Re: [ATM] Mirror figuring problem

["Cory Kreutzer" <cjkreutze@comcast.net>]

Dave and Mark,
Thank you very much for the advice.  I imagine that you get sick of people 
asking these type of questions.
Anyway, I am using Foucault XP because I like it better than sixtests.  I 
double checked my foucault results with sixtests and the mirror looked 
exactly the same (depressed zone and turned up edge).  I made a new mask 
(thanks for the program) with five zones and exculded the inner inch.  Not 
suprisingly, the figure looks the same as that of the 4 zone test.  I will 
do future testing using the new five zone mask just for the extra data point 
and the excluded center.
I plan to do some figuring tomorrow evening using Dave's stroke advice 
(MOT).  I will let you both know what happens.

Thanks again,
Cory Kreutzer

----- Original Message ----- 
From: "Mark Holm" <mdholm@telerama.com>
Cc: <atm@atmlist.net>
Sent: Tuesday, January 03, 2006 8:48 PM
Subject: Re: [ATM] Mirror figuring problem


>I second Dave about the number of zones.  You might find my program
> CouderMask helpful, if you are running Windows.  Find it at
> www.atmsite.org  Also, if you want to judge surface shape by Foucault
> results, then use Jim Burrows' Sixtests, there is a link to it at
> atmsite.  Sixtests has the best math behind it of any of the Foucault
> analysis programs intended for manual test use.
>
> If you are judging the depressed zone and TUE by eye and
> not by Foucault numeric results, that is fine, but it will be helpful
> for us if you indicate that.
>
> I suspect Dave's stroke advice is correct also.  A depression at about
> 75% coupled with a TUE is sort of a zoney approximation of an oblate
> figure.  Short stroking TOT might well be expected to get you about there.
>
> -- 
> Mark Holm
> mdholm@telerama.com
>
> _______________________________________________
> ATM mailing list http://www.atmlist.net/ 

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