From: "James Lerch" 
To: 
Reply-To: "James Lerch" 


Hi Jerry,

Are you using a Fixed source or Moving source Foucault platform? 
(hopefully fixed source! )

I ran your data thru FigureXP and here's the results:
http://lerch.no-ip.com/atm/Jerry.gif (22KB)

Nothing like a 0.998 Strehl to make your day, Congrats!

I'd like to ask a favor if you have the time and inclination,  would you
consider making a pinstick mask and re-testing your mirror?

The Pinstick doesn't need to have as many zones as your Couder mask, 4 or 5
would do for *this* experiment.  (If you decide to do this, I'm not looking
for a detailed surface analysis like you did with your 8 zone Couder mask.
A setup where you test a radius near your Z1 radius, another out by your Z7
or Z8 radius, and a few pins in between would do just fine for this
experiment.)

For reference, here's an image of the pinstick mask I used during my Couder
VS. Robo testing marathon
http://lerch.no-ip.com/atm/PinStick.jpg

This is a 7 zone pinstick mask, where the tips of each 'pin' are on a line
across the center of the mirror, and each tip is as at the effective radius
of the Couder mask.

The hope of this experiment is to test an hypothesis I have with regards to
my recent Couder Vs. Robo exercise, and you help would be GREATLY
appreciated!

Take Care,
James Lerch
http://lerch.no-ip.com/atm (My telescope construction,testing, and coating site)

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