Re: [ATM] Ross null test - would this surplus shed lens work?

[Richard <cnc@cncservo.co.uk>]

Hi Mark,

Tuesday, September 26, 2006, 6:39:53 AM, you wrote:

MC> Do what Ric recommends re. the FL - it's a little long
MC> for the size...maybe.  As to the material, there's no
MC> problem with fused silica - just use the proper
MC> refractive index in the position calculation.  And
MC> post your results, it sounds like that could be a
MC> really nice lens for a Ross Null setup...

Agreed, but I'd put much more emphasis on "precision" than on
"Fused Silica". If you check the part numbers given for several
of those Precision lenses at the manufacturers web site you'll
see the manufacture does not describe a lot of them as
precision.

-- 

Best regards,
  Richard in the UK

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