Re: [ATM] comprehensive thin mirror grinding

[Mike Lockwood <melockwo@uiuc.edu>]

Marco,

Try

   http://www.efn.org/~mbartels/tm/largthin.html

and

   http://www.newportglass.com/grind1.htm
   http://www.newportglass.com/grind2.htm

One reason there is no one-stop resource is because large thin mirrors 
are difficult (putting it mildly), and lots of people have developed 
their own techniques that solve the particular problems they have. 
Problems depend on the work environment, whether you are working by 
hand or not, etc.

If you have made mirrors before, you might start thinking about a 16" 
x 1" thick mirror.  Then go larger from there and find what works for 
you.  I wouldn't recommend a large thin mirror as a first mirror.  (I 
can't remember what your experience level is.)

Figuring large mirrors is an art form, in my opinion, and the way to 
learn it is sheer persistence and careful observation.... and lots of 
beer.  That's how we did our 30" F/3.8.

	Mike Lockwood


Darran Summerfield wrote:
> "The Dobsonian Telescope" by Kriege and Berry has a good section on it.
> 
> Darran
> Boston Spa, UK
> 
> -----Original Message-----
> From: atm-bounces@atmlist.net [mailto:atm-bounces@atmlist.net] On Behalf
> Of marco miglionico
> Sent: 15 October 2004 18:47
> To: AMT LIST
> Subject: [ATM] comprehensive thin mirror grinding 
> 
> Hello all,
> 
> Does anyone konw of any one-stop resources for large thin mirror
> grinding.
> I have found snippets on the atm list but nothing that details the
> process
> fully
> for large thin mirrors. Any books/journals also.
> 
> Many Thanks,
> 
> Marco Miglionico.

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