To: atm{at}shore.net
From: "James W. Burrows" 
Reply-To: "James W. Burrows" 


At 16:03 2002-12-20 +0500, Tom Krajci wrote:

>What if I want to test for trefoil or other higher orders of
>astigmatism?!  You just wave your hand and say it's not there?  I'm
>supposed to be satisfied?  Maybe I should join that local college mirror
>workshop you mentioned.  Then I would be blissfully ignorant of the
>problem.  (Problem...what problem?)  ;-)

It's coming, it's coming - my 1.5 year fiddle with web cam Hartmann.  It
sure shows test stand pinch (I think) and higher order astigmatism would be
easy.  A couple of tough bits:  the mirror will probably have to be tested
on its cell, the mask ain't easy to make, and you need a good computer to
run the reduction program (other than overnight).

         -- Jim Burrows
         --              mailto:burrjaw{at}earthlink.net
         --              http://home.earthlink.net/~burrjaw
         -- Seattle      N47.47233, W122.36620 (WGS84)

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