From: "Thomas" 
To: 
Reply-To: "Thomas" 


Bob, I have posted a pic of the secondary under test on my web site. The
pic is located under the US mirror page as a subpage devoted to the
secondary. Best way to get there is via the ATM stuff page. Just go to the
mirror on the hoof bit....

Clear skies, Thomas.
www.tjanstrom.com
----- Original Message -----
From: "Bob May" 
To: "atmlist" 
Sent: Wednesday, June 11, 2003 4:34 AM Subject: Re: ATM DK secondary


>
> Fringe errors can be of the pure spherical form or of some more complex
> form.  Spherical error is merely the difference of radius of the two
> surfaces and will be of no concequence.  If you have only 2 rings when the
> two surfaces are not wedged, you are very close to the desired curvature
and
> it would be a decent time to stop.  The shape of the lines will determine
if
> the surface is indeed a sphere and, if so, it is time to quit and get it
> aluminized.
> You can then finish up any errors on the surface with changes to the
primary
> to compensate.
> Bob May
> http://nav.to/bobmay
> bobmay{at}nethere.com
> NEW! http://bobmay.astronomy.net
>
>
>

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