公开(公告)号：US20240142704A1

公开(公告)日：2024-05-02

申请号：US18496257

申请日：2023-10-27

Applicant: GOOGLE LLC

Inventor： Daniel Adema ,  Timothy Paul Bodiya ,  Rhys Anderson

IPC: G02B6/26 ,  G02B27/01

CPC classification number: G02B6/262 ,  G02B27/0172 ,  G02B1/18

Abstract: A lightguide formed from a single substrate includes a substrate and a plurality of reflective structures disposed on the substrate. These reflective structures form one or more incouplers, exit pupil expanders, and outcouplers of the lightguide and are each configured to reflect light representative of an image. The lightguide also includes an effectively transparent overmold material disposed over the reflective structures that, together with at least a portion of the substrate, forms a first surface of the substrate. Further, the lightguide includes a second surface formed by removing at least a portion of the substrate via a material removal operation.

公开(公告)号：US20240118478A1

公开(公告)日：2024-04-11

申请号：US17963816

申请日：2022-10-11

Applicant: GOOGLE LLC

Inventor： Jamie Elizabeth Kowalski ,  Shreyas Potnis ,  Rhys Anderson ,  Kirill Afanasev ,  Eliezer Glik ,  Timothy Paul Bodiya ,  Victor Isbrucker

IPC: F21V8/00 ,  G02B27/01

CPC classification number: G02B6/0055 ,  G02B27/0172 ,  G02B2027/0123 ,  G02B2027/0174 ,  G02B2027/0178

Abstract: A waveguide including first and second sections has a first molded optic material forming a portion of the geometry of one or more Bragg gratings disposed on one surface of the first section of the waveguide. Similarly, a second molded optic material forming another portion of the geometry of one or more Bragg gratings is disposed on one surface of the second section of the waveguide. Further, a photopolymer material is deposited on the first molded optic material. As the first and second sections are coupled, a waveguide is formed with a layer of photopolymer material disposed in the waveguide with the layer of photopolymer material having a geometry defined by the first and second molded optic materials. Bragg grating holograms are then recorded in the layer of photopolymer material, resulting in a waveguide with a plurality of Bragg gratings.