公开(公告)号：US12204112B2

公开(公告)日：2025-01-21

申请号：US18563733

申请日：2022-06-06

Applicant: Snap Inc.

Inventor： Alexandra Crai ,  Ciaran Phelan ,  Mohmed Salim Ibrahim Valera ,  David Nicholas Crosby

IPC: G02B27/01 ,  G02B5/18 ,  G02B27/00 ,  G06T19/00

Abstract: A waveguide for use in a virtual reality, VR, or augmented reality, AR, device, is disclosed. The waveguide comprising an input region configured to couple light into the waveguide so that it propagates under total internal reflection (TIR) within the waveguide, and an output region comprising optical structures configured to receive image bearing light from the input region. The output region comprises a plurality of zones having different diffraction to each other, the plurality of zones comprising diffraction efficiencies so as to reduce rainbow artefacts.

公开(公告)号：US20250035929A1

公开(公告)日：2025-01-30

申请号：US18716025

申请日：2022-12-05

Applicant: Snap Inc.

Inventor： Alexandra Crai ,  Ciaran Padraic Phelan ,  Christian William Olavi Sol ,  David Louis Maxime Poussin ,  Mohmed Salim Valera ,  Kai Wang ,  Alison Laura Smith ,  Simeng Jia

IPC: G02B27/01

Abstract: An optical assembly is disclosed in which two input pupils of light are projected onto an input grating. The input pupils can be overlapping or non-overlapping. The input grating is configured to receive the input pupils and to diffract them so that they are coupled towards an output element in parallel directions that are laterally separated from one another. The input pupils can be received respectively at a first portion and a second portion of an output element, on either side of a dividing line. The input pupils are received at positions that are symmetrically displaced from the dividing line. The first portion and the second portion are mirror-images of one another, and each can expand light from respective input pupils in an equal and opposite way.

公开(公告)号：US20250102808A1

公开(公告)日：2025-03-27

申请号：US18976111

申请日：2024-12-10

Applicant: Snap Inc.

Inventor： Alexandra Crai ,  Claran Phelan ,  ohmed Salim Ibrahim Valera ,  David Nicholas Crosby

IPC: G02B27/01 ,  G02B5/18 ,  G02B27/00 ,  G06T19/00

Abstract: A waveguide for use in a virtual reality, VR, or augmented reality, AR, device, is disclosed. The waveguide comprising an input region configured to couple light into the waveguide so that it propagates under total internal reflection (TIR) within the waveguide, and an output region comprising optical structures configured to receive image bearing light from the input region. The output region comprises a plurality of zones having different diffraction to each other, the plurality of zones comprising diffraction efficiencies so as to reduce rainbow artefacts.

公开(公告)号：US20240411067A1

公开(公告)日：2024-12-12

申请号：US18697978

申请日：2022-12-08

Applicant: Snap Inc.

Inventor： Alexandra Crai ,  Ciaran Padraic Phelan

IPC: G02B5/18 ,  G02B27/00 ,  G02B27/01

Abstract: A diffraction grating for use as an output element of a diffractive waveguide combiner for an augmented reality or virtual reality display. First and second periodic arrays of optical structures are arranged on a plane according to a common unit cell which is oblique, first and second periods, respectively, of the diffraction grating being defined by a spacing between neighbouring optical structures of one of the first and second periodic arrays along a first side and second side, respectively, of the common unit cell. The first periodic array of optical structures is overlaid on the second periodic array of optical structures in the plane such that the arrays are spatially offset from one another on the plane.

公开(公告)号：US20240264444A1

公开(公告)日：2024-08-08

申请号：US18563733

申请日：2022-06-06

Applicant: Snap Inc.

Inventor： Alexandra Crai ,  Ciaran Phelan ,  Mohmed Salim Ibrahim Valera ,  David Nicholas Crosby

IPC: G02B27/01 ,  G02B5/18 ,  G02B27/00 ,  G06T19/00

CPC classification number: G02B27/0172 ,  G02B5/1819 ,  G02B27/0037 ,  G06T19/006

Abstract: A waveguide for use in a virtual reality, VR, or augmented reality, AR, device, is disclosed. The waveguide comprising an input region configured to couple light into the waveguide so that it propagates under total internal reflection (TIR) within the waveguide, and an output region comprising optical structures configured to receive image bearing light from the input region. The output region comprises a plurality of zones having different diffraction to each other, the plurality of zones comprising diffraction efficiencies so as to reduce rainbow artefacts.