Re: [ATM] Inverse Ronchi program

["Bob May" <bobmay@nethere.com>]

The inverse Ronchi test is just the Ronchi test done with
pregenerated lines on the mask.  The intent here is to have the
results be quantative as well as qualitative as the correct curve
on the glass will have straight lines when you look at the
mirror.
At F4.2, you aren't too fast for the Foucualt test but having 7
zones or more will make the testing more accurate.  You might
also want to consider other tests as well.  The wire test is
where a wire is used that is slightly larger in diameter than the
slit used and you are basically doing a double edged Foucault
test which produces a ring at the zone of interest.  Just put up
an Everest stick and set the table at each of the zones just like
the Foucault test so that the ring is at the pointers of the
stick.  There is also the DAFT test which is probably better done
on the silvered mirror as the diffraction spikes will be brighter
where you look at the ROC point with a lens and put the two sets
of diffraction lines so that they have a common center.
Bob May
bobmay at nethere.com
http: slash /nav.to slash bobmay
http: slash /bobmay dot astronomy.net
Replace the obvious words with the proper character.

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