Re: [ATM] RE: Stabilizing plate glass

[Ken Hunter <atm_ken_hunter@yahoo.com>]

Julio...

Plate glass is so temperature sensitive that
essentially no one wants to invest the time into
putting a flat surface onto one because the end result
is an uncertain surface unless you are going to keep
them in a controlled environment.

You would not want to use a plate glass "flat" to test
a pyrex mirror for instance. In industry, the tool
(flat in this case) MUST be better than the part being
measured.

Ken Hunter


--- Julio Sanchez <jsanchez@skipanon.com> wrote:

> Hi all, happy new year.
> I have a few plate glass blanks laying around and
> was thinking of making a
> set of optical flats out of them. In the past I have
> noticed that it takes
> up to 24 hours for the plate glass to stabilize
> after polishing or figuring.
> In other words, you polish for 10 minutes and then
> wait 24 hours to see what
> you have. Recently I read on this board that placing
> the plate glass blank
> in water makes it stabilize in about 30 minutes. Has
> anyone had experience
> with this or any other way of stabilizing plate
> glass blanks?
> Regards,
> Julio
> 
> 
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> ATM mailing list http://www.atmlist.net/
> 



		
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