Re: [ATM] annealing

[Mike Lockwood <melockwo@uiuc.edu>]

John,

john sherman wrote:
>> 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!!!)

Interesting.  Are they going to re-anneal?

> David Harbour wrote:
>> (P. S. -He is not an annealer; United does not sell to the public)

Dave, actually, yes they do.  They have sold to me several times.  I 
set up an accountover the phone.  I can't remember if there's a 
minimum order.

I've bought lots of smaller (10" and under) molded blanks from United 
and their anneal has been very good (no stress noted with crossed 
polarizers).  Delivery was fast, too.  Their prices for molded blanks 
are very good under 10".  I think Willmann-Bell buys their blanks and 
then marks them up.

I have a 16" Pyrex blank from United Lens - I'll check it's anneal 
when I get a chance.

	Mike Lockwood

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