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Re: [ATM] HOW TO TEST THE SECONDARY MIRROR OF GREGORIAN
hello,
to produce a telescope "gregory" is not very difficult, the two mirrors
being concave, one can test them by the traditional method .
the secondary mirror is slightly elliptic, one can test it with a mask of
couder
looks at this links to start.
http://bobmay.astronomy.net/johnpierce/part9.htm
regards
franck griére
www.mirro-sphere.fr
11 impasse des carriéres
58180 marzy
0386613733
----- Original Message -----
From: "seyyed mahmoud ghasemi" <modeler72@yahoo.com>
To: <atm@atmlist.net>
Sent: Sunday, August 12, 2007 4:13 PM
Subject: [ATM] HOW TO TEST THE SECONDARY MIRROR OF GREGORIAN
> DEAR LADIES AND GETLEMEN,
>
> I AM PLANING TO MAKE A GOOD GREGORIAN TELESCOPE , AND APPRECIATE TO GET
THE EXPERIENCES OF MAKING AND SPECIALLY TESTING THE SECONDARY MIRROR ....
>
>
> NOTE : IF THERE IS SOMEONE WHO HAS MADE THIS TYPE OF TELESCOPE AND
SUCCEEDED , I APPRECIATE TO USE HIS EXPERIENCES AND LEARN SOMETHING
ABOUT IT...PLEASE GUIDE ME
>
> FAITHFULLY YOURS,
> S.M.GHASEMI
>
>
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