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    Optical element, varifocal element and head mounted display
    3.
    发明授权
    Optical element, varifocal element and head mounted display 有权

    公开(公告)号：US11886094B2

    公开(公告)日：2024-01-30

    申请号：US18110810

    申请日：2023-02-16

    Applicant: Sharp Display Technology Corporation

    Inventor： Daisuke Minami ,  Hiroaki Asagi ,  Kiyoshi Minoura

    IPC: G02F1/29

    CPC classification number: G02F1/294

    Abstract: Provided is an optical element including: a first liquid crystal cell including first liquid crystal molecules and a first electrode; and a second liquid crystal cell including second liquid crystal molecules and a second electrode, the first and second electrodes disposed to enable switching between a first state twist-aligning the second liquid crystal molecules and vertically aligning the first liquid crystal molecules and a second state twist-aligning the first liquid crystal molecules and vertically aligning the second liquid crystal molecules. Alignment directions of the second liquid crystal molecules near a third substrate and the second liquid crystal molecules near a fourth substrate in the first state are respectively at azimuthal angles resulting from a ¼ turn in the same direction of azimuthal angles of alignment directions of the first liquid crystal molecules near the first substrate and the first liquid crystal molecules near the second substrate in the second state.

    Hybrid varifocal lens
    5.
    发明授权
    Hybrid varifocal lens 有权

    公开(公告)号：US11852949B1

    公开(公告)日：2023-12-26

    申请号：US17176863

    申请日：2021-02-16

    Applicant: META PLATFORMS TECHNOLOGIES, LLC

    Inventor： Lu Lu ,  Wai Sze Tiffany Lam ,  Yusufu Njoni Bamaxam Sulai

    IPC: G02F1/29

    CPC classification number: G02F1/29 ,  G02F1/294 ,  G02F2202/40 ,  G02F2203/28

    Abstract: A hybrid lens is disclosed including optically coupled varifocal lens and adaptive lens. The varifocal lens is configured for varying optical power of the hybrid lens, and an adaptive lens includes a voltage-controlled element for varying optical power of the adaptive lens in coordination with varying the optical power of the varifocal lens and responsive to variation of the optical power of the hybrid lens, for lessening an optical aberration of the hybrid lens. The hybrid lens may be used in head-mounted displays e.g. for lessening a vergence-accommodation conflict.

    Electrode Driving Schemes for Tunable Lens Systems
    6.
    发明公开
    Electrode Driving Schemes for Tunable Lens Systems 审中-公开

    公开(公告)号：US20230408848A1

    公开(公告)日：2023-12-21

    申请号：US18456315

    申请日：2023-08-25

    Applicant: Apple Inc.

    Inventor： Patrick R. Gill ,  Louis Luh ,  Eric G. Smith

    IPC: G02C7/08 ,  G02F1/29

    CPC classification number: G02C7/083 ,  G02F1/294

    Abstract: A pair of eyeglasses may include one or more adjustable lenses. An adjustable lens may include electrically modulated optical material such as one or more liquid crystal cells having a phase profile that is adjusted using patterned electrodes. Digital-to-analog converter circuits may provide voltages to the electrodes. To save space on the lens, a smaller number of digital-to-analog converter circuits may provide voltages to a greater number of electrodes by sequentially coupling and decoupling the digital-to-analog converter circuits to different groups of electrodes, advancing from group-to-group with each clock cycle by a number of electrodes that is less than the number of digital-to-analog converter circuits. At least one of the electrodes in each group may be driven at the same voltage for two consecutive clock cycles to avoid erroneous voltages resulting from the parasitic capacitance between adjacent fingers.

    Electrically-tunable lenses and lens systems
    7.
    发明公开
    Electrically-tunable lenses and lens systems 审中-公开

    公开(公告)号：US20230375884A1

    公开(公告)日：2023-11-23

    申请号：US18362981

    申请日：2023-08-01

    Applicant: Optica Amuka (A.A.) Ltd.

    Inventor： Yoav Yadin ,  Yariv Haddad ,  Alex Alon

    IPC: G02F1/1343 ,  G02F1/29

    CPC classification number: G02F1/134309 ,  G02F1/29 ,  G02F1/13439 ,  G02F1/294

    Abstract: An optical device includes an electro-optical layer, having an effective local index of refraction at any given location within an active area of the electro-optical layer that is determined by a voltage waveform applied across the electro-optical layer at the location. Conductive electrodes extend over the first and second sides of the electro-optical layer. The conductive electrodes include an array of excitation electrodes including parallel stripes of a transparent conductive material having gaps between the stripes of a gap width that is less than the layer thickness of the electro-optical layer. Control circuitry is coupled to apply respective control voltage waveforms to the excitation electrodes and to modify the control voltage waveforms applied to each of the excitation electrodes concurrently and independently so as to generate a phase modulation profile in the electro-optical layer.

    TECHNIQUES FOR TUNABLE BEAM FOCUS COMPENSATION FOR MULTIPLE BEAM LIDAR SYSTEMS
    10.
    发明公开
    TECHNIQUES FOR TUNABLE BEAM FOCUS COMPENSATION FOR MULTIPLE BEAM LIDAR SYSTEMS 审中-公开

    公开(公告)号：US20230350025A1

    公开(公告)日：2023-11-02

    申请号：US17731783

    申请日：2022-04-28

    Applicant: Aeva, Inc.

    Inventor： Shijun Xiao

    IPC: G01S7/481 ,  G01S17/89 ,  G02F1/29 ,  G02B27/30 ,  G02B26/12

    CPC classification number: G01S7/4814 ,  G01S7/4817 ,  G01S17/89 ,  G02F1/294 ,  G02B27/30 ,  G02B26/12

    Abstract: A light detection and ranging (LIDAR) system includes a beam collimator, a plurality of first lenses, a plurality of tunable lenses, and one or more optical sources to generate a plurality of optical beams. Each tunable lens may be disposed adjacent a respective one of the plurality of first lenses such that the respective one of the plurality of first lenses is between the tunable lens and the beam collimator. Each of the plurality of optical beams may pass through one of the tunable lenses and one of the first lenses towards the beam collimator. Each of the plurality of tunable lenses may be separately controllable by selectively applying voltage to the tunable lens to adjust a focal length of the tunable lens to compensate for a variation in focus positions of the plurality of first lenses.

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