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    Systems and Methods for Manufacturing Waveguide Cells
    13.
    发明申请
    Systems and Methods for Manufacturing Waveguide Cells 有权

    公开(公告)号：US20210223585A1

    公开(公告)日：2021-07-22

    申请号：US17136884

    申请日：2020-12-29

    Applicant: DigiLens Inc.

    Inventor： Jonathan David Waldern ,  Ratson Morad ,  Alastair John Grant ,  Sihui He ,  Shibu Abraham ,  Milan Momcilo Popovich

    IPC: G02F1/13 ,  G02B6/13 ,  G02B27/09 ,  G02B6/122 ,  G02B27/00 ,  G02B5/18 ,  G02B27/01 ,  G03H1/00 ,  B29D11/00 ,  B82Y20/00

    Abstract: Systems for the manufacturing of waveguide cells in accordance with various embodiments can be configured and implemented in many different ways. In many embodiments, various deposition mechanisms are used to deposit layer(s) of optical recording material onto a transparent substrate. A second transparent substrate can be provided, and the three layers can be laminated to form a waveguide cell. Suitable optical recording material can vary widely depending on the given application. In some embodiments, the optical recording material deposited has a similar composition throughout the layer. In a number of embodiments, the optical recording material spatially varies in composition, allowing for the formation of optical elements with varying characteristics. Regardless of the composition of the optical recording material, any method of placing or depositing the optical recording material onto a substrate can be utilized.

    Holographic Polymer Dispersed Liquid Crystal Mixtures with High Diffraction Efficiency and Low Haze
    14.
    发明申请
    Holographic Polymer Dispersed Liquid Crystal Mixtures with High Diffraction Efficiency and Low Haze 审中-公开

    公开(公告)号：US20200271973A1

    公开(公告)日：2020-08-27

    申请号：US16799735

    申请日：2020-02-24

    Applicant: DigiLens Inc.

    Inventor： Jonathan David Waldern ,  Shibu Abraham

    IPC: G02F1/1334 ,  G03H1/02

    Abstract: Holographic polymer dispersed liquid crystal material systems in accordance with various embodiments of the invention are illustrated. One embodiment includes a holographic polymer dispersed liquid crystal formulation, including monomers, photoinitiators, and a liquid crystal mixture including terphenyl compounds and non-terphenyl compounds, the liquid crystal mixture having a ratio of at least 1:10 by weight percentage of the terphenyl compounds to the non-terphenyl compounds, wherein the photoinitiators are configured to facilitate a photopolymerization induced phase separation process of the monomers and the liquid crystal mixture. In another embodiment, the liquid crystal mixture further includes pyrimidine compounds, and wherein the liquid crystal mixture has a ratio of at least 1:10 by weight percentage of the terphenyl compounds and pyrimidine compounds to the non-terphenyl compounds. In a further embodiment, the ratio of the terphenyl compounds to the non-terphenyl compounds is at least 1.5:10.

    Photopolymers for Holographic Recording
    16.
    发明公开
    Photopolymers for Holographic Recording 审中-公开

    公开(公告)号：US20240201584A1

    公开(公告)日：2024-06-20

    申请号：US18553512

    申请日：2022-03-30

    Applicant: DigiLens Inc.

    Inventor： Shibu Abraham ,  Milan Momcilo Popovich ,  Alastair John Grant ,  Ratson Morad ,  Hua Gu ,  Gerald Buxton

    IPC: G03F7/00 ,  C08F2/50 ,  G02B5/32 ,  G03F7/031 ,  G03F7/105

    CPC classification number: G03F7/001 ,  C08F2/50 ,  G03F7/031 ,  G03F7/105 ,  G02B5/32

    Abstract: Waveguide based displays benefit from gratings which are capable of diffracting both S and P polarized light with high efficiency. While typical surface relief gratings (SRGs) diffract P polarized light efficiently, SRGs do not typically diffract S polarized light efficiently. One class of gratings that diffracts S polarized light with high efficiency is deep SRGs. One approach to producing deep SRGs is holographic polymer dispersed liquid crystal (HPDLC) gratings. In producing HPDLC gratings, a reactive monomer mixture is exposed to light in a polymerization process. Reactive monomer mixtures may include co-initiators and photo-initiator dyes. Co-initiators which include liquid amine synergist have been demonstrated to have advantageous results. Further, photo-initiator dyes with high extinction coefficients have demonstrated advantageous results.

    Photonic Crystals and Methods for Fabricating the Same
    18.
    发明公开
    Photonic Crystals and Methods for Fabricating the Same 审中-公开

    公开(公告)号：US20240027670A1

    公开(公告)日：2024-01-25

    申请号：US18254118

    申请日：2021-11-22

    Applicant: DigiLens Inc.

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

    IPC: G02B5/32 ,  G02B27/42 ,  G02B17/08

    CPC classification number: G02B5/32 ,  G02B27/4261 ,  G02B17/086 ,  G02B2027/0105

    Abstract: Disclosed herein are various implementations display devices including phonic crystals. One embodiment includes a heads-up display including: a picture generation unit for projecting collimated light over a field of view; a first waveguide comprising an input grating for coupling the light from the picture generation unit into a total internal reflection path in the first waveguide and an output grating for providing beam expansion and light extraction from the first waveguide; a curved transparent substrate; and a mirror disposed with its reflecting surface facing a waveguide output surface of the first waveguide. The mirror may be configured to reflect light extracted from the first waveguide back through the first waveguide towards the curved transparent substrate. The first waveguide may be configured such that the curved transparent substrate reflects light extracted from the first waveguide towards an eyebox forming a virtual image viewable through the transparent curved substrate from the eyebox.

    Evacuated Gratings and Methods of Manufacturing
    20.
    发明申请
    Evacuated Gratings and Methods of Manufacturing 有权

    公开(公告)号：US20220155623A1

    公开(公告)日：2022-05-19

    申请号：US17648511

    申请日：2022-01-20

    Applicant: DigiLens Inc.

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

    IPC: G02F1/13 ,  G02B5/18

    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.

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