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22 November 2024 Diffractive waveguides of prohibited light leakage based on surface relief gratings for augmented reality display
Yangxi Chen, Weina Liu, Xiaoyi Liu, Xiaohui Zou, Jing Wang
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Proceedings Volume 13239, Optoelectronic Imaging and Multimedia Technology XI; 132390C (2024) https://doi.org/10.1117/12.3035747
Event: SPIE/COS Photonics Asia, 2024, Nantong, Jiangsu, China
Abstract
Two issues that hindering fast developments of diffractive waveguides based on surface relief grating (SRG) for augmented reality (AR) applications: light leakage at out-coupler and low light efficiency. A layer of subwavelength metal wire grid on commonly used protective glass sheet above diffractive waveguide was designed to prohibit the light leakage and reflect them back to AR waveguide for recycling light usage. One-dimensional (1D) SRG based AR waveguide was analyzed under TE-polarized illumination at 532nm wavelength with 30° field-of-view (FOV). It was demonstrated that 80% efficiency improvement and 9% intensity uniformity increasement could be obtained with completely prohibited light leakage by nanostructures glass cover, compared with that on planar protective glass.
(2024) Published by SPIE. Downloading of the abstract is permitted for personal use only.
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Yangxi Chen, Weina Liu, Xiaoyi Liu, Xiaohui Zou, and Jing Wang "Diffractive waveguides of prohibited light leakage based on surface relief gratings for augmented reality display", Proc. SPIE 13239, Optoelectronic Imaging and Multimedia Technology XI, 132390C (22 November 2024); https://doi.org/10.1117/12.3035747
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KEYWORDS
Waveguides
Augmented reality
Optical gratings
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