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Re: [ATM] Phase contrast and the 10 incher.

Steve,

Based on the clarity of the wormtracks all over the mirror in the foucault
image, I would say they have to be multiple wave faults, if they were
surface features. Such deviations would surely show up in the raw
interferogram, but all I can see is low frequency abberation, and only to
the right edge there's a hint of phase shift.

I'm close to giving up the guessing ... Dale you can reveal the answer now
;-).

   Arjan

----- Original Message ----- 
> So...this experiment is inconclusive.  I think that if the worm tracks
> are on the surface to be picked up by interferometry, it would need
> less noisy interferograms to see them.  I don't think this constitutes
> proof that the worm tracks are below the surface.

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