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    COMPRESSIVE SCANNING LIDAR
    1.
    发明公开
    COMPRESSIVE SCANNING LIDAR 审中-公开

    公开(公告)号：EP3161520A4

    公开(公告)日：2018-03-14

    申请号：EP14896260

    申请日：2014-06-27

    Applicant: HRL LAB LLC

    Inventor： OWECHKO YURI

    IPC: G01S17/66 ,  G01S7/48 ,  G01S7/481 ,  G01S17/32 ,  G01S17/89

    CPC classification number: G01S7/4817 ,  G01S7/4808 ,  G01S17/02 ,  G01S17/325 ,  G01S17/89 ,  H01S5/021 ,  H01S5/0215 ,  H01S5/0262 ,  H01S5/12

    Abstract: A chip-scale scanning lidar includes a two dimensional (2D) scanning micromirror for a transmit beam and a 2D scanning micromirror for a receive beam, a laser diode and a photodetector, a first waveguide and first grating outcoupler coupled to a front facet of the laser diode, a second waveguide and a second grating outcoupler coupled to a rear facet of the laser diode on a substrate. A first fixed micromirror, a second micromirror, a third micromirror, and a focusing component are in a dielectric layer bonded to the substrate over the laser diode and photodetector. The photodetector is optically coupled to the second fixed micromirror and the third fixed micromirror for coherent detection.

    ELECTRO-OPTICAL DISTANCE METER
    4.
    发明公开
    ELECTRO-OPTICAL DISTANCE METER 审中-公开
    电光距离仪表

    公开(公告)号：EP3067714A1

    公开(公告)日：2016-09-14

    申请号：EP16157710.1

    申请日：2016-02-26

    Applicant: Kabushiki Kaisha Topcon

    Inventor： OHTOMO, Fumio ,  KUMAGAI, Kaoru

    IPC: G01S17/36 ,  G01S17/10 ,  G01S7/491

    CPC classification number: G01S17/325 ,  G01S7/4915 ,  G01S7/497 ,  G01S17/102 ,  G01S17/36

    Abstract: The invention provides an electro-optical distance meter, which comprises a light emitting element for emitting a distance measuring light, signal generators for generating two or more proximity frequencies, intermittent pulse generators for generating a modulation signal in which the two or more proximity frequencies are intermitted respectively and converted to pulses with a predetermined width, a projecting optical system for sequentially switching over and projecting intermittent modulated distance measuring light as converted to pulses with predetermined width by the modulation signal, a photodetection unit for receiving a reflected distance measuring light from an object to be measured and producing an intermittent photodetection signal with a predetermined pulse width, other signal generators for generating frequency signals having a difference of a predetermined frequency with respect to the proximity frequency respectively, a frequency converting unit for performing frequency conversion by mixing the intermittent photodetection signals from the photodetection unit to a difference frequency and the frequency signals and for obtaining a signal column of intermittent conversion signals having a predetermined pulse width corresponding to each difference frequency respectively and changing by corresponding to each difference frequency respectively, and an arithmetic control unit, wherein the arithmetic control unit is configured so as to intermit the proximity frequencies so that the pulse width of the intermittent modulated distance measuring light will be shorter than a period of the difference frequency, to calculate difference frequency waveforms with respect to each of the intermittent conversion signals respectively, to calculate a precise measurement distance value by obtaining a phase from a waveform of at least one cycle of the difference frequency, to calculate a coarse measurement distance value by obtaining a phase difference between the relative difference frequencies and to determine a distance by combining the coarse measurement distance value and the precise measurement distance value.

    Abstract translation: 本发明提供了一种电光测距仪，其包括用于发射测距光的发光元件，用于产生两个或更多接近频率的信号发生器，用于产生调制信号的间歇脉冲发生器，其中两个或更多个接近频率是 投影光学系统，用于通过调制信号顺序地切换并投影间歇调制的测距光，所述间歇调制的测距光被转换成具有预定宽度的脉冲;光检测单元，用于接收来自测量单元的反射距离测量光 用于产生具有预定脉冲宽度的间歇光电检测信号的其它信号发生器，用于产生分别相对于接近频率具有预定频率差的频率信号的其他信号发生器，用于执行频率的频率转换单元 通过将来自光电探测单元的间歇光电检测信号混合到差频和频率信号并且分别获得具有分别对应于每个差频的预定脉冲宽度并分别对应于每个差频改变的间歇转换信号的信号列， 以及运算控制单元，其中，所述运算控制单元被配置为中断所述接近频率，使得所述间歇调制的测距光的脉冲宽度将短于所述差频的周期，以计算关于所述差频信号的差分频率波形 对于每个间歇转换信号，分别通过从差频的至少一个周期的波形获得相位来计算精确的测量距离值，以通过获得相对差的相位差来计算粗测量距离值 通过组合粗测量距离值和精确测量距离值来确定距离。

    SYSTEM AND METHOD FOR INCREASING COHERENCE LENGTH IN LIDAR SYSTEMS
    6.
    发明公开
    SYSTEM AND METHOD FOR INCREASING COHERENCE LENGTH IN LIDAR SYSTEMS 审中-公开
    用于增加激光雷达系统中的相干长度的系统和方法

    公开(公告)号：EP2972409A1

    公开(公告)日：2016-01-20

    申请号：EP14769313.9

    申请日：2014-03-12

    Applicant: Digital Signal Corporation

    Inventor： BELSLEY, Kendall, L. ,  SCHULZ, Stephan ,  SEBASTIAN, Richard, L.

    IPC: G01P3/36

    CPC classification number: G01S7/4911 ,  G01J9/00 ,  G01J9/02 ,  G01S7/4915 ,  G01S7/497 ,  G01S17/325 ,  G02B26/06 ,  H01S3/0085 ,  H01S3/10053 ,  H01S3/1307

    Abstract: Various implementations of the invention compensate for "phase wandering" in tunable laser sources. Phase wandering may negatively impact a performance of a lidar system that employ such laser sources, typically by reducing a coherence length/range of the lidar system, an effective bandwidth of the lidar system, a sensitivity of the lidar system, etc. Some implementations of the invention compensate for phase wandering near the laser source and before the output of the laser is directed toward a target. Some implementations of the invention compensate for phase wandering in the target signal (i.e., the output of the laser that is incident on and reflected back from the target). Some implementations of the invention compensate for phase wandering at the laser source and in the target signal.

    Abstract translation: 本发明的各种实施方式补偿可调谐激光源中的“相位漂移”。 通常通过减小激光雷达系统的相干长度/范围，激光雷达系统的有效带宽，激光雷达系统的灵敏度等，相位漂移可能负面地影响采用这种激光源的激光雷达系统的性能。 本发明补偿了激光源附近的相位漂移并且在激光器的输出指向目标之前。 本发明的一些实施方式补偿了目标信号中的相位徘徊（即入射到目标并从目标反射回来的激光的输出）。 本发明的一些实施方式补偿了在激光源处和目标信号中的相位徘徊。

    Modulated laser range finder and method
    7.
    发明公开
    Modulated laser range finder and method 有权
    调制的激光测距仪和方法

    公开(公告)号：EP2728377A3

    公开(公告)日：2014-11-26

    申请号：EP13191142.2

    申请日：2013-10-31

    Applicant: The Boeing Company

    Inventor： Jungwirth, Douglas R.

    IPC: G01S17/32 ,  G01S7/493

    CPC classification number: G01S17/325 ,  G01S7/493

    Abstract: A laser range finder including a laser configured to project a laser beam onto a target object thereby causing a target beam to be reflected from the target object, wherein the laser beam has a frequency, and wherein the frequency is modulated at a known rate, a first beam splitter positioned to split a reference beam from the laser beam, a second beam splitter positioned to receive the target beam and the reference beam, wherein the target beam and the reference beam are coherently combined, the coherently combined beams establishing a difference frequency, and a detector configured to measure the difference frequency.

    Modulated laser range finder and method
    9.
    发明公开
    Modulated laser range finder and method 有权
    调制激光测距仪和方法

    公开(公告)号：EP2728377A2

    公开(公告)日：2014-05-07

    申请号：EP13191142.2

    申请日：2013-10-31

    Applicant: The Boeing Company

    Inventor： Jungwirth, Douglas R.

    IPC: G01S17/32 ,  G01S7/493

    CPC classification number: G01S17/325 ,  G01S7/493

    Abstract: A laser range finder including a laser configured to project a laser beam onto a target object thereby causing a target beam to be reflected from the target object, wherein the laser beam has a frequency, and wherein the frequency is modulated at a known rate, a first beam splitter positioned to split a reference beam from the laser beam, a second beam splitter positioned to receive the target beam and the reference beam, wherein the target beam and the reference beam are coherently combined, the coherently combined beams establishing a difference frequency, and a detector configured to measure the difference frequency.

    Abstract translation: 一种激光测距仪，包括：激光器，被配置为将激光束投射到目标物体上，从而使目标光束从目标物体反射，其中激光束具有频率，并且其中频率以已知速率被调制; 第一分束器，用于分离来自激光束的参考光束;第二分束器，用于接收目标光束和参考光束，其中目标光束和参考光束被相干组合，相干组合光束建立差频， 以及配置成测量差频的检测器。

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