From: "James Lerch" 
To: "Mark Suchting" , "ATM
List" ,
   
Reply-To: "James Lerch" 


----- Original Message -----
From: "Mark Suchting" 
>
> At 12:11 PM 17/02/2003 -0500, James Lerch wrote:
>
> >#1 Does anyone actually "use" any of the following in Figure45
> >     A) Transverse error analysis graph
> >     B) Spot Diffraction Analysis graph
> >     C) Spot Visualization Display
>
>
> James
>
> I think the Transverse Error Analysis is well worth keeping because it is
> so instructive in giving a real handle on how different kinds of  errors ,
> throw light more or less out of the region of formation of the Airy Disc,
> due to their slopes and relative width. `Focussing' completely on a P-V
> output  is encouraging a simplistic outlook. Remember that all 1/4 wave
> mirrors are not equal.  Sure the `Strehl ratio' reflects these differences
> between `equal' mirrors, but  I think studying the behaviour of the the
> transverse graph combines with the wavefront profile can be far more
> instructive.

Mark,

Options A and B will stay :)

Now, do you or anyone else have a link on how to read the transverse error
analysis graph?  One of the reasons I've never paid attention to this chart
is I honestly don't know what its trying to tell me!

James

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