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    Pulsed laser diode driver
    1.
    发明授权
    Pulsed laser diode driver 有权

    公开(公告)号：US10886697B2

    公开(公告)日：2021-01-05

    申请号：US16219754

    申请日：2018-12-13

    Applicant: Analog Devices, Inc.

    Inventor： Erik D. Barnes ,  Lawrence A. Singer ,  Harvey Weinberg

    IPC: H01S5/042 ,  H01S3/10 ,  H01S5/026 ,  H01S5/06 ,  H01S5/068 ,  H01S5/40

    Abstract: Optical systems can emit train(s) of light pulses onto objects to derive a distance between the light source and the object. Achieving meter or centimeter resolution may require very short light pulses. It is not trivial to design a circuit that can generate narrow current pulses for driving a diode that emits the light pulses. An improved driver circuit has a pre-charge path comprising one or more inductive elements and a fire path comprising the diode. Switches in the driver circuit are controlled with predefined states during different intervals to pre-charge current in the one or more inductive elements prior to flowing current through the fire path to pulse the diode.

    Pulsed laser diode driver
    2.
    发明授权
    Pulsed laser diode driver 有权

    公开(公告)号：US10158211B2

    公开(公告)日：2018-12-18

    申请号：US15244532

    申请日：2016-08-23

    Applicant: ANALOG DEVICES, INC.

    Inventor： Erik D. Barnes ,  Lawrence A. Singer ,  Harvey Weinberg

    IPC: H01S5/042 ,  H01S3/10 ,  H01S5/026 ,  H01S5/06 ,  H01S5/068 ,  H01S5/40

    Abstract: Optical systems can emit train(s) of light pulses onto objects to derive a distance between the light source and the object. Achieving meter or centimeter resolution may require very short light pulses. It is not trivial to design a circuit that can generate narrow current pulses for driving a diode that emits the light pulses. An improved driver circuit has a pre-charge path comprising one or more inductive elements and a fire path comprising the diode. Switches in the driver circuit are controlled with predefined states during different intervals to pre-charge current in the one or more inductive elements prior to flowing current through the fire path to pulse the diode.

    Interline charge-coupled devices
    4.
    发明授权
    Interline charge-coupled devices 有权

    公开(公告)号：US09749565B2

    公开(公告)日：2017-08-29

    申请号：US15012912

    申请日：2016-02-02

    Applicant: ANALOG DEVICES, INC.

    Inventor： Erik D. Barnes ,  Jonathan Goldberg

    IPC: H04N5/372 ,  H04N5/3728 ,  G01S17/89 ,  G01S17/10 ,  G01S17/36 ,  G01S7/486

    CPC classification number: H04N5/3728 ,  G01S7/4863 ,  G01S17/10 ,  G01S17/36 ,  G01S17/89 ,  H04N5/37213

    Abstract: Image capturing systems with interline CCD structures designed to reduce the delay between captures of subsequent image frames are disclosed. Proposed interline CCD structures include two or more sets of storage units associated with a given set of photodetecting elements, where each photodetecting element is associated with one storage unit of each set of storage units in that the charge generated by the photodetecting element during the acquisition of a particular image frame (i.e. during a particular exposure period) may be stored any one of these storage units prior to read-out. Providing multiple sets of storage units allows read-out of charge corresponding to one image frame and stored in one set of storage units while accumulating charge corresponding to another image frame in another set of storage units, thus reducing the delay between captures of different image frames. Consequently, errors and artifacts of the image capturing system can be minimized.

    Measuring and removing the corruption of time-of-flight depth images due to internal scattering
    7.
    发明授权
    Measuring and removing the corruption of time-of-flight depth images due to internal scattering 有权

    公开(公告)号：US11092678B2

    公开(公告)日：2021-08-17

    申请号：US16387385

    申请日：2019-04-17

    Applicant: Analog Devices, Inc.

    Inventor： Erik D. Barnes ,  Charles Mathy ,  Sefa Demirtas

    IPC: G01S7/487 ,  G01S7/48 ,  G01S17/10 ,  H04N5/225 ,  H04N5/243 ,  G01S17/894

    Abstract: Depth imagers can implement time-of-flight operations to measure depth or distance of objects. A depth imager can emit light onto a scene and sense light reflected back from the objects in the scene using an array of sensors. Timing of the reflected light hitting the array of sensors gives information about the depth or distance of objects in the scene. In some cases, corrupting light that is outside of a field of view of a pixel in the array of sensors can hit the pixel due to internal scattering or internal reflections occurring in the depth imager. The corrupting light can corrupt the depth or distance measurement. To address this problem, an improved depth imager can isolate and measure the corrupting light due to internal scattering or internal reflections occurring in the depth imager, and systematically remove the measured corrupting light from the depth or distance measurement.

    ACTIVE COMPENSATION FOR PHASE ALIGNMENT ERRORS IN TIME-OF-FLIGHT CAMERAS
    8.
    发明申请
    ACTIVE COMPENSATION FOR PHASE ALIGNMENT ERRORS IN TIME-OF-FLIGHT CAMERAS 审中-公开
    对飞行时间相机中的相位对准错误的主动补偿

    公开(公告)号：US20160116576A1

    公开(公告)日：2016-04-28

    申请号：US14876392

    申请日：2015-10-06

    Applicant: ANALOG DEVICES, INC.

    Inventor： Erik D. Barnes

    IPC: G01S7/486 ,  H04N5/372 ,  G01S17/10 ,  H04N13/02 ,  G01S17/89 ,  H04N5/232 ,  G06T7/00

    CPC classification number: G01S7/4865 ,  G01S7/484 ,  G01S7/486 ,  G01S7/497 ,  G01S17/10 ,  G01S17/89 ,  G06T2207/10028 ,  G06T2207/30232 ,  H04N5/23222 ,  H04N5/372 ,  H04N13/214

    Abstract: Methods, apparatuses, and systems can be provided to implement active feedback to electrically sense or monitor the illumination and shutter pulses and adjust them actively to maintain the desired phase relationship/difference between the pulses. By maintaining the desired phase difference, the distance calculation can be made more accurate, even when conditions of the time-of-flight camera varies (e.g., temperature, aging, etc.). Advantageously, active compensation can correct for errors ‘on-the-fly’, eliminating detailed characterization and manual adjustment during operation.

    Abstract translation: 可以提供方法，装置和系统以实现主动反馈以电学感测或监视照明和快门脉冲并且主动地调整它们以保持脉冲之间期望的相位关系/差异。 通过保持期望的相位差，即使飞行时间相机的条件变化（例如，温度，老化等），距离计算也可以更准确。 有利的是，主动补偿可以正确校正错误的“即时”，消除操作中的详细表征和手动调整。

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