RE: [ATM] RE: Stabilizing plate glass

["Julio Sanchez" <jsanchez@skipanon.com>]

I understand. If I make these flats (if, mind you) they will be used only in
testing. That is, the flats would never leave the lab.

How about the water bath? Does it work?

Thanks, and regard,

Julio

-----Original Message-----
From: Ken Hunter [mailto:atm_ken_hunter@yahoo.com]
Sent: Tuesday, January 04, 2005 11:59 AM
To: Julio Sanchez; atm@atmlist.net
Subject: Re: [ATM] RE: Stabilizing plate glass

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
>
>
> _______________________________________________
> ATM mailing list http://www.atmlist.net/
>




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