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.

公开(公告)号：US20240219731A1

公开(公告)日：2024-07-04

申请号：US18557464

申请日：2022-05-19

Applicant: GOOGLE LLC

Inventor： Ozan Cakmakci ,  Kirill Afanasev

IPC: G02B27/01

CPC classification number: G02B27/0172 ,  G02B2027/0174 ,  G02B2027/0178 ,  G02B2207/101

Abstract: Systems, devices, and techniques provide an increased size of an eyebox presented by a wearable display device by utilizing multiple outcouplers, each including a set of multiple holographic mirrors. Light from a micro-display is polarized via a controllable polarizer that switches between s-type and p-type polarization, collimated, passed to a TIR waveguide, and directed via multiple outcouplers to an eye of a user. The outcouplers may include one or more angular bandwidth holograms that reflect light that is incident on the hologram at a specific angle or a specific range of angles.