[ATM] is mirror thermal equilibrium important

["Vladimir Galogaza" <vladimir.galogaza1@zg.t-com.hr>]

"Anything that can happen, will happen"

So sprah James:
>The final result had 18 1k ohm resistors @ 12v (2.6watts) heating the 
>backside of each
>primary with the existing 4" fans blowing ambient air across the front of 
>each
>primary.

Imagine, after tons of discussions about indisputable need for mirror
temperature equilibrium,  e.g.. while on test stand, while waiting for
observations, while pressing... etc),   one demonstrably
practical & working solution  is  using forced heating of backside
and forced cooling of the front side of the mirror while in use.
Thus warranting lasting temperature gradient across the mirror.

Is this end of one more dogma ?
Very likely yes, because it comes from very reliable source.

Thermal equilibrium redefined:
 It does not necessarily mean that
all parts of mirror are or should be at the same temperature as
environment.. It may mean that it does not hurt if
temperature gradient is present if it is temporally and spatially constant.
Because in this situation mirror figure, whatever it is,  will not change.
That it will be different than at test stand is another story.

Regards
Vladimir. 

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