• Journal of Applied Optics
  • Vol. 45, Issue 4, 849 (2024)
Huiyang XIE1、2, Da MU1、2、3、*, Yue ZHANG1、2, Tangyue LI1、2、3, and Pengyu XIA1、2
Author Affiliations
  • 1Key Laboratory of Optoelectronic Measurement and Control and Optical Information Transmission Technology (Ministry of Education), Changchun University of Science and Technology, Changchun 130022, China
  • 2School of Optoelectronic Engineering, Changchun University of Science and Technology, Changchun 130022, China
  • 3Zhongshan Research Institute, Changchun University of Science and Technology, Zhongshan 528400, China
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    DOI: 10.5768/JAO202445.0405001 Cite this Article
    Huiyang XIE, Da MU, Yue ZHANG, Tangyue LI, Pengyu XIA. Design of surface relief grating elements for augmented reality display devices[J]. Journal of Applied Optics, 2024, 45(4): 849 Copy Citation Text show less

    Abstract

    Augmented reality (AR) system is a display system that superimposes virtual images on the real environment. Since the optical waveguide can realize miniaturization and light weight, it is the core component of the AR display system. The diffraction efficiency of the optical waveguide coupling element greatly affects the imaging quality of the AR display system. In order to improve the diffraction efficiency of the coupling element in the AR display system, a waveguide structure with multi-layer superimposed gratings was proposed. Based on the vector diffraction theory, the grating was simulated and analyzed by using the rigorous coupled wave analysis method. Simulation results show that the average diffraction efficiency of a single-layer inclined grating reaches 60% at a field of view of 50°, and the average diffraction efficiency of a waveguide structure with three layers of superimposed gratings reaches more than 85%, which is 25% higher than that of a single-layer grating. The analysis results show that the waveguide structure with multi-layer superimposed gratings can achieve a larger field of view and diffraction efficiency, so that the AR display system has a clearer viewing field.
    Huiyang XIE, Da MU, Yue ZHANG, Tangyue LI, Pengyu XIA. Design of surface relief grating elements for augmented reality display devices[J]. Journal of Applied Optics, 2024, 45(4): 849
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