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Re[2]: [ATM] convex secondary

To: Jonathan Lavoie <atm@atmlist.net>
Subject: Re[2]: [ATM] convex secondary
From: Richard <cnc@cncservo.co.uk>
Date: Thu, 3 Mar 2005 13:06:16 +0000
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Reply-To: Richard <cnc@cncservo.co.uk>
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Hi Jonathan,

Sunday, February 27, 2005, 8:50:11 PM, you wrote:

JL> But for this test we must use optical glass for the 4" secondary. How
JL> expensive is this kind of blank?

A 6" diameter matt blank of 1" thick BK7 is costing me just over
$100 in the UK. Given that part of the cost is for the labour of
cutting it, I would guess a 4" diameter by 1" thick blank is
going to be around $60.

-- 
Best regards,
 Richard                            mailto:cnc@cncservo.co.uk

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References:
- Re: [ATM] convex secondary
  - From: Jonathan Lavoie <atm@lavoielactee.net>

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