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公开(公告)号：US11619717B2
公开(公告)日：2023-04-04
申请号：US16874935
申请日：2020-05-15
发明人： Chao Wang , Lingkai Kong , Yonghong Guo , Wenbin Zhu
IPC分类号： G01S7/489 , G01S17/931 , G01S7/4863
摘要： Embodiments of the disclosure provide a receiver in an optical sensing system. The exemplary receiver includes a movable detector configured to receive optical signals reflected or scattered from an object scanned by the optical sensing system. The receiver further includes an actuator configured to move the movable detector. The receiver also includes a controller configured to determine a plurality of target positions of the movable detector for receiving the optical signals. The controller is further configured to control the actuator to move the movable detector to the plurality target positions according to a movement pattern.
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公开(公告)号：US11506756B2
公开(公告)日：2022-11-22
申请号：US16922465
申请日：2020-07-07
发明人： Chao Wang , Lingkai Kong , Yonghong Guo , Wenbin Zhu
IPC分类号： G01S7/481 , G02B26/08 , G01S7/484 , G01S17/89 , G01S17/931
摘要： Embodiments of the disclosure provide receivers for light detection and ranging (LiDAR). In an example, a receiver includes a beam reflecting unit having a plurality of digital micromirror devices (DMDs). The beam reflecting unit is configured to receive an input light beam returned from an object being scanned by the LiDAR, reflect a signal in the input light beam by at least one first DMD selectively switched to an “ON” state at an operation angle to form an output signal towards a detector, reflect a noise signal in the input light beam away from the detector by at least one second DMD selectively switched to an “OFF” state at a non-operation angle. The receiver also includes the detector configured to receive the output signal.
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公开(公告)号：US20220146630A1
公开(公告)日：2022-05-12
申请号：US17092992
申请日：2020-11-09
发明人： Chao Wang , Wenbin Zhu , Yonghong Guo , Lingkai Kong
摘要： Embodiments of the disclosure provide a light detection and ranging (LiDAR) system. In an example, the LiDAR system includes a laser source, a scanner, a beam deflecting unit, and a controller. The laser source is configured to emit a laser beam towards an object. The scanner is configured to receive a returned laser beam from the object, and deflect the returned laser beam towards a beam deflecting unit to form a first laser beam traveling along a first direction. The first direction deviates from a reference direction by a deviation angle. The beam deflecting unit is configured to receive the first laser beam, and deflect the first laser beam to form a second laser beam towards a photosensor. The controller is configured to dynamically control a deflection angle of the beam deflecting unit to cause the second laser beam to be deflected towards the photosensor to compensate the deviation angle.
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公开(公告)号：US20210349244A1
公开(公告)日：2021-11-11
申请号：US17381076
申请日：2021-07-20
发明人： Youmin Wang , Yonghong Guo , Chao Wang , Yue Lu , Lingkai Kong
摘要： Embodiments of the disclosure provide transmitters for light detection and ranging (LiDAR). The transmitter includes a plurality of laser sources and a light modulator. Each of the laser sources includes interleaved emitting regions and gaps and is configured to provide a native laser beam in a respective incident direction. The light modulator is configured to receive the native laser beams from the plurality of laser sources in different incident directions and combine the native laser beams into a combined laser beam in a diffraction direction.
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公开(公告)号：US11119195B2
公开(公告)日：2021-09-14
申请号：US16387500
申请日：2019-04-17
发明人： Youmin Wang , Lingkai Kong , Yue Lu , Yonghong Guo , Chao Wang , Qin Zhou
IPC分类号： G01S7/481 , G02B26/10 , G02B26/08 , G01S17/08 , G01S17/931
摘要： Embodiments of the disclosure provide a Light Detection and Ranging (LiDAR) system that includes a light source configured to emit a light beam, a first apparatus configured to adjust the light beam and a second apparatus configured to adjust the light beam and receive the reflected light beam from the first apparatus and an object. The first apparatus includes a first rotatable mirror configured to receive and reflect the light beam, and a first actuator configured to rotate the first rotatable mirror. The second apparatus includes a second adjustable mirror configured to receive and propagate the light beam, and a second actuator configured to adjust the second adjustable mirror, and a detector configured to receive the light beam reflected by objects.
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公开(公告)号：US20210050708A1
公开(公告)日：2021-02-18
申请号：US17088463
申请日：2020-11-03
发明人： Yibo Yu , Yue Lu , Vipul Chawla , Zhenghan Zhu , Lingkai Kong
摘要： A system for controlling a pulsed laser diode includes a power source configured to supply power to the pulsed laser diode and at least one driving branch between the power source and the pulsed laser diode. The at least one driving branch is configured to control power delivery from the power source to the pulsed laser diode. The at least one driving branch is connected to a cathode of the pulsed laser diode.
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公开(公告)号：US10830877B1
公开(公告)日：2020-11-10
申请号：US16920647
申请日：2020-07-03
发明人： Vipul Chawla , Yue Lu , Lingkai Kong
IPC分类号： H03F3/45 , G01S7/4863
摘要： An optical signal detection system includes a plurality of photodetectors configured to detect optical signals reflected from an environment surrounding the optical signal detection system and convert the optical signals into electrical signals. The optical signal detection system also includes an amplifier coupled to the plurality of photodetectors. The amplifier is shared by the plurality of photodetectors and configured to generate an output signal by amplifying an individual electrical signal converted by a corresponding photodetector. The optical signal detection system further includes a multiplexing circuit configured to selectively establish a connection between one of the plurality of photodetectors and the amplifier to amply the electrical signal converted by that photodetector.
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公开(公告)号：US20200292672A1
公开(公告)日：2020-09-17
申请号：US16891547
申请日：2020-06-03
发明人： Youmin Wang , Lingkai Kong
IPC分类号： G01S7/481 , G01S17/894 , G02B27/30 , G02B5/09
摘要： Embodiments of the disclosure provide a Light Detection and Ranging system. The system may include a light source configured to emit a light beam, a first apparatus configured to adjust the light beam and a second apparatus configured to adjust the light beam and receive the reflected light beam from a first rotatable mirror. The first apparatus may include the first rotatable mirror configured to receive and reflect the light beam, and a first actuator configured to rotate the first rotatable mirror. The second apparatus may include a second adjustable mirror configured to receive and propagate the light beam, a second actuator configured to adjust the second adjustable mirror, and a detector configured to receive the light beam reflected by the object. The first rotatable mirror is further configured to receive and reflect the light beam reflected by the object to the detector.
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公开(公告)号：US12055663B2
公开(公告)日：2024-08-06
申请号：US17965757
申请日：2022-10-13
发明人： Chao Wang , Lingkai Kong , Yonghong Guo , Wenbin Zhu
IPC分类号： G01S7/486 , G01S7/48 , G01S7/481 , G01S17/931
CPC分类号： G01S7/486 , G01S7/4804 , G01S7/4813 , G01S17/931
摘要： Embodiments of the disclosure provide receivers for light detection and ranging (LiDAR). In an example, a receiver includes an acousto-optical (AO) beam deflecting unit configured to receive an input laser beam and a controller configured to cause an acoustic signal to be applied to the AO beam deflecting unit to deflect the input laser beam for a deflection angle and form an output laser beam towards a beam sensor. The deflection angle between the input and the output laser beams is nonzero.
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公开(公告)号：US11675075B2
公开(公告)日：2023-06-13
申请号：US16653969
申请日：2019-10-15
发明人： Lingkai Kong , Yue Lu , Youmin Wang , Chao Wang
CPC分类号： G01S17/08 , G01S7/484 , G01S7/4808 , H01S3/0085
摘要： Embodiments of the disclosure provide a system for controlling power of laser lights emitted by an optical sensing device. The system includes at least one storage device configured to store instructions and at least one processor communicatively coupled to the at least one storage device and configured to execute the instructions to perform operations. The operations include detecting an object within a field of view of the optical sensing device based on a reflected laser signal received by the optical sensing device, determining a distance of the object from the optical sensing device, determining a value indicating a total power of one or more laser beams to be incident on an aperture at the distance, and comparing the value with a predetermined tolerance value. The operations also includes adjusting a laser emission scheme to reduce the total power when the value is greater than the predetermined tolerance value.
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