Re: [ATM] RTV or not.

["Marco" <marco.miglionico@btinternet.com>]

Sorry,

I already ran the PLOP for the 3 point cell.
My mirror is 50mm thick, 300 MM dia F3.3 Duran glass and 75mm flat
PLOP plops out fine at around 1/16th wave

My question was whether or not so silicon RTV or make a standard sling cell!
But it turned into a discussion about support points.

Many thanks,

Marco Miglionico


----- Original Message ----- 
From: "Mark Holm" <mdholm@telerama.com>
To: "AMT LIST" <atm@atmlist.net>
Sent: Saturday, October 07, 2006 1:45 AM
Subject: Re: [ATM] RTV or not.


> Michael Lindner wrote:
>
>> Marco,
>>
>> I thought the consensus was you needed at least a 6 point cell.
>
> Marco has not sent me all the data, so I haven't run Plop for his mirror
> yet.  3 points might be all right, but is very close to being not good
> enough, and I would like to run Plop for the specific case to be sure.
>
> Needed data
>
> Diameter
> Edge Thickness
> Material Type (Pyrex, Plate, etc.)
> Diagonal Minor Axis
> Mirror Center Hole Diameter (if any)
>
> Diameter and edge thickness should be measured to 1 mm, or even 0.5 mm
> on the thickness.  Things change rapidly with thickness on these thinner
> mirrors.
>
> I don't charge for Plop analysis, my turn around is usually under 48
> hours and if you decide not to take my advice, I just forget about it.
> Nothing to lose!
>
> BTW, 6 is not the only next step up from 3.  Plop computes 4 and 5 point
> cells just fine.  Examples at
> http://www.atmsite.org/contrib/Holm/Plop_optimized_cells/index.html
> Be the first on your block to build one!
>
> -- 
> Mark Holm
> mdholm@telerama.com
>
> _______________________________________________
> ATM mailing list http://www.atmlist.net/ 

_______________________________________________
ATM mailing list http://www.atmlist.net/