公开(公告)号：US20240329311A1

公开(公告)日：2024-10-03

申请号：US18617623

申请日：2024-03-26

Applicant: Beijing Zitiao Network Technology Co., Ltd. ,  LEMON INC.

Inventor： Wen XIONG ,  Peng ZHANG ,  Wei TAN ,  Hao TANG

IPC: G02B6/136 ,  G02B6/124

CPC classification number: G02B6/136 ,  G02B6/124

Abstract: The embodiments of the present disclosure provide a method for manufacturing an optical waveguide and an optical waveguide, the method for manufacturing includes: providing a substrate; forming a first thin film layer, a second thin film layer and a sacrificial layer on the substrate in a stacked manner, a refractive index of the first thin film layer is larger than 2; exposing and developing the sacrificial layer so that the sacrificial layer forms a first mask layer; etching the second thin film layer by taking the first mask layer as mask so that the second thin film layer forms a second mask layer; removing the first mask layer, and etching the first thin film layer by taking the second mask layer as mask so that the first thin film layer forms a grating layer; and removing the second mask layer to form the optical waveguide comprising the grating layer and the substrate.

公开(公告)号：US20240377569A1

公开(公告)日：2024-11-14

申请号：US18658564

申请日：2024-05-08

Applicant: Beijing Zitiao Network Technology Co., Ltd.

Inventor： Wei TAN ,  Wen XIONG ,  Hao TANG ,  Xiaokai LI

IPC: F21V8/00 ,  G02B27/01 ,  G02B27/44

Abstract: The present invention provides a diffractive optical waveguide and a preparation method thereof, and an augmented reality display device. The diffractive optical waveguide includes: a total reflection layer, wherein the total reflection layer includes a first light propagation layer and a second light propagation layer, which are disposed in a stacked manner, a refractive index of the second light propagation layer is less than a refractive index of the first light propagation layer, and the second light propagation layer is deposited on one surface of the first light propagation layer via a deposition method; and a coupling-in grating and a coupling-out grating, wherein the coupling-in grating and the coupling-out grating are disposed at intervals on a side of the first light propagation layer that faces away from the second light propagation layer.