[ATM] Worm track update

[Dale Eason <atmpob@yahoo.com>]

I looked at the 10 f5 60 year old uncoated Pyrex
mirror under different lighting conditions last night
when I took it back to the makers shop.  I could see
what looked just like a worm track but it was inside
the glass.  It did not show up in the Foucault image. 
So now with that info and the interferometry info I
believe the worm tracks are structures in the glass
that the grinding and polishing carved down into. 
Probably no amount of polishing will remove them. 
They are caused by the way the Pyrex was poured into
the mold.



Dale Eason


 
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