Re: [ATM] oslo edu secondary mirror data input question

[Michael Lindner <mikell@optonline.net>]

David Janello wrote:
> Thanks again for the successful help on the data
> input, may I ask a follow up question?

You're welcome. I'm no Oslo expert, but I have used it a few times...

> I am trying to view the spot diagrams over a 1 degree
> field of view but the spot diagram screen shows only a
> field of view of close to zero (5.72 e-05 to be
> exact). I googled on the web and found a few similar
> examples that worked but I couldn't see how they did
> it.

Click on the "Setup" button and set the "Field angle" to 1.

> I eventually want to optimize the design using
> aspheric surfaces on the R1 and primary to minimize
> the spot size to the edge of the field, any advice on
> setting up the OSLO optimizer for aspherics would be
> most appreciated.  

You can set variables by clicking on "Variables". Input the surface(s) 
you want to optimize, select type "Conic Constant" or whatever else you 
want to optimize, and set minimum and maximum values. Before you can 
optimize you need to click on "Optimize" and "Generate Error Function". 
Select "GENII Ray Aberration". There are lots of options, but I don't 
know how to play with those (can anyone else help here?). "Optimize" 
then "Iterate" optimizes. There is no "undo" for optimization, so you 
may want to save in case you get a worse design.

-- 
Michael Lindner
http://www.starastronomy.org *** http://home.att.net/~mikel
http://www.atmsite.org *** http://www.atmlist.net
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