From: "Mel Bartels" 
To: 
Reply-To: "Mel Bartels" 


>>>
We're now discussing taking out of focus images of bright stars, similar to
the Hartmann test, but with no mask. The two images would be scaled and
subtracted, yielding an intensity pattern that could be used to deduce the
shape of the mirror..Suiter's descriptions of the star test are an
empirical eyeball method of doing this.
<<<

Sounds similar to what Benoit Schillings was discussing years ago with
respect to adaptive optics.  The resulting pattern of light would be used
to compute actuator commands to null the light into an even gray.

Mel Bartels

--- BBBS/NT v4.01 Flag-4