Re: Grinding a flat
Chuck Grant (grant@aretha.llnl.gov)
Mon, 1 May 95 18:12:09 -0700
> From: Bob Madden <madden@netcom.com>
>
> Sigh, a friend and I occasionally discuss making a flat, but we are
> intimidated by obtaining a reference. Is there a way to test a flat that
> is as easy to use as a ronchi test? If we could, we would like to make a
> 6-inch flat for a celeostat (spelling?). Well it is just a thought - any
> ideas?
>
> Bob
>
Sure, just make a reference sphere, bigger than the flat, and do a
ronchi test on the sphere via a reflection on the flat near the sphere.
Or you can use any other kind of test for a sphere, via a reflection on
the flat. It is even a two-pass test for the flat.
Chuck