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Ansys Learning Forum › Forums › Discuss Simulation › Optics › RMS spot size interpretation › Reply To: RMS spot size interpretation

November 11, 2024 at 8:56 pm
Ethan Keeler
Ansys Employee

Hi Jurgen,

Just to clarify, the Merit Function as you've have set is giving you the extent of the transverse ray aberration for X and Y simultaneously, and in practive will typically represent the worst offender (larger aberration in X or in Y). In order to see a computation of the actual RMS spot radius, you should set the weight of X and Y to 0 in the Merit Function Wizzard:

You can find more information on what is being calculated here: Optimization Function Criteria.

Thanks,
Ethan