A comprehensive approach to diffractive waveguide optimization in mixed reality near-eye displays

This study presents a comprehensive approach to optimizing diffractive waveguides for mixed reality near-eye displays by employing a hybrid method that integrates rigorous coupled wave analysis (RCWA) and Monte Carlo (MC) ray tracing. The primary objective is to enhance the performance of these waveguides by improving field of view (FoV), exit pupil size, and image uniformity. A bidirectional scattering distribution function (BSDF) is used as a bridge to facilitate communication between RCWA and MC ray tracing, enabling efficient simulation of various design parameters such as geometric dimensions and light sources. The results demonstrate a potential contribution to improving imaging efficiency, uniformity, and reduction of backward light leakage by simulation. Future work will focus on applying this method to designing mixed reality (MR) glasses to optimize exit pupil expansion (EPE), enhance FoV, and reduce crosstalk effects.