Re: ATM An $18.00 Null Test

[Ric Rokosz <bz737@freenet.toronto.on.ca>]

On Mon, 26 Jul 1999 Aplanatic@aol.com wrote:

> 
> I have discovered that one can null test almost any paraboloidal (or other 
> conic section) mirror using a single lens in front of the knife edge and a 
> good quality diagonal mirror.  The idea is the following, best told by an 
> example:

Think  you've rediscovered the Ross null test.Get the software from Mel's 
site and articles in the late series of TM. Author Ceravolo.

Ric