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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
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.
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Patent Agency Ranking
公开(公告)号：US12164106B2
公开(公告)日：2024-12-10
申请号：US17287479
申请日：2019-07-24
Applicant: Snap Inc.
Inventor： Ciaran Phelan , Sophia Antonia Fox , Mohmed Salim Valera , Arseny Alexeev
Abstract: An optical structure is disclosed for use in an augmented reality display. The structure includes a waveguide (52) and an input diffractive optical structure (54) configured to receive light from a projector and couple the received light into the waveguide (52). An output diffractive optical structure (60) is configured to receive light from the input diffractive optical element (54) in an input direction, wherein the output diffractive optical structure comprises at least a first diffractive optical element (30) and a second diffractive optical element (32) with different respective diffraction efficiencies, wherein the first diffractive optical element has a relatively high diffraction efficiency and the second diffractive optical element has a relatively low diffraction efficiency and the first and second diffractive optical elements are overlaid on one another in or on the waveguide. The output diffractive optical structure (60) comprises a first portion (62) and a second portion (64). In the first portion (62) the first diffractive optical element is configured to couple light from the input direction towards the second portion (64) and the second diffractive optical element is configured to couple light from the input direction away from the second portion. In the second portion (64) the first diffractive optical element is configured to couple light from the input direction towards the first portion (62) and the second diffractive optical element is configured to couple light from the input direction away from the first portion (62).
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公开(公告)号：US20240210704A1
公开(公告)日：2024-06-27
申请号：US18596415
申请日：2024-03-05
Applicant: Snap Inc.
Inventor： Arseny Alexeev , Sebastien De Cunsel , Sophia Fox , Choon How Gan , Ciaran Phelan , Gleb Siroki , Mohmed Salim Valera , Kai Wang
CPC classification number: G02B27/0172 , G02B27/4205 , G02B27/4272
Abstract: There is disclosed a waveguide for use in an augmented reality or virtual reality display. The waveguide comprises a plurality of optical structures in a photonic crystal. The plurality of optical structures are arranged in an array to provide at least two diffractive optical elements. Each of the two diffractive optical elements is configured to receive light from an input direction and couple it towards the other diffractive optical element which can then act as an output diffractive optical element, providing outcoupled orders towards a viewer. The plurality of optical structures respectively have a shape, when viewed in the plane of the waveguide, comprising twelve substantially straight sides, six of the sides having respective normal vectors at a first angle, and the other six of the sides having respective normal vectors at a second angle which is different to the first angle.
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公开(公告)号：US20240361605A1
公开(公告)日：2024-10-31
申请号：US18771278
申请日：2024-07-12
Applicant: Snap Inc.
Inventor： Ciaran Phelan , Sophia Antonia Fox , Mohmed Salim Valera , Arseny Alexeev
IPC: G02B27/01
CPC classification number: G02B27/0172 , G02B6/0023 , G02B6/005
Abstract: An optical structure for an augmented reality display includes a waveguide and an input diffractive optical structure to receive light from a projector and couple the received light into the waveguide. An output diffractive optical structure, comprising first and second diffractive optical elements overlaid on one another in or on the waveguide, receives light from the input diffractive optical element in an input direction. The first diffractive optical element has a high diffraction efficiency relative to the second diffractive optical element. A first portion of the first diffractive optical element couples light from the input direction towards a second portion, and the second diffractive optical element couples light from the input direction away from the second portion. The second portion couples light from the input direction towards the first portion, and the second diffractive optical element couples light from the input direction away from the first portion.
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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
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.
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公开(公告)号：US11953685B2
公开(公告)日：2024-04-09
申请号：US17439978
申请日：2020-02-03
Applicant: Snap Inc.
Inventor： Arseny Alexeev , Sebastien De Cunsel , Sophia Fox , Choon How Gan , Ciaran Phelan , Gleb Siroki , Mohmed Salim Valera , Kai Wang
CPC classification number: G02B27/0172 , G02B27/4205 , G02B27/4272
Abstract: There is disclosed a waveguide for use in an augmented reality or virtual reality display. The waveguide comprises a plurality of optical structures in a photonic crystal. The plurality of optical structures are arranged in an array to provide at least two diffractive optical elements. Each of the two diffractive optical elements is configured to receive light from an input direction and couple it towards the other diffractive optical element which can then act as an output diffractive optical element, providing outcoupled orders towards a viewer. The plurality of optical structures respectively have a shape, when viewed in the plane of the waveguide, comprising twelve substantially straight sides, six of the sides having respective normal vectors at a first angle, and the other six of the sides having respective normal vectors at a second angle which is different to the first angle.
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