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P‐3.2: Design of waveguide system using one dimension slant grating and two dimension grating
Author(s) -
Guo Xiaoming,
Huang Hao,
Song Qiang,
Ma Guobin,
Xu Hengshen,
HU Yueqiang,
Duan HuiGao
Publication year - 2021
Publication title -
sid symposium digest of technical papers
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.351
H-Index - 44
eISSN - 2168-0159
pISSN - 0097-966X
DOI - 10.1002/sdtp.14528
Subject(s) - grating , optics , holographic grating , blazed grating , waveguide , dimension (graph theory) , holography , diffraction grating , ultrasonic grating , critical dimension , physics , materials science , mathematics , pure mathematics
In recent years, augmented reality(AR) technology has gained much attention due to its disruptive and revolutionary nature. Thanks to the advanced nano‐imprint lithographic technique, diffractive waveguide based display becomes research hotspot. There are three main types of diffractive waveguide including one dimension grating, two dimension grating, and volume holography. In this paper, we proposed that one dimension slant grating is used as in‐coupling grating, and two dimension grating is used as outcoupling grating, so the ratio of out‐coupling grating area could be larger. We analyze the diffractive orders of out‐coupling grating in K domain. In waveguide, uniformity of field of view and moving eyebox (MEB) is critical to image quality. In this work, a multi‐objective particle swarm algorithm is conducted to optimize slant grating for better uniformity of MEB and field of view(FOV). In addition, We also proposed a symmetrical and radiate partitions of out‐coupling grating for better uniformity of MEB. The waveguide design was verified using VirtualLab Fusion In the last, polarization state of the waveguide system are analyzed.