Re: [ATM] RE:anealing

["David Harbour" <scarab2@cox.net>]

Try Parks Optical.

The man who owns it is a close personal friend of mine, and I can vouch for
his character, and at least at one time, his blanks.

Dave

(P. S. -He is not an annealer; United does not sell to the public)

Dave

P.P.S.- When I was in business as Great Plains Instruments, and refigured
mirrors, I never had one act like this- capriciously, as it were, so to
speak. I refigured quite a few mirrors. Some only took 30 minutes to
refigure; some took three weeks. United anneals their glass; they are well
known, well established, have a huge diversity of optical products for sale.
Parks buys some of their blanks from United. By the way, the mirror that
took only a few rounds around the work stand was only oblate- nice and
smooth and regular, just oblate as heck. The guy had the right shadows; they
were just the opposite of what he needed. It looked like a paraboloid, but
the knife was on the wrong side. Easy to fix. 30 minutes, sent him home to
Kansas, where Toto and Dorothy live.

Don't try them as "Parks Optical"- try them as "Scope City"- there is a link
on my page, here, at the bottom of the page, to Scope City (not an
endorsement; it's just there, has been there for a long time- I know Dr.
Sweiss, he is a very nice, and quite honest man- asked me to be his head
optician twice)-

http://www.atmsite.org/contrib/Harbour/Foucault.html

Look at bottom of page.

Dave

----- Original Message ----- 
From: "Julio Sanchez" <jsanchez@skipanon.com>
To: <atm@atmlist.net>
Sent: Saturday, May 21, 2005 3:26 PM
Subject: [ATM] RE:anealing


> I once bought a 10" by 2" Pyrex blank from one of the well-known (and
badly
> reputed) suppliers and ended up calling it the Frankenblank. It seemed to
> have a life of its own and the figure would change overnight, after a
week,
> after a month, etc. It seemed like the thing had moods. I suppose it was
> badly annealed, maybe not at all. Since then I stay away from the thicker
> stuff.
>
> As far as I know the only sources for Pyrex blanks for ATMs are Newport
> Glass and Wilhelm-Bell. The latter more expensive than the former but a
> little more reliable. Both claim that they anneal the glass but there is
> plenty of evidence to the contrary.
>
> If anyone can find a reliable, inexpensive, supplier of annealed Pyrex
> blanks from 6 to 24" diameter the ATM world will beat a path to its door.
> All seven of us.
>
> Regards,
>
> Julio
>
>
>
> -----Original Message-----
> From: atm-bounces@atmlist.net [mailto:atm-bounces@atmlist.net]On Behalf Of
> atm-request@atmlist.net
> Sent: Saturday, May 21, 2005 2:07 PM
> To: atm@atmlist.net
> Subject: ATM Digest, Vol 17, Issue 22
>
> ------------------------------
>
> Message: 16
> Date: Sat, 21 May 2005 14:57:43 -0400
> From: "john sherman" <atm@mail.johnspics.com>
> Subject: [ATM] annealing
> To: <atm@atmlist.net>
> Message-ID: <200505211457.AA3063349464@mail.johnspics.com>
> Content-Type: text/plain; charset=us-ascii
>
>
> Dave,
>
> >United Lens, a large annealer of all kinds of optical blanks,
>
> My friend just bought 5 large precision-annealed blanks from them. Three
> have to be returned because of poor annealing. I have seen the photos of
> them thru full-size polarizing sheets. Even the "good" one shows Richard
> Schwartz' Satanic Cross. Is there somebody better to buy Pyrex from?
(Please
> don't say the "N" word!!!)
>
> John
>
>
>
>
>
>
>
>
>
> ------------------------------
>
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>
> End of ATM Digest, Vol 17, Issue 22
> ***********************************
>
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