RE: [ATM] Optics design and vignetting

["Donald Good" <donald.good@comcast.net>]

Michael Peck wrote:

> Any competent optical design software should be able to do 
> vignetting analysis. I'd suggest taking a look at the free 
> version of OSLO or demos of any of the other commercial 
> programs before deciding to roll your own. I haven't 
> downloaded the current version of OSLO, but version 6.1 at 
> least did a reasonable job of vignetting analysis on 
> axisymmetric systems.
> 

I use OSLO Edu.  Vignetting analysis is available in their Standard and
Premium versions, but not in their Edu version.  I like OSLO Edu except for
it's lack of Vignetting analysis.  I don't want to spend money just for this
added feature.  I can write a good program, but I wanted to check with the
ATM community if the single ray trace and intercept disk method I described
previously is adequate for my purpose.


Richard Schwartz wrote:
 
> I have posted a vignetting evaluator on my web page.  It is 
> written in basic
> and runs on a Palm.   There are two stops in the parallel 
> portion of the
> light path (tube end and central obstruction) and two stops 
> in the cone (diagonal and focuser rim) but you can redefine 
> and reposition these any way you like.
> 
> Better yet, you can study how the program works to discover 
> how to build a better one.
>
Richard, is your program written for a Newtonian or can it handle more
complex designs, too?
And where is your web page?

Thanks,
Don


_______________________________________________
ATM mailing list http://www.atmlist.net/