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Re: ATM Astigmatism on 20 inch thin mirror

To: "ATM shore" <atm@shore.net>
Subject: Re: ATM Astigmatism on 20 inch thin mirror
From: "Mel Bartels" <mbartels@efn.org>
Date: Thu, 26 Dec 2002 18:21:16 -0800
References: <F32Nf4086xBwjRitkfx000033c0@hotmail.com> <001b01c2ac65$8624d3b0$6e1613d8@Dell> <005201c2aceb$e2f51600$87331dc3@andrej>
Reply-To: "Mel Bartels" <mbartels@efn.org>
Sender: owner-atm@shore.net


>>>
>. If the mirror is supported WITHOUT FLEXURE, and you
>are rotating both the mirror and the tool, as you get rid of the TDE the
astigmatism should clear up.

(This is curiously enough written by "mother of all flexing"  our Bill.)
<<<

I never try to support a mirror without flexure.  Instead I aim for a
support such that high and low spots are averaged as the mirror is rotated
every few minutes.  The worst that can happen in my situation are zonal
issues.  These can be smoothed out with differently shaped laps.

Mel Bartels

Follow-Ups:
- Re: ATM Astigmatism on 20 inch thin mirror
  - From: "Bill Kelley" <flex@commspeed.net>

References:
- ATM Astigmatism on 20 inch thin mirror
  - From: "David Lonard" <lonard@hotmail.com>
- Re: ATM Astigmatism on 20 inch thin mirror
  - From: "Bill Kelley" <flex@commspeed.net>
- Re: ATM Astigmatism on 20 inch thin mirror
  - From: "Vladimir Galogaza" <vladimir.galogaza@zg.tel.hr>

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