I think what you may be looking for is a Biconic Lens:

or perhaps a Biconic Zernike Lens if you want even more control over the aspherical shape.

However, if you want to construct a lens using a surface, take a look at the Compound Lens object.

Regards,
Jeff

Oooh! Biconic Zernike gets me exactly what I need, (I need to be able to define the higher order terms that a regular biconic lens does not), thankyou!

The compound lens object will undoubtedly be useful in the future. Thank you.

A follow-up question:

Having generated my biconic Zernike lens profile, I now need to export the coefficients to include on a print. I could fairly easily copy and paste the row from the editor into Excel, then write a script to generate the text to include on the drawing. I’m sure there’s a way one could do this natively in OpticStudio through the ZPI interface also. However, I feel like this is a common enough requirement that it should be supported without writing one’s own scripts? Reminder that I need to be able to do this in non-sequential mode. Looks like there might be a tool to do this for an aspheric surface in sequential mode, but that wont help me here.

Thanks again in advance.