From: "Nils Olof Carlin" 
To: "Cary Chleborad" , "John
Sherman"
        , 
Reply-To: "Nils Olof Carlin" 



Cary Chleborad stated:

> No one number alone can quantify the performance of a mirror.  John is
> starting to hit upon this idea, however I think the numbers that really
need
> to be considered are Transverse error (which nobody talks about)  and
Strehl
> ratio in combination.  Forget p-v - it's near totally meaningless.

I think the case *against* the transverse error has been clearly voiced on
this list - would you like to state your case *for* it?

Nils Olof

--- BBBS/NT v4.01 Flag-5