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    Electroactive Lenses with Cylinder Rotational Control
    21.
    发明公开
    Electroactive Lenses with Cylinder Rotational Control 审中-公开

    公开(公告)号：US20230194897A1

    公开(公告)日：2023-06-22

    申请号：US18171935

    申请日：2023-02-21

    Applicant: e-Vision Smart Optics, Inc.

    Inventor： Anthony Van Heugten

    IPC: G02C7/08 ,  G02C7/02 ,  G02F1/1343

    CPC classification number: G02C7/083 ,  G02C7/022 ,  G02F1/134363

    Abstract: An electro-active lens with stacked, rotated cylindrical electro-active lens elements can provide cylinder power along more axes than there are cylindrical electro-active lens elements. For instance, six stacked cylindrical electro-active lens elements, each aligned with a different lens meridian, can produce cylinder power along fifteen unique meridians when actuated up to three at a time. If these fifteen meridians are spaced at 12° increments, then the lens stack can provide cylinder power that is aligned well to correct astigmatism along any axis. Each cylindrical electro-active lens element in the stack can include a liquid crystal layer that is actuated by linear electrodes that are parallel to each other and orthogonal to both the cylindrical electro-active lens element's cylinder axis and optical axis. The electro-active lens can also include a spherical lens element that provides spherical power in addition to any net spherical power produced by the stacked cylindrical electro-active lens elements.

    ELECTRO-ACTIVE LENSES WITH RAISED RESISTIVE BRIDGES
    25.
    发明申请
    ELECTRO-ACTIVE LENSES WITH RAISED RESISTIVE BRIDGES 有权

    公开(公告)号：US20220317540A1

    公开(公告)日：2022-10-06

    申请号：US17842472

    申请日：2022-06-16

    Applicant: e-Vision Smart Optics, Inc.

    Inventor： Anthony Van Heugten ,  Harry Milton

    IPC: G02F1/29 ,  A61F2/16

    Abstract: Resistive bridges can connect many ring electrodes in an electro-active lens with a relatively small number of buss lines. These resistors are usually large to prevent excessive current consumption. Conventionally, they are disposed in the same plane as the ring electrodes, which means that the ring electrodes are spaced farther apart or made discontinuous to accommodate the resistors. But spacing the ring electrodes farther apart or making them discontinuous degrades the lens's optical quality. Placing the ring electrodes and resistors on layers separated by an insulator makes it possible for the ring electrodes to be closer together and continuous with resistance high enough to limit current consumption. It also relaxes constraints on feature sizes and placement during the process used to make the lens. And because the resistors and electrodes are on different planes, they can be formed of materials with different resistivities.

    PRISM-ENHANCED LENSES AND METHODS OF USING PRISM-ENHANCED LENSES
    27.
    发明申请
    PRISM-ENHANCED LENSES AND METHODS OF USING PRISM-ENHANCED LENSES 有权

    公开(公告)号：US20220214565A1

    公开(公告)日：2022-07-07

    申请号：US17554431

    申请日：2021-12-17

    Applicant: e-Vision Smart Optics, Inc.

    Inventor： Anthony Van Heugten ,  Harry Milton

    IPC: G02C7/08 ,  G02F1/29 ,  G02B3/08 ,  G02C7/04

    Abstract: An electro-active lens is presented which utilizes a surface relief structures and an electro-active material, with a change in refractive index facilitating the change in optical properties. A molded structure and a liquid crystal are used to form a diffractive lens. In addition to the classical approach of utilizing diffractive optics and multiple Fresnel zones to form a lens, an additional structure is placed between Fresnel zones in order to improve the diffraction efficiency across the visible spectrum and reduce chromatic aberration.

    Prism-enhanced lenses and methods of using prism-enhanced lenses
    28.
    发明授权
    Prism-enhanced lenses and methods of using prism-enhanced lenses 有权

    公开(公告)号：US11231601B2

    公开(公告)日：2022-01-25

    申请号：US17025090

    申请日：2020-09-18

    Applicant: e-Vision Smart Optics, Inc.

    Inventor： Anthony Van Heugten ,  Harry Milton

    IPC: G02C7/08 ,  G02F1/29 ,  G02B3/08 ,  G02C7/04

    Abstract: An electro-active lens is presented which utilizes a surface relief structures and an electro-active material, with a change in refractive index facilitating the change in optical properties. A molded structure and a liquid crystal are used to form a diffractive lens. In addition to the classical approach of utilizing diffractive optics and multiple Fresnel zones to form a lens, an additional structure is placed between Fresnel zones in order to improve the diffraction efficiency across the visible spectrum and reduce chromatic aberration.

    Multi-depth liquid crystal electrode layer lens
    29.
    发明授权
    Multi-depth liquid crystal electrode layer lens 有权

    公开(公告)号：US11226533B2

    公开(公告)日：2022-01-18

    申请号：US17285346

    申请日：2020-12-07

    Applicant: e-Vision Smart Optics, Inc.

    Inventor： Anthony Van Heugten

    IPC: G02F1/29

    Abstract: A typical liquid crystal lens includes liquid crystal sandwiched between transparent substrates, which are patterned with ring electrodes. Applying a voltage across the electrodes causes the liquid crystal molecules to rotate, changing their apparent refractive index and the lens's focal length. The ring electrodes are separated by gaps and get narrower toward the lens's periphery. If the ring electrodes are too narrower, their cannot switch the liquid crystal well. To address this problem, an inventive liquid crystal lens includes a substrate with a stepped surface that defines concentric liquid crystal regions with thicknesses that increase with lens radius. Each region is switched by a different set of ring electrodes, which may be on, under, or opposite the stepped surface. Within each region, the ring electrodes get narrower farther from the lens's center. But the ring electrodes' widths also increase with liquid crystal thickness, offsetting the decrease in width that degrades lens performance.

    Augmented Reality Device with Adjustable Electroactive Beam Splitter
    30.
    发明申请
    Augmented Reality Device with Adjustable Electroactive Beam Splitter 有权

    公开(公告)号：US20210223601A1

    公开(公告)日：2021-07-22

    申请号：US17225733

    申请日：2021-04-08

    Applicant: e-Vision Smart Optics, Inc.

    Inventor： Anthony Van Heugten ,  Anita Trajkovska-Broach ,  Harry Milton

    IPC: G02F1/137 ,  G02F1/1335 ,  G02F1/13 ,  G06T19/00

    Abstract: Bright ambient light can wash out a virtual image in a conventional augmented reality device. Fortunately, this problem can be prevented with a variable electro-active beam splitter whose reflect/transmit ratio can be varied or switched on and off rapidly at a duty cycle based on the ambient level. As the ambient light gets brighter, the beam splitter's transmit/reflect ratio can be shifted so that the beam splitter reflects more light from the display and transmits less ambient light to the user's eye. The beam splitter can also be switched between a highly reflective state and a highly transmissive state at a duty cycle selected so that the eye spends more time integrating reflected display light than integrating transmitted ambient light. The splitting ratio and/or duty cycle can be adjusted as the ambient light level changes to provide the optimum experience for the user.

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