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公开(公告)号：US20210373128A1
公开(公告)日：2021-12-02
申请号：US16886593
申请日：2020-05-28
发明人： Chao Wang , Lingkai Kong , Yonghong Guo , Wenbin Zhu
IPC分类号： G01S7/48 , G01S17/931 , G01S7/481
摘要： Embodiments of the disclosure provide receivers for light detection and ranging (LiDAR). In an example, a receiver includes a beam converging device and an EO beam deflecting unit. The beam converging device is configured to receive a laser beam from an object being scanned by the LiDAR and form an input laser beam. The EO beam deflecting unit is configured to generate a non-uniform medium having at least one of a refractive index gradient or a diffraction grating, receive the input laser beam such that the input laser beam impinges upon the non-uniform medium, and form an output laser beam towards a photosensor. An angle between the input and the output laser beams is nonzero.
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公开(公告)号：US11175385B2
公开(公告)日：2021-11-16
申请号：US16103922
申请日：2018-08-14
发明人： Chao Wang , Youmin Wang , Yue Lu , Lingkai Kong
IPC分类号： G01C3/08 , G01S7/484 , H01S3/23 , H01S3/00 , G02F1/35 , G02F1/355 , G02F1/37 , G01S7/481 , H01S3/067
摘要： Embodiments of the disclosure provide an apparatus for emitting laser light and a system and method for detecting laser light returned from an object. The system includes a transmitter and a receiver. The transmitter includes one or more laser sources, at least one of the laser sources configured to provide a respective native laser beam having a wavelength above 1,100 nm. The transmitter also includes a wavelength converter configured to receive the native laser beams provided by the laser sources and convert the native laser beams into a converted laser beam having a wavelength below 1,100 nm. The transmitter further includes a scanner configured to emit the converted laser beam to the object in a first direction. The receiver is configured to detect a returned laser beam having a wavelength below 1,100 nm and returned from the object in a second direction.
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公开(公告)号：US10962644B1
公开(公告)日：2021-03-30
申请号：US16903248
申请日：2020-06-16
发明人： Lingkai Kong , Yue Lu , Youmin Wang , Chao Wang
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 include adjusting a laser emission scheme to reduce the total power when the value is greater than the predetermined tolerance value.
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公开(公告)号：US11592531B2
公开(公告)日：2023-02-28
申请号：US16897121
申请日：2020-06-09
发明人： Chao Wang , Lingkai Kong , Yonghong Guo , Wenbin Zhu
IPC分类号： G01S7/481 , G01S17/894 , G01S17/10
摘要： Embodiments of the disclosure provide receivers for light detection and ranging (LiDAR). In an example, a receiver includes a beam reflecting unit comprising a plurality of digital micromirror devices (DMDs). The beam reflecting unit is configured to receive an input laser beam returned from an object being scanned by the LiDAR and reflect the input laser beam by at least one DMD selectively switched to an “ON” state at an operation angle to form an output laser beam towards a detector. The detector is configured to receive the output laser beam.
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公开(公告)号：US20230049679A1
公开(公告)日：2023-02-16
申请号：US17393755
申请日：2021-08-04
发明人： Chao Wang , Yonghong Guo , Wenbin Zhu , Lingkai Kong
IPC分类号： G01S7/481 , G01S7/484 , G01S17/931 , G01S7/4911 , G01S7/4863
摘要： In some examples, an apparatus is provided. The apparatus comprises: an illuminator having an adjustable field of view (FOV), the FOV being adjusted based on setting a direction of propagation of light to illuminate the FOV; a light detector; and a controller configured to: control the illuminator to project the light along a first direction of propagation to illuminate a first FOV; control the illuminator to project the light along a second direction of propagation to illuminate a second FOV; detect, using the light detector, reflected light received from the first FOV and the second FOV to generate one or more detection outputs for a combined FOV including the first FOV and the second FOV; and perform at least one of a detection operation or a ranging operation of an object in the combined FOV based on the one or more detection outputs.
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公开(公告)号：US11550033B2
公开(公告)日：2023-01-10
申请号：US16886593
申请日：2020-05-28
发明人： Chao Wang , Lingkai Kong , Yonghong Guo , Wenbin Zhu
IPC分类号： G01S7/48 , G01S7/481 , G01S17/931
摘要： Embodiments of the disclosure provide receivers for light detection and ranging (LiDAR). In an example, a receiver includes a beam converging device and an EO beam deflecting unit. The beam converging device is configured to receive a laser beam from an object being scanned by the LiDAR and form an input laser beam. The EO beam deflecting unit is configured to generate a non-uniform medium having at least one of a refractive index gradient or a diffraction grating, receive the input laser beam such that the input laser beam impinges upon the non-uniform medium, and form an output laser beam towards a photosensor. An angle between the input and the output laser beams is nonzero.
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公开(公告)号：US20210389434A1
公开(公告)日：2021-12-16
申请号：US16898430
申请日：2020-06-10
发明人： Chao Wang , Lingkai Kong , Yonghong Guo , Wenbin Zhu
IPC分类号： G01S7/487 , G01S7/499 , G01S7/4863
摘要： Embodiments of the disclosure provide a receiver in an optical sensing system for receiving a light beam. The receiver includes a first polarizer configured to pass the light beam of a first polarization. The receiver further includes an electro-optical layer coated with patterned transparent electrodes. An electric field is applied to a selected area of the electro-optical layer through the patterned transparent electrodes, and the electro-optical layer changes a portion of the light beam from the first polarization to a second polarization. The receiver also includes a second polarizer configured to selectively pass the portion of the light beam of the second polarization. The receiver additionally includes a detector configured to receive the portion of the light beam output from the second polarizer.
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公开(公告)号：US20210356566A1
公开(公告)日：2021-11-18
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： G01S7/4863 , G01S7/489
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：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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