Re: [ATM] Thermal mirror deformation -fan on both sides

["Mitch" <funnybone101@earthlink.net>]

     Just another thought on this subject. If you have fans on both sides,
won't you have to have fans at the top and bottom too? And then on the
diagonals inbetween, theoretically you would need a continuous circle of
fans. There must be a point when the areas not being "fanned" is negligible,
but when talking about .08 degrees between the front and back (not sure how
thick?) temp on a 16" mirror making a difference of 130nm or 1/4 wave
(someone else said this, not sure if it is 100% correct).

     The point is, I may be overcomplicating things, but with such small
tolerances of temperature difference how can we be sure even 4 fans, each
blowing at the mirror 90 degrees apart is enough?

Mitch  

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