nobody has mentioned yet--the thermal stability of the material. It does not change much when the temperature changes.

Alex
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