Hello,
The far field results are a function of angle, and the ux, uy units can be converted to spherical coordinates using the farfieldspherical command. More information about these units is here: Understanding direction unit vector coordinates in far field projections – Ansys Optics
However, I think that what you may need instead is the farfieldexact script command: farfieldexact3d - Script command – Ansys Optics
This script command will calculate the fields on a specific plane in space with Cartesian coordinates x, y, z. So rather than convert the angular far field results to another coordinate system, it may be more straightforward to calculate the exact fields using farfieldexact3d. Will this help you to obtain the information you need?
Best,
Anna
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