ATM AO and Youngs Modulus for glass

[GregJ888@aol.com]

I'm looking for the youngs modulus for glass (Pyrex ?) and the formula for
deforming a thin disk for my Adaptive Optics project.  Have about everything
but glass for 1 and lots of beams for 2 but would like to be a little closer
if I can.

This is intended to go on the back of the 20" Cass, but have gotten into the
AO
system and the 20" blank is still in the box...  The wave front sensor is
together and seems to function well.  It is a Shack Hartman type with 4 sub-
apertures.  This 
is enough to sense the first 5 Zernike terms (tip, tilt, focus, astigmatism(0)
and Astigmatism(45)).  All 4 are focused onto a single CCD (Cookbook 245).

Next is the Bi-morph mirror.  Have a test mirror and have done rough testing 
with it.  Again, thing look real good- with but in this case with lots of
uncertainty.  Now to do the actual calculations for the actual system mirror.

I also need to thank the gentleman from BC who attended the Bellingham ATM
Workshop, and who's name and email address I have lost.  I had given up on the
though of using a Bi-morph mirror and had planned to use 4 tip/tilt mirrors to
cover
the full aperture (segmented mirror).  Thanks for pointing me back in this
direction,
and if your out there, please make contact :-). 

Still needed- 1)  HV amp for the Bi-morph +/- 200V, 5-8 channels
                    2) Lots and lots of software- when the rain come back to
Oregon-
                    3) 20" scope....