[Raytrace] Dall Null

[John D. Upton]

Tom,

At 06:59 PM 9/5/2002 -0700, you wrote:
>  IMS       --         -0.751790      0.042799 S
>
>It is almost exactly the same as yours. Troubling that
>I didn't get the same result. Can you think of any
>reason for this?

    The only significant difference I see is the image surface 
distance.  Try refocussing for "Minimum On-axis RMS OPD (Monochromatic)" 
and see what you get.  If that still shows differing results, try manually 
setting the image surface distance from -0.751790 to -0.529301 and check 
the wavefront again.  If anything, you should be seeing a slightly *better* 
wavefront error than I because the beam doesn't quite cover the whole 
mirror in your set-up.

     I am at a loss to explain why OSLO seems to behave differently on our 
systems.  I cut the file from my 04 Sep 2002 18:50:47 post and tried it on 
a couple of other systems.  I get identical results on all.  Which level of 
OSLO-LT are you using?  My file was done with version 6.04.  Anyone else 
have any ideas?

Sincerely,

John D. Upton
Georgetown, TX
<http://www.atm-workshop.com/>      "The ATM's Workshop Page"
<http://hometown.aol.com/RonWin20/>  "Ronchi For Windows Software Page"