Learning Forum

[brlee3014]

Hi,

How do I convert my near field data to ray sets to use as source objects in Zemax non-sequential mode? More specifically, how do we make the conversion between monitor data (or rectilinear data with E fields) into .dat format that Zemax NSM can import?

It seems like this article describes that I need to decompose it into far field projections. Once I convert my near field results into far field and figure out amplitude/phase vs angle, how do we write it to .dat format?

https://support.lumerical.com/hc/en-us/articles/360034416754-Export-EM-data-to-ray-tracers

[Guilin Sun]

Yes, you will first need to project the near field into far field using script. There are a few examples in this link https://support.lumerical.com/hc/en-us/articles/360034936793-Zemax-interoperability-overview such as nZemax Interoperability - Planar OLED examplenZemax Interoperability - Metalens examplenYou can choose the best example to read.nn

[brlee3014]

Thanks for the references. After projecting the near field into far field, how are the ray sets produced? In other words, what is the encrypted script zemax_rayset_write_v1.lsfx in the planar OLED example doing in the background that generates ray files and saves it to .dat or .txt?.If the script cannot be disclosed, a general algorithm or procedure would help. Thanks!n

[Guilin Sun]

I guess you know what is required for raytracing. The encrypted file is most likely to wrap up the farfield data as a function of angle with the magnitude. That means at each angle, the data has its own magnitude and polarization.n

[Andrew Davies]

My guess is they are taking a Fourier transform of the E field. Then taking a weighted (based on the plane wave amplitude) random sampling to generate the ray set.