Re: [ATM] Re: 1- Astatic Mirror Cells (Was:Re: Use of bearingsin(static) mirror cells)

["David Harbour" <scarab2@cox.net>]

The pictures of the French 31" are wonderful!

Thanks, Matt-

Dave


----- Original Message ----- 
From: "matt" <electro_optic@bellsouth.net>
To: "ATM List" <atm@atmlist.net>
Sent: Wednesday, April 20, 2005 4:08 PM
Subject: [ATM] Re: 1- Astatic Mirror Cells (Was:Re: Use of bearings
in(static) mirror cells)


>
> There are some large by amateur standards astatic mirror cells, some of
> their designers/builders are on this list, however, the signal to noise is
> so low (or noise level is so high) in this thread that people lose any
> incentive to come forward and show their accomplishments.
>
> Here are some links to French amateur astatic cell equipped scopes .
>
> This is a link to a 600mm (~24") aluminum scope (including apparently some
> aluminum honeycomb) :
> http://www.astrosurf.com/tests/t600/t600v2.htm
>
> This one's to an even larger 800mm (~31") scope:
> http://www.astrosurf.com/altaz/800.htm
> Its builder is working on a 40" . He's on this list, and could be
persuaded
> to show more .
>
> Here's a pic of the Palomar 200" mirror back with the astatic levers in
> place:
> http://www.sandiegohistory.org/journal/98fall/images/80-1092.jpg
>
> Mirror cell technical memo for the 8.4m LBT telescope :
> http://medusa.as.arizona.edu/lbtwww/tech/ua9502.htm
>
> ESO website has a wealth of info , including on the VLT telescope and its
> primary cell+ its actuators/support/active optics:
> http://www.eso.org/toc/toc.html
> http://www.eso.org/projects/vlt/unit-tel/m1cellm3.html
>
>
> The subject of mirror cell friction+stiction+RTV gluing pros and cons is
> brought up periodically on the list, it wouldn't hurt newbies or people
> looking for more precise and accurate details to search the archives .
Less
> than a year ago we had an indentical discussion .
>
> best regards,
> matt
>
>
>
>
>
>
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>
>
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>


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