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Re: [ATM] Elliptical mirror
Thank you gentlemen for your help. I feel much more confident now.
Like the old song said 'little things mean a lot'. Bob May's statement "The
elliptical surface is just a fraction of what a parabola is" really put
things in perspective. Why didn't I think of that? :-)
The nul test using the two focal points sounds the easiest. but I remember
trying to use it a number of years ago and finding it very time consuming to
set up. I must find an optical fibber and try again. Meanwhile I will Take
Dave Row's advice and try and work back. I have already been working on the
70% zone but obviously way too much. Yea....a fraction of a parabola is a
very small amount.
Thanks again
Malcolm.
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