Re: spherical aberration as a function of conjugate ratio


<david_a119@xxxxxxxxx> wrote in message
news:1145415258.672439.265560@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
Suppose I have a really good camera lens or microscope objective that
gives diffraction-limited performance if I use it at the conjugate
ratio that it's designed for. If I know the prescription for the lens,
I can use Zemax or Oslo to calculate the amount of spherical aberration
that I'll get if I use the lens at some other conjugate ratio. But
there's no way I can get the prescription from Nikon or Zeiss. <snip>

You can get some good representative prescriptions from published patents
from the free version of Lensview (the lens design patent database), which
also exports OSLO format files suitable for the free (EDU) version of OSLO.
Both are available from Lambda Research. Just make sure the image surface
number is <10. Or you can design your own, using the OPIC merit function
generator CCL (download from the Lambda Research Knowledge Base, complete
with full instructions) which runs on OSLO EDU.

Brian


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