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[ATM] 6-points cell voor 20 inch mirror?

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Subject: [ATM] 6-points cell voor 20 inch mirror?
From: "Jan van Gastel" <jhm.vangastel@wanadoo.nl>
Date: Sun, 11 Sep 2005 09:07:47 +0200
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According to PLOP a 6-points cell for a 20 inch diameter 2 inch thickness
Pyrex mirror deforms 1/141 lambda RMS. That's a bit less then the 1/128
lambda limit given by Lewis. I don't know of anyone actually using a
6-points cell for a 20 incher, though they are very easy to make. Is PLOP to
optimistic?

Jan
http://home.wanadoo.nl/jhm.vangastel/Astronomy/

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- Re: [ATM] 6-points cell voor 20 inch mirror?
  - From: Mark Holm <mdholm@telerama.com>
- Re: [ATM] 6-points cell voor 20 inch mirror?
  - From: "Mel Bartels" <mbartels@bbastrodesigns.com>

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