Re: ATM A PLOP result

["Jan van Gastel" <jhm.van.gastel@mdw.vu.nl>]

To me it sounds reasonable. You didn't miss anything.

Jan
http://www.geocities.com/janvangastel/

----- Original Message ----- 
From: Ken Lilja <klilja@atl.mediaone.net>
To: <atm@shore.net>
Sent: Tuesday, December 05, 2000 4:12 AM
Subject: ATM A PLOP result


> 
> Hi,
> I am redesigning my mirror cell and ran my numbers through PLOP.
> My Pyrex mirror has an OD of 12.6" and an average thickness of 1.9".  If
> I run a 4 point cell I get an error of 2.01375e-06 mm RMS and a support
> ring at .508337 X radius.  This is approximately 1/2 the max error of
> 4.20e-06 mm as per the web page user manual.  As a reality check, does
> this sound reasonable or have I missed something? 
> Looking forward to any comments, soon to be cutting wood and metal.
> Ken Lilja
> Snellville GA USA
> 
>