NONDESTRUCTIVE IMAGING AND SURFACE QUALITY INSPECTION OF STRUCTURED PLATES

    公开(公告)号:US20230296472A1

    公开(公告)日:2023-09-21

    申请号:US18201942

    申请日:2023-05-25

    CPC classification number: G01M11/081 G02B21/26 G02B21/04

    Abstract: A system includes a stage, a detector and a measuring device. The stage is configured to hold a substrate. The substrate includes a plurality of tapered structures, and each of the plurality of tapered structures includes a tapered wall between first and second openings at opposite ends of the plurality of tapered structures. The detector is tilted at a first angle and configured to measure light reflected from the tapered wall at about 90 degrees to the tapered wall. The first angle depends at least in part a second angle between the tapered wall and a longitudinal axis running through the tapered structure. The measuring device is configured to determine a characteristic of the tapered wall and whether the characteristic of the tapered wall is above or below a threshold.

    Liquid lenses
    2.
    发明授权

    公开(公告)号:US11762189B2

    公开(公告)日:2023-09-19

    申请号:US16642693

    申请日:2018-08-31

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

    Abstract: A liquid lens can have a chamber configured to improve the performance of the liquid lens, such as by improving the tilt response time and/or by reducing optical aberrations. The chamber can have sidewalls that conform to a shape of a truncated cone. The cone angle, and wide end diameter, and narrow end diameter can be selected by balancing competing factors. The liquid lens can include two fluids, and the fluid fill ratio can be selected to improve the performance of the liquid lens. In some embodiments, the sidewalls can conform to a portion of a sphere.

    Adjustable fluid lens with reduced aberration

    公开(公告)号:US11061219B2

    公开(公告)日:2021-07-13

    申请号:US16312019

    申请日:2017-06-22

    Abstract: A fluid lens includes a refractive interface positioned between two transparent plates where at least one surface of one of the plates has a fixed radius of curvature configured to compensate for aberration produced by the fluid lens. The refracting interface can be formed by a meniscus formed between two immiscible liquids or by a membrane positioned between two fluids. A method of reducing aberration of a fluid lens includes determining a fixed radius of curvature for at least one surface of one of the plates that is sufficient to compensate for aberration produced by the fluid lens.

    Method to prevent emulsion in a liquid lens

    公开(公告)号:US09952358B2

    公开(公告)日:2018-04-24

    申请号:US14824945

    申请日:2015-08-12

    CPC classification number: G02B3/14 G02B3/12 G02B26/005

    Abstract: Embodiments generally relate to methods for preventing the formation of an emulsion in a liquid lens. In one embodiment, the method comprises fabricating a top substrate, a bottom substrate, and a central substrate including a cavity configured to be filled by first and second liquids. The liquid lens comprising the top substrate, the bottom substrate and the central substrate is assembled, with at least one of the top substrate and the bottom substrate in the assembled liquid lens being characterized by a stabilizing feature determining that in response to an impact load on the assembled liquid lens that would cause localized pressure drops of maximum magnitude X in the absence of the stabilizing feature, the maximum magnitude of localized pressure drops within the liquid lens is smaller than X.

    Liquid lens control systems and methods with reduced phase delay

    公开(公告)号:US11914220B2

    公开(公告)日:2024-02-27

    申请号:US17054933

    申请日:2019-05-15

    CPC classification number: G02B7/09 G02B3/14 G02B27/646

    Abstract: A liquid lens includes an orientation sensor such as a gyroscope to compensate for the effects of motion. A raw gyroscope signal, including noise components, can be provided to the controller without processing by phase-shifting filters. One or more filters can be applied to the raw gyroscope signal to allow a band of frequencies to pass without introducing phase delay. The controller can use a feed forward system to generate control output signals based at least in part on the raw gyroscope signal, including noise components. The control output signals can be used to drive voltage signals to electrodes to compensate for motion.

    Nondestructive imaging and surface quality inspection of structured plates

    公开(公告)号:US11698326B2

    公开(公告)日:2023-07-11

    申请号:US16943721

    申请日:2020-07-30

    CPC classification number: G01M11/081 G02B21/04 G02B21/26

    Abstract: A system includes a stage, a detector and a measuring device. The stage is configured to hold a substrate. The substrate includes a plurality of tapered structures, and each of the plurality of tapered structures includes a tapered wall between first and second openings at opposite ends of the plurality of tapered structures. The detector is tilted at a first angle and configured to measure light reflected from the tapered wall at about 90 degrees to the tapered wall. The first angle depends at least in part a second angle between the tapered wall and a longitudinal axis running through the tapered structure. The measuring device is configured to determine a characteristic of the tapered wall and whether the characteristic of the tapered wall is above or below a threshold.

    Liquid lens systems
    10.
    发明授权

    公开(公告)号:US11567242B2

    公开(公告)日:2023-01-31

    申请号:US16763439

    申请日:2018-11-15

    Abstract: A liquid lens can be coupled to ground, such as to impede charge from building up in the liquid lens during operation thereof. For example, an electrode that is in electrical communication with a conductive fluid of the liquid lens can be coupled to ground. A switch can be used to selectively couple the liquid lens to ground, such as for discharging the liquid lens. An electrode can be selectively coupled to ground and to driving signals using a switch. In some cases, drive signals can be provided to electrodes other than the grounded electrode for driving the liquid lens. In some cases, the liquid lens can be driven using feedback control based on one or more measured parameters indicative capacitance between a fluid and one or more electrodes in the liquid lens.

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