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    Evacuated gratings and methods of manufacturing
    2.
    发明授权
    Evacuated gratings and methods of manufacturing 有权

    公开(公告)号：US11442222B2

    公开(公告)日：2022-09-13

    申请号：US17006569

    申请日：2020-08-28

    Applicant: DigiLens Inc.

    Inventor： Jonathan David Waldern ,  Alastair John Grant ,  Milan Momcilo Popovich ,  Shibu Abraham ,  Baeddan George Hill ,  Tsung-Jui Ho

    IPC: G02B6/02 ,  G02B6/293 ,  G02B6/12

    Abstract: Improvements to gratings for use in waveguides and methods of producing them are described herein. Deep surface relief gratings (SRGs) may offer many advantages over conventional SRGs and Bragg gratings, an important one being a higher S-diffraction efficiency. In one embodiment, deep SRGs can be implemented as polymer surface relief gratings or evacuated Bragg gratings (EBGs). EBGs can be formed by first recording a holographic polymer dispersed liquid crystal (HPDLC) grating. Removing the liquid crystal from the cured grating provides a polymer surface relief grating. Polymer surface relief gratings have many applications including for use in waveguide-based displays.

    Methods for Compensating for Optical Surface Nonuniformity
    4.
    发明公开
    Methods for Compensating for Optical Surface Nonuniformity 审中-公开

    公开(公告)号：US20240217142A1

    公开(公告)日：2024-07-04

    申请号：US18457227

    申请日：2023-08-28

    Applicant: DigiLens Inc.

    Inventor： Jonathan David Waldern ,  Shibu Abraham ,  Milan Momcilo Popovich

    IPC: B29C35/08 ,  G02F1/13 ,  G02F1/1334 ,  G02B6/12

    CPC classification number: B29C35/0805 ,  G02F1/1326 ,  G02F1/1334 ,  B29C2035/0827 ,  G02B2006/12166

    Abstract: Systems and methods for compensating for nonuniform surface topography features in accordance with various embodiments of the invention are illustrated. One embodiment includes a method for manufacturing waveguide cells, the method including providing a waveguide including first and second substrates and a layer of optical recording material, and applying a surface forming process to at least one external surface of the first and second substrates. In another embodiment, applying the surface forming process includes applying a forming material coating to the at least one external surface, providing a forming element having a forming surface, bringing the forming element in physical contact with the forming material coating, curing the forming material coating while it is in contact with the forming element, and releasing the forming material coating from the forming element.

    EVACUATING BRAGG GRATINGS AND METHODS OF MANUFACTURING
    5.
    发明申请
    EVACUATING BRAGG GRATINGS AND METHODS OF MANUFACTURING 有权

    公开(公告)号：US20210063634A1

    公开(公告)日：2021-03-04

    申请号：US17006569

    申请日：2020-08-28

    Applicant: DigiLens Inc.

    Inventor： Jonathan David Waldern ,  Alastair John Grant ,  Milan Momcilo Popovich ,  Shibu Abraham ,  Baeddan George Hill

    IPC: G02B6/02 ,  G02B6/12 ,  G02B6/293

    Abstract: Improvements to gratings for use in waveguides and methods of producing them are described herein. Deep surface relief gratings (SRGs) may offer many advantages over conventional SRGs and Bragg gratings, an important one being a higher S-diffraction efficiency. In one embodiment, deep SRGs can be implemented as polymer surface relief gratings or evacuated Bragg gratings (EBGs). EBGs can be formed by first recording a holographic polymer dispersed liquid crystal (HPDLC) grating. Removing the liquid crystal from the cured grating provides a polymer surface relief grating. Polymer surface relief gratings have many applications including for use in waveguide-based displays.

    Methods for Compensating for Optical Surface Nonuniformity
    6.
    发明申请
    Methods for Compensating for Optical Surface Nonuniformity 审中-公开

    公开(公告)号：US20200247017A1

    公开(公告)日：2020-08-06

    申请号：US16783019

    申请日：2020-02-05

    Applicant: DigiLens Inc.

    Inventor： Jonathan David Waldern ,  Shibu Abraham ,  Milan Momcilo Popovich

    IPC: B29C35/08 ,  G02F1/13 ,  G02F1/1334

    Abstract: Systems and methods for compensating for nonuniform surface topography features in accordance with various embodiments of the invention are illustrated. One embodiment includes a method for manufacturing waveguide cells, the method including providing a waveguide including first and second substrates and a layer of optical recording material, and applying a surface forming process to at least one external surface of the first and second substrates. In another embodiment, applying the surface forming process includes applying a forming material coating to the at least one external surface, providing a forming element having a forming surface, bringing the forming element in physical contact with the forming material coating, curing the forming material coating while it is in contact with the forming element, and releasing the forming material coating from the forming element.

    Low Haze Liquid Crystal Materials
    7.
    发明申请
    Low Haze Liquid Crystal Materials 审中-公开

    公开(公告)号：US20190212597A1

    公开(公告)日：2019-07-11

    申请号：US16242943

    申请日：2019-01-08

    Applicant: DigiLens, Inc.

    Inventor： Jonathan David Waldern ,  Shibu Abraham

    IPC: G02F1/1334 ,  G02F1/13 ,  C09K19/54 ,  G03F7/00

    CPC classification number: G02F1/13342 ,  C09K19/544 ,  C09K2019/521 ,  G02F1/1326 ,  G03F7/001

    Abstract: Photopolymerizable materials and in particular holographic polymer dispersed liquid crystal materials and processes for fabricating holographic waveguide devices from such materials are provided. Materials and formulations of photopolymerizable materials are sufficiently low haze to allow for the omission of adhesives from within the cell of the holographic waveguide devices. The photopolymerizable materials are used in association with methods of manufacturing holographic waveguides such that photopolymerizable materials may be used as an adhesive material.

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