知搜-全球专利检索

  1. Login
  2. Sign Up

Search Results

228 records (took 0.022 seconds)

    Methods and Apparatus for Compensating Image Distortion and Illumination Nonuniformity in a Waveguide
    71.
    发明申请
    Methods and Apparatus for Compensating Image Distortion and Illumination Nonuniformity in a Waveguide 审中-公开

    公开(公告)号：US20190064735A1

    公开(公告)日：2019-02-28

    申请号：US16118328

    申请日：2018-08-30

    Applicant: DigiLens, Inc.

    Inventor： Jonathan David Waldern ,  Sihui He ,  Alastair John Grant ,  Milan Momcilo Popovich

    IPC: G03H1/02 ,  G03H1/04

    Abstract: Typical waveguides rely on total internal reflection between the outer surfaces of substrates, which can make them highly susceptible to beam misalignment caused by nonplanarity of the substrates. In the manufacturing of the glass sheets commonly used for substrates, ripples can occur during the stretching and drawing of glass as it emerges from a furnace. Although glass manufacturers try to minimize ripples using predictions from mathematical models, it is difficult to totally eradicate the problem from the glass manufacturing process. Typically, these beam misalignments manifest themselves as image distortions and non-uniformities in the output illumination from the waveguide. Many embodiments of the invention are directed toward optically efficient, low cost solutions to the problem of controlling output image quality in waveguides manufactured using commercially available substrate glass and to the problem of compensating the image distortions and non-uniformity of curved waveguides.

    Laser despeckler based on angular diversity
    72.
    发明授权
    Laser despeckler based on angular diversity 有权

    公开(公告)号：US10185154B2

    公开(公告)日：2019-01-22

    申请号：US15043806

    申请日：2016-02-15

    Applicant: DigiLens, Inc.

    Inventor： Milan Momcilo Popovich ,  Jonathan David Waldern

    IPC: G02B5/32 ,  G03H1/04 ,  G02B27/48 ,  G02B5/02 ,  G02F1/1334 ,  G02F1/1333 ,  G02F1/29 ,  F21V8/00 ,  G02B27/28 ,  G03B21/00 ,  G03B21/20 ,  G02F1/1335

    Abstract: A device for reducing laser speckle using a micro scanner and a holographic diffuser. The micro scanner includes a first transparent optical substrate with an input surface and an output surface and a second transparent optical substrate with an input surface and an output surface and a variable refractive index medium sandwiched between the output surface of the first substrate and the input surface of the second substrate. Transparent electrodes are applied to the output surface of the first substrate and the input surface of the second substrate. The electrodes are coupled to a voltage generator. The input surface of the first substrate is optically coupled to a laser source. The input surface of the second substrate is configured as an array of prismatic elements. At least one of the input surface of the first substrate or the output surfaces of the second substrate is planar.

    Holographic waveguide display with light control layer
    76.
    发明授权
    Holographic waveguide display with light control layer 有权

    公开(公告)号：US12210153B2

    公开(公告)日：2025-01-28

    申请号：US18311851

    申请日：2023-05-03

    Applicant: DigiLens Inc.

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

    IPC: G02B27/01 ,  G02B5/32

    Abstract: Waveguides and waveguide displays having a layer for blocking non-image light (i.e. haze) that could otherwise reduce contrast and degrade color gamut and uniformity, while providing high transmission to external light are provided. Many waveguides and displays incorporate at least one light control layer applied to at least one external surface of a waveguide supporting at least one grating and overlapping at least a portion of the at least one grating, to divert or block scattered light from the set of gratings that might otherwise enter said eyebox.

    Photopolymers for Holographic Recording
    79.
    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.

Patent Agency Ranking