Re: ATM gluing glass

[Andy Saulietis <iss@pvtnetworks.net>]

Jim L writes,

>>the layers of glass does not conduct as well
>>as the glass, so thermal gradients will exist
>>between the layers & mess up the figure.
>>I tried this (1/4" plate, 6" dia, 4 layers),
>>using optical cement. *Dismal* failure...
>
>I'm curious how much stabilization time you tried on them?

It seemed to grind OK but after it was polished I got
asymmetric focault patterns, like astigmatism and
the yin-yang figure which changed with time. 

I then bought a 6" Edmunds Pyrex mirror kit & made a
fairly good f12 spherical mirror as my first
ATM effort.


Andy Saulietis
ISS Enterprises
39 Silver Fox Trail
Mayhill NM 88339
505-687-3067 voice
505-687-3021 fax, call voice or e-mail to set up
e-mail: iss@pvtnetworks.net