Waveguide AR system optimization with 2D surface relief grating

Waveguide AR glasses with gratings can reduce the size and weight of augmented reality products. Typically, the optical system includes both geometric optic and wave optic components; therefore, a multi-domain solution is needed for designing and optimizing the system. Furthermore, achieving sufficient uniformity, chromaticity, and efficiency while maintaining desired field of view is also a challenge. The key for waveguided AR design is the feasible design flow and comprehensive simulation as well as optimization tools that can handle multi-domain, multi-target problems. We successfully integrated wave optics phenomenon into geometrical optics results to complete an optimized waveguide AR glasses design by using Synopsys RSoft RCWA tool DiffractMOD, and LightTools Spatial BSDF interface.