[ATM] Flexing mirrors to different shapes...what about Cassegrainsecondaries?

["lou krajci" <loukrajci@comcast.net>]

Has anyone investigated the possibility of flexing/pulling/(pushing?)
Cassegrain and Gregorian secondary mirrors to the desired shape?  It's been
done for spherical main mirrors to make them paraboloids...but what about
Cass/Gregorian secondaries?

Considering how much difficulty there is with fabricating and testing some
of the shapes...would it be easier to flex a well tested spherical secondary
to the desired shape?  What parameters of glass thickness and size would be
needed to flex/push/pull a spherical secondary to the desired shape for a
'typical' Cass or Ritchey or Gregorian?  (At least for typical amateur
secondary mirror sizes...you don't have to worry about gravitational
deformation of the mirror.)

Thoughts?

Tom Krajci
Albuquerque, New Mexico
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