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1.发明申请公开(公告)号：US20170356987A1
公开(公告)日：2017-12-14
申请号：US15405665
申请日：2017-01-13
Applicant: Digital Signal Corporation
Inventor： Stephan Schulz , Hani Daniel
IPC: G01S7/491
CPC classification number: G01S7/4917
Abstract: A laser radar, or “lidar” system, employs an asymmetric single-ended detector to detect received signals reflected back from targets. The asymmetric single-ended detector benefits from a reduced part count and fewer optical splices while nearly achieving a same gain as a symmetric differential detector.
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2.发明授权公开(公告)号：US10197765B2
公开(公告)日：2019-02-05
申请号：US15581081
申请日：2017-04-28
Applicant: Digital Signal Corporation
Inventor： Stephan Schulz
Abstract: According to various implementations of the invention, a system for controlling a controlled device includes a lidar configured to direct at least one beam toward a target; a first controlled device, wherein the at least one beam is directed toward the target via the first controlled device; and a control system configured to control a position of the first controlled device, where the control system includes an open loop controller and a closed loop controller. The open loop controller is configured to receive a desired trajectory command signal, and generate an open loop drive signal based on the desired trajectory command signal. The closed loop controller is configured to receive an actual position signal of the first controlled device, and generate a closed loop drive signal based on the actual position signal and a control signal derived from the command signal, where the control signal accounts for group delays associated with one or more control system components. A combined drive signal is generated by combining the open loop drive signal and the closed loop drive signal. The combined drive signal is provided to control the position of the first controlled device.
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3.发明申请公开(公告)号：US20180074286A1
公开(公告)日：2018-03-15
申请号：US15581081
申请日：2017-04-28
Applicant: Digital Signal Corporation
Inventor： Stephan Schulz
CPC classification number: G02B7/182 , G01S7/4812 , G01S7/4817 , G01S7/497 , G01S17/023
Abstract: A control system structure is provided that improves system bandwidth without affecting optimization for other performance criteria (such as, suppressing loop disturbances, or other optimization criteria) and stability of a closed-loop system.
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4.发明申请公开(公告)号：US20140268290A1
公开(公告)日：2014-09-18
申请号：US13843089
申请日：2013-03-15
Applicant: DIGITAL SIGNAL CORPORATION
Inventor： RICHARD L. SEBASTIAN , Kendall L. Belsley , Stephan Schulz
IPC: G02B26/06
CPC classification number: G02B26/06 , G01S7/4911 , G01S7/497 , G01S17/325 , H01S3/005 , 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: 本发明的各种实现补偿了可调谐激光源中的“相位漂移”。 相位漂移可能会对使用这种激光源的激光雷达系统的性能产生负面影响，通常通过降低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。 本发明补偿激光源附近的相位漂移，并且在激光器的输出被指向目标之前。 本发明的一些实施方式补偿目标信号中的相位漂移（即，入射并从目标反射回来的激光器的输出）。 本发明的一些实施方式补偿了激光源和目标信号中的相位漂移。
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5.发明授权System and method for using combining couplers with asymmetric split ratios in a lidar system 有权在激光雷达系统中使用具有不对称分流比的组合耦合器的系统和方法公开(公告)号：US09547074B2
公开(公告)日：2017-01-17
申请号：US14249085
申请日：2014-04-09
Applicant: Digital Signal Corporation
Inventor： Stephan Schulz , Hani Daniel
IPC: G01S7/491
CPC classification number: G01S7/4917
Abstract: A laser radar, or “lidar” system, employs an asymmetric single-ended detector to detect received signals reflected back from targets. The asymmetric single-ended detector benefits from a reduced part count and fewer optical splices while nearly achieving a same gain as a symmetric differential detector.
Abstract translation: 激光雷达或“激光雷达”系统采用非对称单端检测器来检测从目标反射回来的接收信号。 非对称单端检测器受益于减少的部件数量和更少的光接头，同时几乎获得与对称差分检测器相同的增益。
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Patent Agency Ranking
6.发明申请SYSTEM AND METHOD FOR USING COMBINING COUPLERS WITH ASYMMETRIC SPLIT RATIOS IN A LIDAR SYSTEM 有权在激光雷达系统中使用不对称分离比例的组合耦合器的系统和方法公开(公告)号：US20150293211A1
公开(公告)日：2015-10-15
申请号：US14249085
申请日：2014-04-09
Applicant: Digital Signal Corporation
Inventor： Stephan Schulz , Hani Daniel
IPC: G01S7/487
CPC classification number: G01S7/4917
Abstract: A laser radar, or “lidar” system, employs an asymmetric single-ended detector to detect received signals reflected back from targets. The asymmetric single-ended detector benefits from a reduced part count and fewer optical splices while nearly achieving a same gain as a symmetric differential detector.
Abstract translation: 激光雷达或“激光雷达”系统采用非对称单端检测器来检测从目标反射回来的接收信号。 非对称单端检测器受益于减少的部件数量和更少的光接头，同时几乎获得与对称差分检测器相同的增益。
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公开(公告)号：US09081090B2
公开(公告)日：2015-07-14
申请号：US13843227
申请日：2013-03-15
Applicant: Digital Signal Corporation
Inventor： Richard L. Sebastian , Kendall L. Belsley , Stephan Schulz
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: 本发明的各种实现补偿了可调谐激光源中的“相位漂移”。 相位漂移可能会对使用这种激光源的激光雷达系统的性能产生负面影响，通常通过降低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。 本发明补偿激光源附近的相位漂移，并且在激光器的输出被指向目标之前。 本发明的一些实施方式补偿目标信号中的相位漂移（即，入射并从目标反射回来的激光器的输出）。 本发明的一些实施方式补偿了激光源和目标信号中的相位漂移。
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公开(公告)号：US20170343672A1
公开(公告)日：2017-11-30
申请号：US15405411
申请日：2017-01-13
Applicant: Digital Signal Corporation
Inventor： Hani Daniel , Stephan Schulz
IPC: G01S17/10
CPC classification number: G01S17/102 , G01S7/4815 , G01S7/4818 , G01S7/4917 , G01S17/325 , G01S17/58
Abstract: A lidar comprises a first laser source configured to generate a first laser output at a first frequency and a second laser source configured to generate a second laser output at a second frequency, wherein the first frequency is different from the second frequency. A combining coupler combines the first laser output and the second laser output into a combined output. The combined output is carried by an optical fiber to a fiber tip where the combined output is transmitted as a transmit signal toward a target. A reflected portion of the transmit signal reflected back from a point on the target is received. A mixing coupler mixes the received reflected portion of the transmit signal with a second portion of the combined output and outputs a mixed signal. A wavelength filter separates the mixed signal into a first mixed signal corresponding to the first frequency of the first laser source and a second mixed signal corresponding to the second frequency of the second laser source. A first detector detects the first mixed signal, and a second detector mixed the second received signal. The detected first mixed signal and the detected second mixed signal may be used to determine a range and a Doppler velocity of the point on the target.
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9.发明申请公开(公告)号：US20160161601A1
公开(公告)日：2016-06-09
申请号：US14795059
申请日：2015-07-09
Applicant: Digital Signal Corporation
Inventor： Richard L. Sebastian , Kendall L. Belsley , Stephan Schulz
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: 本发明的各种实现补偿了可调谐激光源中的“相位漂移”。 相位漂移可能会对使用这种激光源的激光雷达系统的性能产生负面影响，通常通过降低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。 本发明补偿激光源附近的相位漂移，并且在激光器的输出被指向目标之前。 本发明的一些实施方式补偿目标信号中的相位漂移（即，入射并从目标反射回来的激光器的输出）。 本发明的一些实施方式补偿了激光源和目标信号中的相位漂移。
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公开(公告)号：US20140269790A1
公开(公告)日：2014-09-18
申请号：US13843227
申请日：2013-03-15
Applicant: DIGITAL SIGNAL CORPORATION
Inventor： RICHARD L. SEBASTIAN , Kendall L. Belsley , Stephan Schulz
IPC: H01S3/10
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.
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