Re: ATM An efficint algorithm for robotic Foucault testing

[Hugues.Laroche@ses-astra.com]

Hi Dale,

 Hm, I am interested! Especially since I not intend to motorise
 my tester, but wish to take frames of the mirror's apearence.

 >>>
 The hard part is making all the images at the same
average intensity.  I'm not sure how different average
intensities affect the results.  I will experiment
with that next.
<<<

I am not sure I understood right: your analysis software has access to all
pixel values over the mirror? Then why not normalise the values of each
frame, say betwen 0 and 1? You see what I mean?

Also one thing you did not mention: with that you can analise the mirror
not only along the horizontal diameter, but others as well. Then you
may quantify astigmatism, and have to test other positions of the mirror
to separate the flexure part from the eventual "intrinsic" part.

Clear skies

Hugues



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