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    DISPLAY DEVICE WITH DIFFRACTION GRATING HAVING REDUCED POLARIZATION SENSITIVITY
    42.
    发明申请
    DISPLAY DEVICE WITH DIFFRACTION GRATING HAVING REDUCED POLARIZATION SENSITIVITY 有权

    公开(公告)号：US20250020841A1

    公开(公告)日：2025-01-16

    申请号：US18898376

    申请日：2024-09-26

    Applicant: Magic Leap, Inc.

    Inventor： Vikramjit Singh ,  Kang Luo ,  Xiaopei Deng ,  Shuqiang Yang ,  Frank Y. Xu ,  Kevin Messer

    IPC: G02B5/18 ,  F21V8/00 ,  G02B27/01

    Abstract: Diffraction gratings provide optical elements, e.g., in a head-mountable display system, that can affect light, for example by incoupling light into a waveguide, outcoupling light out of a waveguide, and/or multiplying light propagating in a waveguide. The diffraction gratings may be configured to have reduced polarization sensitivity such that light of different polarization states, or polarized and unpolarized light, is incoupled, outcoupled, multiplied, or otherwise affected with a similar level of efficiency. The reduced polarization sensitivity may be achieved through provision of a transmissive layer and a metallic layer on one or more gratings. A diffraction grating may comprise a blazed grating or other suitable configuration.

    Eyepieces for augmented reality display system
    43.
    发明授权
    Eyepieces for augmented reality display system 有权

    公开(公告)号：US12181678B2

    公开(公告)日：2024-12-31

    申请号：US18296803

    申请日：2023-04-06

    Applicant: Magic Leap, Inc.

    Inventor： Kevin Messer ,  Michael Anthony Klug

    IPC: G02B27/01 ,  F21V8/00 ,  G02B5/18 ,  G06F3/01

    Abstract: An augmented reality display system. The system can include a first eyepiece waveguide with a first input coupling grating (ICG) region. The first ICG region can receive a set of input beams of light corresponding to an input image having a corresponding field of view (FOV), and can in-couple a first subset of the input beams. The first subset of input beams can correspond to a first sub-portion of the FOV. The system can also include a second eyepiece waveguide with a second ICG region. The second ICG region can receive and in-couple at least a second subset of the input beams. The second subset of the input beams can correspond to a second sub-portion of the FOV. The first and second sub-portions of the FOV can be at least partially different but together include the complete FOV of the input image.

    SURFACE RELIEF WAVEGUIDES WITH HIGH REFRACTIVE INDEX RESIST
    44.
    发明申请
    SURFACE RELIEF WAVEGUIDES WITH HIGH REFRACTIVE INDEX RESIST 有权

    公开(公告)号：US20240418928A1

    公开(公告)日：2024-12-19

    申请号：US18729437

    申请日：2023-01-20

    Applicant: Magic Leap, Inc.

    Inventor： Matthew C Traub ,  Yingnan Liu ,  Vikramjit Singh ,  Frank Y. Xu ,  Robert D. Tekolste ,  Qizhen Xue ,  Samarth Bhargava ,  Victor Kai Liu ,  Brandon Michael-James Born ,  Kevin Messer

    IPC: F21V8/00 ,  G03F7/00

    Abstract: The disclosure describes an improved drop-on-demand, controlled volume technique for dispensing resist onto a substrate, which is then imprinted to create a patterned optical device suitable for use in optical applications such as augmented reality and/or mixed reality systems. The technique enables the dispensation of drops of resist at precise locations on the substrate, with precisely controlled drop volume corresponding to an imprint template having different zones associated with different total resist volumes. Controlled drop size and placement also provides for substantially less variation in residual layer thickness across the surface of the substrate after imprinting, compared to previously available techniques. The technique employs resist having a refractive index closer to that of the substrate index, reducing optical artifacts in the device. To ensure reliable dispensing of the higher index and higher viscosity resist in smaller drop sizes, the dispensing system can continuously circulate the resist.

    Eyepieces for augmented reality display system
    47.
    发明授权
    Eyepieces for augmented reality display system 有权

    公开(公告)号：US11977233B2

    公开(公告)日：2024-05-07

    申请号：US17825932

    申请日：2022-05-26

    Applicant: Magic Leap, Inc.

    Inventor： Samarth Bhargava ,  Victor Kai Liu ,  Kevin Messer

    IPC: G02B27/01 ,  G02B27/09 ,  G06V20/20

    CPC classification number: G02B27/0172 ,  G02B27/0944 ,  G02B27/0955 ,  G06V20/20 ,  G02B2027/0178

    Abstract: An eyepiece waveguide for an augmented reality display system may include an optically transmissive substrate, an input coupling grating (ICG) region, a multi-directional pupil expander (MPE) region, and an exit pupil expander (EPE) region. The ICG region may receive an input beam of light and couple the input beam into the substrate as a guided beam. The MPE region may include a plurality of diffractive features which exhibit periodicity along at least a first axis of periodicity and a second axis of periodicity. The MPE region may be positioned to receive the guided beam from the ICG region and to diffract it in a plurality of directions to create a plurality of diffracted beams. The EPE region may overlap the MPE region and may out couple one or more of the diffracted beams from the optically transmissive substrate as output beams.

    Eyepieces for augmented reality display system
    49.
    发明授权
    Eyepieces for augmented reality display system 有权

    公开(公告)号：US11754841B2

    公开(公告)日：2023-09-12

    申请号：US17576488

    申请日：2022-01-14

    Applicant: Magic Leap, Inc.

    Inventor： Samarth Bhargava ,  Victor Kai Liu ,  Kevin Messer

    IPC: G02B27/01 ,  G06T19/00 ,  G02B27/28

    CPC classification number: G02B27/0172 ,  G02B27/283 ,  G06T19/006 ,  G02B2027/0118

    Abstract: An eyepiece waveguide for an augmented reality display system. The eyepiece waveguide can include an input coupling grating (ICG) region. The ICG region can couple an input beam into the substrate of the eyepiece waveguide as a guided beam. A first combined pupil expander-extractor (CPE) grating region can be formed on or in a surface of the substrate. The first CPE grating region can receive the guided beam, create a first plurality of diffracted beams at a plurality of distributed locations, and out-couple a first plurality of output beams. The eyepiece waveguide can also include a second CPE grating region formed on or in the opposite surface of the substrate. The second CPE grating region can receive the guided beam, create a second plurality of diffracted beams at a plurality of distributed locations, and out-couple a second plurality of output beams.

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