Thank you so much for your helpful reply. I did not use any script commands; I just calculated the far fields from GUI with default settings (so a semicircle of 1 m diameter is located underneath the monitor). It was weired for me that refraction at a smooth curved surface, rather than diffraction generated such interference fringes.
And I also noticed that when there is no gap between the sphere and the periodic boundary condition (PBC being in contact with the sphere), the fringes were significantly suppressed and I obtained a very smooth angular profile (image attached). This result agrees with my intuition as the optics does not contain diffraction, so why did I obtain the fringes when there is a gap? Possibly the small gap at PBC worked as an opening that causes diffraction? Or is it due to far field artifacts or PBC?
Please Login to Report Topic
Please Login to Share Feed
New Post - Reply To: Illumination on curved surface generates fringe pattern in far fields
You are navigating away from the AIS Discovery experience