From: "Bob May" 
To: "atmlist" 
Reply-To: "Bob May" 


Paul, The only problem with the mirror being the KE is that the edge needs
to be a good smooth and straight one, something that isn't necessarily so.
Using a seperate KE makes that problem irrevelant. I'll note that when
using a KE seperate from the slit source, you have to make sure that the
two edges are parallel or the mirror will indicate an astigmatic condition 
where the shadows start at the tip (bottom) and proceed to the other end.
Bob May
http://nav.to/bobmay
bobmay{at}nethere.com
NEW! http://bobmay.astronomy.net

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