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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：US20240411140A1
公开(公告)日：2024-12-12
申请号：US18811342
申请日：2024-08-21
Applicant: Snap Inc.
Inventor： Mohamed Salim Valera , Sebastien De Cunsel , Gleb Siroki
Abstract: A waveguide has an output diffractive optical element to couple light out of the waveguide towards a viewer, and a returning diffractive optical element to receive light from the output diffractive optical element and return the received light toward the output diffractive optical element. The output diffractive optical element has overlaid first and second output diffractive optical elements. The first output diffractive optical element receives light from an input direction and couples it toward the second output diffractive optical element in a first direction that is oblique to the input direction. The second output diffractive optical element receives light from the input direction and couples it towards the first output diffractive optical element in a second direction that is oblique to the input direction. The returning diffractive optical element has first and second returning diffractive optical elements that return light opposite the first and second directions, respectively.
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公开(公告)号：US12242059B2
公开(公告)日：2025-03-04
申请号：US17594592
申请日：2020-03-23
Applicant: Snap Inc.
Inventor： Mohmed Salim Valera , Sebastien De Cunsel , Gleb Siroki
Abstract: An augmented reality device is provided and comprises a waveguide (306); an input diffractive optical element (301) positioned in or on the waveguide (306) configured to receive light from a projector and to couple the light into the waveguide (306) so that it is captured within the waveguide (306) by total internal reflection; an output diffractive optical element (304) positioned in or on the waveguide (306) configured to couple totally internally reflected light out of the waveguide (306) towards a viewer; and a returning diffractive optical element (307, 309, 312) positioned in or on the waveguide (306) configured to receive light from the output diffractive optical element (304) and to diffract the received light so that it is returned towards the output diffractive optical element (304).
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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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