Re: ATM Homemade Ronchi Grating improved

[astillma@nit.AirTouch.COM (Anthony Stillman)]

I generated a Mobosy for the Group 70 mirror.  It works, but placement, as is
true for all null test, is very critical.  

I used a short cut to make mine.  Using IRT, I noticed that masks are projected
back all the way to the source.  Hence, I was able to construct a ronchii mask
on the image side of a simple lens (your eye) and then look at the spot diagram
just in front of the primaries focus.  Wala a Mobosy.  I thought about doing the
math, but hey, do it so it gets done.

Anthony