Re: [ATM] two mirror folded Newtonian

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

Hi Polaraligned,

Tuesday, March 7, 2006, 11:28:07 AM, you wrote:

P> The primary wavefront error is multiplied by (1/cos *  secondary
P> angle).  This results in a smaller error introduced by the secondary
P> for such a "folded" system.

That is not correct. A perfect secondary will not change any
defects to the wavefornt caused by the primary, whatever its
angle. Wavefront distaortion caused by a defective secondary
will change with the secondary angle though.

-- 

Best regards,
  Richard in the UK

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