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Question

CAD file to user defined surface

  • February 10, 2026
  • 0 replies
  • 4 views

oenthus01
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Hi friends,

I don’t have part designer, so I always struggle to get a CAD file to a User defined surface. Looking at all the posts closest I see is the link below, but the author never posted the .csv file or the CAD so I can’t test the code since step1 and step2 didn’t work out for me. Wondering if anyone else had the same issues and if someone figured out a way to convert a CAD file to a closed loop freeform or a aspheric surface?

Converting CAD data of the TIR lens into the parametric surface for optimization in NSQ mode | Zemax Community