[ATM] perfect foucault results

[Jim Burrows]

At 2008-03-21 19:14 -0500, Paul Foreman wrote:

>I plugged in the numbers r (squared) /2R
>into Tex, Foucault, and Foucault Test Analysis 2.0B  and the mirror comes
>out as worse than 1/2 wave.

It's part of the usual conundrum, wavefront or surface, ROC or focal 
length, etc. - in this case it's probably fixed vs. moving 
source.  As I recall, Tex assumes fixed source and you have to double 
your moving source measurements (for an exact representation, you 
have to use a slightly different algorithm).  Also as I recall, 
sqr(r)/2R is moving source for a parabola.

         -- Jim Burrows
         -- http://home.earthlink.net/~burrjaw
         -- mailto:burrjaw at earthlink.net
         -- Seattle N47.4723 W122.3662 (WGS84)