Seamless Transition to Geometrical Optics Concepts in a Fully Physical Optics Framework​

VirtualLab Fusion is a software developed for multiscale optical simulations and design. 

It offers a platform that interconnects different simulation models, such as precise Maxwell solvers, like Fourier Modal Method (FMM), and more approximate methods, including geometrical optics.

The ability for various simulation models to work together requires that all methods utilize electromagnetic fields as both input and output.
Therefore, integrating geometrical optics into multiscale simulation framework necessitates developing a formulation of geometrical optics for electromagnetic fields.

This document examines the theory, which is also applied within VirtualLab Fusion.

The document originates from a presentation delivered by Frank Wyrowski at SPIE Europe in April 2024.