Hi all,

I have a question related to physical optics propagation. I am reading zemax manual on physical optics propagation where they mention that they use gemoetric rays to propagate field from one plane to another as mentioned in manual:

"This set of rays, called the probing rays, is then traced through the optical surface using conventional geometric optics. The path length of each ray, and the positional and angular

aberrations generated, are then used to reconstruct the pilot beam and complex amplitude after the surface. The probing ray set is used to generate the transfer through the surface."

I need more context on exact implementation and looking for papers or reference material on this issue. so far I came across STABLE AGGREGATE OF FLEXIBLE ELEMENTS (SAFE) by Forbes and Alonso. Looking for further reference or implementation material.

Thank you.

Best regards,

Imaad.