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公开(公告)号：US20240418986A1
公开(公告)日：2024-12-19
申请号：US18711640
申请日：2022-12-29
Applicant: SOUTHEAST UNIVERSITY
Inventor： Yishi WENG , Yuning ZHANG , Yuchen GU , Lixuan ZHAGN , Chuang WANG , Ran WEI
Abstract: A two-dimensional exit pupil expansion method for waveguide display based on polarization volume gratings (PVGs) is provided. Based on the polarized diffraction properties of the PVGs as waveguide coupling elements, a light beam from a microimage source system is introduced into and then propagates in a waveguide medium. By a composite PVG structure, a light field of a transmitted image is subjected to two-dimensional exit pupil expansion and emission, and finally incident into human eyes to achieve waveguide augmented reality imaging.
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