Gratings are some of the fundamental optical components used in many different modern applications and technologies. These components can sometimes be modeled with sufficient accuracy by functional approaches. However, for a thorough study of the effects that a grating introduces into an optical system, a modeling strategy that takes into account the actual structure is required.
VirtualLab Fusion offers a broad range of different specialized solvers for this task, ranging from approximate but fast methods like the Thin Element Approximation (TEA), to rigorous approaches like the Fourier Modal Method (FMM)/Rigorous Coupled-Wave Analysis (RCWA).
In this week's newsletter we showcase two examples that illustrate these solvers in action, playing their role in examples taken from various fields of application.
Modeling the Effects introduced by the Real Structure of a Diffractive Lens in a Hybrid Eyepiece
A hybrid eyepiece with a real diffractive lens surface is imported from Zemax OpticStudio® and analyzed further in VirtualLab Fusion, notably including the modeling of different quantization schemes.
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.
