Re: ATM BVC Weirdness part II

["samorawski" <samorawski@3web.net>]

The suggestion ( below ) by Dave Rowe, if followed by ATM's would probably
result in many more high quality mirrors being figured or a least figured
with a lot less aggravation.

A 4.25"  f5  5/8" thick Pyrex mirror I figured a few years ago showed
readings that were absolutely excellent after this mirror sat for 45
minutes. After a 3 hour snooze I retested it and found it to be almost
spherical.
Since then all my final Focault testing is done after the mirror sits over
night on a test stand with the mask on.
Clear Skies
Sam Orawski
Hamilton Ont.


----- Original Message -----
From: <Aplanatic@aol.com>
To: <atm@shore.net>
Sent: Sunday, August 19, 2001 7:45 PM
Subject: Re: ATM BVC Weirdness part II


> Even with Pyrex it's a good idea to let the mirror sit on the test stand
for three hours (or best, overnight)before making that final determination
of the quality of its figure.


Dave Rowe