Re: [ATM] Suggestions for a "focus screen" for an optical testbench.

["Thomas Janstrom" <tomjan@ozemail.com.au>]

Hi Richard,

The thing with CeO2 is that it's much softer than glass so it doesn't
actually grind the glass like a harder "abrasive" will. For that matter
no-one is *really* sure how polishing takes place anyway, there are many
theories, but as you can't see it happening at the near molecular level
you can't really prove one or another.

Clear Skies, Thomas.
www.tjanstrom.com
www.norsewines.com.au 

-----Original Message-----
From: atm-bounces@atmlist.net [mailto:atm-bounces@atmlist.net] On Behalf
Of Richard
Sent: Monday, 24 October 2005 8:19 AM
To: Bob May
Subject: Re: [ATM] Suggestions for a "focus screen" for an optical
testbench.

Hi Bob,

Sunday, October 23, 2005, 8:29:21 PM, you wrote:

BM> Maybe somebody has some 1
BM> micron or finer grit and can do a much finer ground glass screen.

Isn't that more likely to polish it?. Most CeO2 is coarser than
than 1um.

-- 

Best regards,
  Richard in the UK

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