Optics

Optics

Topics related to Speos.

How to make the imported FDTD metalens appear as rays in Zemax

    • suhee
      Subscriber

      I designed a metalens in Lumerical FDTD and imported it into Zemax's POP by saving the zbf file from the DFT monitor. This metalens focuses well to a single point, but the rays are not visible in the Zemax 3D viewer. I wonder how to make the imported metalens appear as rays in Zemax without any additional optics.

       

       I want a screen like the picture below

    • Niki Papachristou
      Ansys Employee

      Hi Suhee,

      Thank you for reaching out to us and posting your question here. I believe that the reason of your rays on the 3D layout to be clipped is the fact that you have a fixed Clear semi-diameter on the image plane. One way to correct it is to leave it on Automatic:

      I believe the image above was created with Shaded model set up tool:

       

      Kind Regards,

      Niki

       

    • suhee
      Subscriber

      Thank you for your answer.
      The zbf file I imported should be focused like a lens. I can see that it is focused in the 'POP' image, but not in the 'shaded model' image. 

      I want to see the ray of the zbf file I imported as a 'shaded model' image.


      Please let me know. Thank you.

    • Niki Papachristou
      Ansys Employee

      Hi Suhee,

      Thank you for the additional question here. There are several reasons that you dont see the same results on ray optics compared to POP. A common reason is that the the beam parameters that you are using on ray optics compared to POP are different, I would higly recommend to go through these tutorials to familiarise yourself with the parameters imported within ray optics and POP propagation tools:

      Using Physical Optics Propagation (POP), Part 1: Inspecting the beams

      Modeling Laser Beam Propagation in OpticStudio

      Also note that ray optics and POP are two different tools and it is expected to have descrepancies, understanding the POP algorith Assumptions will help you understand these descrepancies. These can be found in our help file document:

      under:

      The Analyze Tab (sequential ui mode) » Laser and Fibers Group » About Physical Optics Propagation

      The Analyze Tab (sequential ui mode) » Laser and Fibers Group » About Physical Optics Propagation » Algorithm Assumptions

      I hope that was helpful,

      Kind Regars,

      Niki

       

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