When exporting a model to the STEP file format, while you can name the STEP file any way you like, you cannot change the names of the individual surfaces / ray parts.

When I then attempt to use the results from (x2) different optical models in SolidWorks, I experience a naming conflict.  For example, the rays are incorporated into a part called “rays.sldprt”.  The lenses are “surfaces 2,3.sldprt”.

With this fixed naming convention it is easy to have two completely different models have the exact same part names.  The only work around is to manually rename each part file.

Please add a feature such that users can attach a unique name to the individual part files and/or add the name of the model as a prefix / suffix.
Thanks!