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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：US20250085477A1
公开(公告)日：2025-03-13
申请号：US18719675
申请日：2022-12-21
Applicant: Snap Inc.
Inventor： Arseny Alexeev , Venkata Karthik Nagareddy , Nirdesh Ojha , Philip Andrew Greenhalgh , David Hayes
Abstract: An optical waveguide manufacturing method includes: receiving a master template having a plurality of individual waveguide structures imprinted thereon; coating the master template with a curable master template stamp material; curing the master template stamp material to form a master template stamp; separating the master template stamp from the master template; imprinting the master template stamp onto one or more first substrates having an imprintable coating to form one or more master template copies, each master template copy having a plurality of individual waveguide structure copies imprinted thereon; curing the one or more master template copies; separating the master template stamp from the one or more master template copies; coating one of the one or more master template copies with a curable working stamp material; curing the working stamp material to form a working stamp for manufacturing optical waveguides; and separating the master template copy from the working stamp.
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Patent Agency Ranking
公开(公告)号：US20220334396A1
公开(公告)日：2022-10-20
申请号：US17718059
申请日：2022-04-11
Applicant: Snap Inc.
Inventor： Arseny Alexeev , Cheng Shi , Christian William Olavi Sol , Parashara Panduranga , Venkata Karthik Nagareddy
Abstract: An optical waveguide combiner includes an optical waveguide substrate and an optical input region. The optical input region includes an optical input diffractive grating integrated in, or disposed on, the optical waveguide substrate. An optical output region includes an optical output diffractive grating integrated in, or disposed on, the optical waveguide substrate, At least one non-diffractive region includes at least one optical non-diffractive array of nanostructures, wherein said at least one optical non-diffractive array of nanostructures is integrated in, or disposed on, the object side of said optical waveguide substrate and at least partially surrounds at least said optical output grating; wherein the external visible reflectance of said at least one non-diffractive array of nanostructures is substantially equal to the external visible reflectance of said optical output grating.
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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：US20240036257A1
公开(公告)日：2024-02-01
申请号：US18256608
申请日：2021-12-07
Applicant: Snap Inc.
Inventor： Roland Piper , Arseny Alexeev
CPC classification number: G02B6/262 , G02B27/0081 , G02B27/0172 , G02B2027/0178
Abstract: An optical device for an augmented reality or virtual reality display. A first input diffractive optical element is arranged on a waveguide to receive light from a projector, couple a first portion of the light into the waveguide along a first path, and allow a second portion of the light to pass through. A second input diffractive optical element is arranged to receive the second portion of the light and couple a third portion of the received light along a second path. An output diffractive optical element receives light along the first and second paths and couples the received light out of the waveguide towards a viewer at a first pattern of positions for light along the first path and at a second pattern of positions for light along the second path, providing a first and second plurality of exit pupils corresponding to the first and second pattern of positions.
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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：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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