Optical

Optical

Resolution of polar plots generated with BSDF Script/Analysis Object?

    • mpalei
      Subscriber

      Hi,

      I've been trying to generate BSDF's for various surfaces using the method detailed here: 

      https://optics.ansys.com/hc/en-us/articles/360042213854-Bidirectional-scattering-distribution-function-BSDF-

      I just had a question about the resolution of the polar plots generated using the script given on the page above. Using my own surfaces I see the angular distribution polar plots that look much more coarse in resolution (attached below) than that of the page itself, and that the reflected and transmitted plots have different resolutions as well. I was wondering if there's something in particular that affects what the resolution of these plots ends up as? From what I can tell in the script in the BSDF analysis object it uses a variety of different functions to calculate the far field projections but it's not super clear to me what causes this disparity.

    • Guilin Sun
      Ansys Employee

      I guess you are suing periodicBC+plane wave and using gracting analysis? or using Gaussian+PML with farfiled3d?

      When log scale is used for grating analysis, it is not the "coarse" issue but the grating orders. The more orders the rough surface can produce the smoother the result.

       

      You  may refer this post to get info regarding to the two different methods: https://forum.ansys.com/forums/topic/difference-between-gratingpolar-and-farfieldpolar-function/

       

       

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