How to Set Up a Lightguide with Real Grating Structures

VirtualLab Fusion enables the modeling of complex lightguide configurations in the field of AR&MR devices by utilizing the Light Guide component. Local grating areas (so-called regions) can be defined on the surfaces of the lightguide for coupling and pupil expansion purposes. The effect of the grating on the field can be modeled either rigorously or with a functional idealization that requires the user to manually enter the values of the efficiencies of the different orders. In this use case, we focus on how to import a previously designed real grating structure into the lightguide component and discuss all relevant settings and the pre-calculation of lookup tables.