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# Cylindrical Lens

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Can I model and optimise a sequential cylindrical surface somehow? Or is it just a non-sequential option as they are obviously not rotationally symmetric.

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Best answer by David.Nguyen 2 August 2021, 17:21

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Hi Richard,

Yes you can, have a look at the Biconic surface for example. Its Radius is the radius along Y, and its first parameter is X Radius. Therefore, you can independently change each radii. They can also be both made variable, and used during optimization. You will not be able to use the Cross-Section layout, but you can use the 3D Viewer, or Shaded Model instead.

Let me know if that makes sense, or if you need an example.

Take care,

David

Ah! Thanks David, I’ll take a look. That does sound familiar but its been so long since I’ve used a cylindrical surface, I just couldn’t remember the name. The helpfile was pretty useless too.

cheers

Richard

You can use Toroidaloption to set cylinder surface too