Title:
IN-COUPLING GRATING STRUCTURE, DIFFRACTION OPTICAL WAVEGUIDE, AND AUGMENTED REALITY DEVICE
Document Type and Number:
WIPO Patent Application WO/2024/093642
Kind Code:
A1
Abstract:
An in-coupling grating structure (1), a diffraction optical waveguide (3), and an augmented reality device. The in-coupling grating structure (1) is configured to couple an image light beam into a waveguide substrate (3); grating parameters of different parts of the in-coupling grating structure (1) are different; and the different parts are distributed along the surface of the waveguide substrate or along a grating depth direction. The in-coupling grating structure (1) has good diffraction efficiency, a wide FOV bandwidth, and good FOV uniformity.
Inventors:
ZHANG YAQIN (CN)
LOU XINYE (CN)
LOU XINYE (CN)
Application Number:
PCT/CN2023/124353
Publication Date:
May 10, 2024
Filing Date:
October 12, 2023
Export Citation:
Assignee:
SHANGHAI NORTH OCEAN TECH CO LTD (CN)
International Classes:
G02B6/124; G02B27/00
Foreign References:
| CN219370044U | 2023-07-18 | |||
| CN219162419U | 2023-06-09 | |||
| CN112068233A | 2020-12-11 | |||
| CN111175881A | 2020-05-19 | |||
| CN114371528A | 2022-04-19 | |||
| CN215494216U | 2022-01-11 | |||
| CN115016057A | 2022-09-06 | |||
| CN110914724A | 2020-03-24 |
Attorney, Agent or Firm:
SHANGHAI HUIHAN INTELLECTUAL PROPERTY LAW FIRM (CN)
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