Hello,I would like to model the propagation of a polarized light beam through a biaxial crystal.While methods for uniaxial crystals seem to be well established, I am unsure how to approach this problem for biaxial crystals.How do I handle this case?Thank you very much for your help.Best regards,Dirk

Dear all, I updated this morning to Zemax 2026 R1.01. Since then I get the following error message when trying to connect to Zemax with Python via API (e.g. by using the PythonStandAlone_01.py file):“InitializationException: Unable to locate Zemax OpticStudio.  Try using a hard-coded path.” Did anything change here? Thank you and best regards, Gregor

From this KB it is clear that we can pivot an element about any arbitrary pivot point in space. This is Ok for intermediary optical elements in the optical chain but breaks when you want to pivot either the Object of Image surface.Here is a an example showing a simple Optic Fiber with Chief ray centered on to Image surface. How can I pivot Surfaces 1→3 about the Pivot point centered on the Image surface?  

Hi,I would like to have your assistance.I got a design with a Blackbox. I want to export a STEP file with solid beam.I manage to create STEP file with all the our options (XY fan, grid, ring, etc.) but the solid beam. When I export with solid beam, the export fails.Do you know how to solve this issue?