LIQUID LENSES AND LIQUID LENS ARTICLES WITH LOW REFLECTIVITY ELECTRODE STRUCTURES

    公开(公告)号:US20220107495A1

    公开(公告)日:2022-04-07

    申请号:US17424921

    申请日:2020-01-20

    Abstract: A liquid lens article that includes: a first substrate; and an electrode disposed on a primary surface of the first substrate. The electrode comprises an electrically conductive structure disposed on the primary surface of the first substrate and an optical absorber structure disposed on the electrically conductive structure. The electrode comprises a reflectivity minimum of about 3% or less at a visible wavelength within a range of 390 nm to 700 nm, and a reflectivity of about 25% or less at an ultraviolet wavelength within a range of 100 nm to 400 nm. Further, the absorber structure comprises at least two metal oxide layers and at least one metal layer, each metal layer between two of the metal oxide layers. In addition, the electrode can comprise a sheet resistance from about 5 Ω/sq to about 0.5 Ω/sq.

    VARIABLE VOLUME LIQUID LENSES
    22.
    发明申请

    公开(公告)号:US20220035079A1

    公开(公告)日:2022-02-03

    申请号:US17276964

    申请日:2019-09-20

    Abstract: A liquid lens can include a chamber with first and second fluids and an interface between the fluids. A first electrode can be insulated from the fluids, and a second electrode can be in electrical communication with the first fluid. A position of the interface can be based at least in part on a voltage applied between the first and second electrodes. A flexure can be configured to cause a window to displace axially along an optical axis to change a volume of the chamber. The flexure can extend laterally outward from the window substantially linearly, and can be formed between a first recess on an outer side of the liquid lens and a second recess on an inner side of the liquid lens. The second recess can extend laterally outward farther than the first recess such that the first recess and the second recess are offset from each other.

    Liquid lens control systems and methods

    公开(公告)号:US11927772B2

    公开(公告)日:2024-03-12

    申请号:US16976857

    申请日:2019-03-05

    CPC classification number: G02B3/14 G02B26/005 G02B13/0075 G02B27/646

    Abstract: A liquid lens system can include a liquid lens and a controller. The liquid lens can include a chamber, first and second fluids contained in the chamber and substantially immiscible to form a fluid interface therebetween, a plurality of insulated electrodes that are insulated from the first and second fluids, and one or more electrodes in electrical communication with the first fluid. A position of the fluid interface can be based at least in part on voltages applied between the plurality of insulated electrodes and the one or more electrodes in electrical communication with the first fluid. The controller can provide voltages to the plurality of insulated electrodes to tilt the fluid interface along a tilt direction, wherein a second average radius of curvature along a direction orthogonal to the tilt direction differs from a first average radius of curvature along the tilt direction by no more than about 20%.

    Liquid lens control systems and methods

    公开(公告)号:US11822100B2

    公开(公告)日:2023-11-21

    申请号:US16500627

    申请日:2018-04-05

    CPC classification number: G02B3/14 G02B3/0006 G02B26/004 G02B27/646

    Abstract: Control systems for liquid lenses can use feedback control using one or more measured parameters indicative of a position of the fluid interface in the liquid lens. Capacitance between a fluid and an electrode in the liquid lens can vary depending on the position of the fluid interface. Current mirrors can be used for making measurements indicative of the capacitance and/or the fluid interface position. The liquid lens can be calibrated using the measurements indicative of capacitance and/or fluid interface position as the voltage is driven across an operational range. A control system can use pulse width modulation (PWM) for driving a liquid lens, and a carrier frequency for the PWM signals can be varied to control power consumption in the liquid lens. The slew rate can be adjustable to control power consumption in the liquid lens.

    LIQUID LENS CONTROL SYSTEMS AND METHODS

    公开(公告)号:US20210231966A1

    公开(公告)日:2021-07-29

    申请号:US17056978

    申请日:2019-05-21

    Abstract: A liquid lens can tilt a fluid interface, such as for optical image stabilization or off-axis focus. Tilting the interface can cause coma aberration or other dynamic wavefront error. The liquid lens can be driven to reduce the coma aberration or other dynamic wavefront error. For example, input shaped signals can be used. In some cases, the signals can be overdriven and/or underdriven, which can increase response time, and/or encourage settling of the interface.

    ELECTROWETTING DEVICES
    28.
    发明申请

    公开(公告)号:US20210208387A1

    公开(公告)日:2021-07-08

    申请号:US17056851

    申请日:2019-05-21

    Abstract: An optical device can include an optical member, positioned at an interface between a first liquid and a second liquid. The optical member can be positionally actuated using the first and second liquid. The optical member may include a plastic lens, a ball lens, a ball lens array, an actuated liquid lens, a biconcave lens, a biconvex lens, a plano-convex, a plano-concave, a negative meniscus lens, a positive meniscus lens, a convex-concave lens, or a concave-convex lens, or any other suitable lens type. The optical member can be actuated in an optical tilt direction, in a left-right horizontal direction, in an up-down vertical direction, in a yaw rotational direction, in an axial direction, or a combination thereof. The optical member can be actuated using electrowetting, using magneto rheological fluids, using static electrofields, using electrical actuation, or using mechanical actuation, for example.

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