中科微点-全球专利检索

  1. Login
  2. Sign Up

Search Results

264 records (took 0.031 seconds)

    Methods and Apparatus for Compensating Image Distortion and Illumination Nonuniformity in a Waveguide
    81.
    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
    82.
    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.

    Waveguides incorporating transmissive and reflective gratings and related methods of manufacturing
    87.
    发明授权
    Waveguides incorporating transmissive and reflective gratings and related methods of manufacturing 有权

    公开(公告)号：US12271035B2

    公开(公告)日：2025-04-08

    申请号：US18362870

    申请日：2023-07-31

    Applicant: DigiLens Inc.

    Inventor： Jonathan David Waldern ,  Alastair John Grant ,  Hyesog Lee ,  Gerald Buxton ,  Milan Momcilo Popovich

    IPC: G02B6/35 ,  F21V8/00 ,  G02B6/02 ,  G02B27/00

    Abstract: Multiplexed reflection and transmission gratings, and methods of their manufacture, are provided that improve uniformity with laser light, that is, reduced banding and other illumination artifacts occurring in waveguides. The mechanism for this can be the multiple reflections between the waveguide reflecting surfaces and the reflection hologram, which promote illumination averaging as beam propagation processes within a waveguide. In some gratings, a beam splitter layer overlapping the multiplexed gratings can be provided for the purposes of reducing banding in a laser-illuminated waveguide. The beam splitter can be provided by one or more dielectric layers. The beamsplitter can have sensitivity to one polarization. The beamsplitter can be sensitive to S-polarization. The beam splitter can be an anti-reflection coating optimized for normal incidence that becomes reflective at high TIR angles when immersed in glass or plastic.

    Wearable heads up displays
    88.
    发明授权
    Wearable heads up displays 有权

    公开(公告)号：US12248150B2

    公开(公告)日：2025-03-11

    申请号：US18171117

    申请日：2023-02-17

    Applicant: DigiLens Inc.

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

    IPC: G02B27/01 ,  G02B27/00 ,  G06F3/042 ,  G06F3/043

    Abstract: An optical display, including a first waveguide having a first set of surfaces, an input grating, a fold grating, and an output grating; an image input image node assembly; and a prismatic relay optics is provided. The prismatic relay optics may be configured to be optomechanically connected to the waveguide and the input image node assembly. The optical display is may also be configured to operate alone or as integrated with a headpiece to be used as a HUD. The HUD may have a first and a second configuration wherein the waveguide is decoupled or coupled.

    Eye glow suppression in waveguide based displays
    89.
    发明授权
    Eye glow suppression in waveguide based displays 有权

    公开(公告)号：US12222499B2

    公开(公告)日：2025-02-11

    申请号：US17645212

    申请日：2021-12-20

    Applicant: DigiLens Inc.

    Inventor： Alastair John Grant ,  Richard E. Bergstrom, Jr. ,  Roger Allen Conley Smith ,  Michiel Koen Callens ,  Nicholas Sherwood ,  Nima Shams ,  Milan Momcilo Popovich

    IPC: G02B27/01 ,  F21V8/00

    Abstract: Methods and apparatus for eye-glow suppression in waveguide systems is disclosed herein. Some embodiments of the methods and the apparatus include a source of image modulated light; a waveguide having an eye-facing surface and an external surface facing the outside world; an input coupler for coupling the light into a total reflection internal path in the waveguide; at least one grating for providing beam expansion and extracting light from the waveguide towards an eyebox; a polymer grating structure comprising a modulation depth and a grating pitch. The modulation depth is greater than the grating pitch across at least a portion of the polymer grating structure. Advantageously, the polymer grating structure is configured to diffract light entering the waveguide from the outside world or stray light generated within the waveguide away from optical paths that are refracted through the external surface into the outside world.

    Wide angle waveguide display
    90.
    发明授权
    Wide angle waveguide display 有权

    公开(公告)号：US12140764B2

    公开(公告)日：2024-11-12

    申请号：US18328535

    申请日：2023-06-02

    Applicant: DigiLens Inc.

    Inventor： Milan Momcilo Popovich ,  Alastair John Grant ,  Nima Shams ,  Jonathan David Waldern ,  Sihui He ,  Edward Lao ,  Roger Allen Conley Smith

    IPC: G02B27/01 ,  F21V8/00 ,  G02B6/34

    Abstract: Disclosed herein are systems and methods for providing waveguide display devices utilizing overlapping integrated dual axis (IDA) waveguides. One embodiment includes a waveguide display device including: a first input image source providing first image light; a second input image source provide second image light; a first IDA waveguide; and a second IDA waveguide. The first IDA waveguide and the second IDA waveguide may include an overlapping region where a first two-dimensionally expanded first image light, a second two-dimensionally expanded first image light, a first two-dimensionally expanded second image light, and a second two-dimensionally expanded second image light is ejected towards an eyebox. Advantageously, resolution may be enhanced and field of view may be expanded through the use of overlapping IDA waveguides.

Patent Agency Ranking