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Simulation of Waveguide with a Complex 2D Exit Pupil Expansion


Two-dimensional (2D) exit pupil expansion, as a key technology for near-to-eye display, can be realized by using diffractive gratings. Together with the in- and outcoupling gratings, it makes a complex 2D layout on both sides of the waveguide. As an example, a 2D exit pupil expander, which consist of both idealized and real gratings, is constructed and modeled. Uniformity at the exit plane of the waveguide is shown, and the PSF and MTF at the imaging plane are also evaluated.

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