Grating Optimization over Desired FOV

Diffractive gratings are often used to couple light into lightguides, and that forms the basis of the near-eye display devices for AR/MR applications. For vision purposes, the diffraction efficiency of the coupling grating must be optimized over a certain field of view (FOV). That is a challenging task. Using the rigorous Fourier modal method (FMM, also known as RCWA) in VirtualLab Fusion, and the evolutionary algorithm from optiSLang, an optimized grating structure that delivers good uniformity over the desired FOV can be obtained.

Optimization of Binary Grating for Lightguide Coupling

LightTrans

With the rigorous Fourier modal method (FMM) in VirtualLab Fusion and the evolutionary algorithm in optiSLang, we demonstrate the optimization of a binary grating for waveguide coupling for the desired field of view (FOV).

Grating Optimization in VirtualLab Using optiSLang

LightTrans

A workflow is presented for how to optimize a grating structure regarding a specified merit function using VirtualLab Fusion and the optimization software optiSLang.

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