ATM testing a flat mirror

["A. Suykerbuyk" <asuyker@wxs.nl>]

Hi,

I wonder if a parabolic mirror could serve to test a flat mirror.
First you could test the parabolic mirror using a Couder screen.
When done the flat mirror can be placed before the parabolic mirror using
the Ritchey setup.
One does the same test via the flat mirror.
The difference in readings should give information about the quality of the
flat mirror.
Any thoughts?

Regards,
Adrie Suijkerbuijk.
>