Hi,

I am having issues with the resulting CAD model of my optical design. I have created a generic example below to reproduce my problem. 

I use the below parameters. (using software V20.3)

The full design is below, 3 lenses and 2 prisms, including some negative distances/thicknesses as I am changing the coordinates with the mirrors. 

However, when opening the CAD model , there are errors:

• The “negative” surfaces don’t show (no lens in the middle and one surface of each prism missing). How can I fix this?

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• Furthermore, in “part” mode in Creo, all the lenses are squashed together in a single place (and still no negative ones). How can I fix this? 

I can share the Zemax file if you need, but I dont think I am doing something too complicated? Can the CAD not deal with coordinate breaks? 

Thanks for your help,

Regards.

Audrey.