View RLGO solver Rays

shan25_22144
shan25_22144 Altair Community Member
edited September 2021 in Community Q&A

I have an homogeneous isotropic dielectric lens currently modeling with RLGO solver. I would like to know if it is possible to view reflected, transmitted, wedge diffracted rays in POSTFEKO? 

 

I have attached the model cfx file for your reference.   I enabled 'Export ray file for post-processing' option in solver setting and tried to view UTD rays in postfeko, but postfeko stops responding.

 

 

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Answers

  • JIF
    JIF
    Altair Employee
    edited September 2017

    Hello shan25,

     

    I think what you are running into is a performance problem in POSTFEKO. The default in POSTFEKO is to display all the rays, but with your model having around a million rays, POSTFEKO is not able to cope. We are working on improving the performance for large numbers of rays. There is a workaround that I'll share with you.

     

    1. Before opening the model, go to the 'Preferences' dialog in POSTFEKO (under Settings)
      workaround_01.png
    2. Under the '3D Result' tab on the dialog, uncheck the 'Display ray lines' option. This disables the display of rays by default.
      workaround_02.png
    3. Create a new 3D view and add the result (rays)
    4. On the ray data panel, uncheck 'All' so that individual (or a list) of rays can be selected.
      view_all.jpg
    5. Now go to the Result tab and enable the ray lines display again.
      workaround_03.png
    6. You can now have a look at all the rays (individually or as a range of rays) by selecting the rays to look at on the ray panel.

     

    Note that you only have to do the first steps once, afterwards it will remember the settings for that installation on that machine. It does then require you to enable the ray lines display for every new result though (after unselecting 'All' on the panel).

     

    On a side note, I would recommend that you mesh the model finer (maybe at least 10 mesh edges over the diameter of the lens). Even though you are using curvilinear elements, the elements should be smaller to better approximate a lens.

  • shan25_22144
    shan25_22144 Altair Community Member
    edited September 2017

    Hallo JIF,

     

    Thanks for your reply, Now I can visualize rays.

    Does RLGO considers higher order effects such as Transmission-reflection? (i.e. transmitted at first interface, reflected at second interface and again reflected at first interface) 

    Is the radius of curvatures of front and back faces of the lens are considered when evaluating the radius of curvature of the transmitted and reflected rays?

    Can RLGO handle non homogeneous anisotropic dielectric materials? 

    Regards,

     

    Shan25

  • Johan_Huysamen
    Johan_Huysamen
    Altair Employee
    edited September 2017

    Hi shan25

     

    The RL-GO in FEKO does consider multiple interactions (transmission and reflections). The number of interactions to consider is either determined automatically by FEKO or the user can set a limit manually if required.

     

    When using curvilinear mesh elements (as you have done here), FEKO does consider the radius of curvature of the faces.

     

    The RL-GO in FEKO includes support for anisotropic layered dielectrics (2D) - available under the 'Layered structures' option under the Media in CADFEKO, but not for full 3D anisotropic dielectric structures.

     

    Regards,

    Johan h

     

  • Altair Forum User
    Altair Forum User
    Altair Employee
    edited June 2018

    can i measure the magnitude of a ray from the ray file? or where i can see the magnitude of any ray

    ? 

  • Dubba sai charannath
    Dubba sai charannath Altair Community Member
    edited September 2021
    JIF said:

    Hello shan25,

     

    I think what you are running into is a performance problem in POSTFEKO. The default in POSTFEKO is to display all the rays, but with your model having around a million rays, POSTFEKO is not able to cope. We are working on improving the performance for large numbers of rays. There is a workaround that I'll share with you.

     

    1. Before opening the model, go to the 'Preferences' dialog in POSTFEKO (under Settings)
      workaround_01.png
    2. Under the '3D Result' tab on the dialog, uncheck the 'Display ray lines' option. This disables the display of rays by default.
      workaround_02.png
    3. Create a new 3D view and add the result (rays)
    4. On the ray data panel, uncheck 'All' so that individual (or a list) of rays can be selected.
      view_all.jpg
    5. Now go to the Result tab and enable the ray lines display again.
      workaround_03.png
    6. You can now have a look at all the rays (individually or as a range of rays) by selecting the rays to look at on the ray panel.

     

    Note that you only have to do the first steps once, afterwards it will remember the settings for that installation on that machine. It does then require you to enable the ray lines display for every new result though (after unselecting 'All' on the panel).

     

    On a side note, I would recommend that you mesh the model finer (maybe at least 10 mesh edges over the diameter of the lens). Even though you are using curvilinear elements, the elements should be smaller to better approximate a lens.

    Hello JIF, Iam new to the FEKO and as well as on the predicting the RCS. I have a formation of three wings and I have applied PO- full ray tracing. But I havent been able to trace the rays. Can you please help me on this

  • Mel
    Mel Altair Community Member
    edited September 2021
    Dubba sai charannath said:

    Hello JIF, Iam new to the FEKO and as well as on the predicting the RCS. I have a formation of three wings and I have applied PO- full ray tracing. But I havent been able to trace the rays. Can you please help me on this

    A very similar question was answered in this thread.

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