[ATM] Large Thin Mirror

[Ted Cohen]

Dale, 

Rotation of the glass during grinding is not in question. The question you
are raising addresses whether one can grind, polish, and figure on one type
of surface (perhaps plywood, rubber, foam backing, carpeting, or pitch) and
then take the finished mirror, mount it in a floatation mirror cell, with
its different dynamic qualities, and expect the figure to be the same in
both cases. It would seem that when grinding and figuring you would want the
glass to have the same support characteristics as when the glass is finally
mounted. Am I wrong about this? 

Ted.