How to Set Up a Lightguide with Real Grating Structures
Abstract
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 tutorial, 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.
VirtualLab Fusion Configuration
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VirtualLab Fusion
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AR VR MR Package
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Grating Package
Are you interested in further reading?
Tutorial
Construction of a Light Guide
Light guides with coupling gratings can be set up in VirtualLab Fusion using the Light Guide component and its flexible region definition.
Use Case
Modeling of a HoloLens 1 - Type Layout with Light Guide Component
This use case demonstrates the modeling of a device of a simple “HoloLens 1”-type layout with a Light Guide component capable of guiding light with a 32° × 18° FoV.
Tutorial
Flexible Region Definition
This tutorial walks you through the flexible configuration of regions in VirtualLab Fusion, which allow the user to define variously shapes...
Tutorial
Specification of Diffraction Orders and Efficiencies for Grating Regions
This covers the user-friendly interface to select grating orders and specify their efficiencies (either idealized or calculated rigorously) for the grating regions of a light guide.
Tutorial
Light Guide Layout Design Tool
The Layout Design tool allows to design a custom “Hololens 1”-like augmented or mixed reality system according to the desired specifications.
Tutorial
k-Domain Layout Visualization
We explain the physical concepts employed in the k-Layout Visualization tool and demonstrates its usage.
Use Case
Simulation of Lightguide with 1D-1D Pupil Expander and Real Gratings
The investigation of the influence of real gratings on the efficiency and uniformity of a lightguide are of essential importance. This use case shows an example with a slanted grating as incoupler and binary surface relief grating as EPE and outcoupler.