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公开(公告)号：US11982765B2
公开(公告)日：2024-05-14
申请号：US17165017
申请日：2021-02-02
申请人： Microvision, Inc.
摘要： The embodiments described herein provide systems and methods that can facilitate increased detector sensitivity and reliability in a scanning laser device. Specifically, the systems and methods utilize detectors with multiple sensors that are configured to receive reflections of laser light pulses from objects within a scan field. These multiple sensors are configured to receive these reflections through the same optical assembly used to scan the laser light pulses out to the scan field. Furthermore, the multiple sensors are configured to at least partially cancel the effects of back reflections from within the optical assembly itself. The cancellation of the effects of back reflections from within the optical assembly can improve the sensitivity of the detector, particularly for the detection of low energy reflections of laser pulses from within the scan field.
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公开(公告)号：US11579256B2
公开(公告)日：2023-02-14
申请号：US16508821
申请日：2019-07-11
申请人： Microvision, Inc.
IPC分类号： G01S7/481 , G01S7/4863 , G01S7/484 , G01S7/48
摘要： A light detection and ranging system includes synchronously scanning transmit and receive mirrors that scan a pulsed fanned laser beam in two dimensions. Imaging optics image a receive aperture onto an arrayed receiver that includes a plurality of light sensitive devices. A phase offset may be injected into a scanning trajectory to mitigate effects of interfering light sources.
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公开(公告)号：US20200379090A1
公开(公告)日：2020-12-03
申请号：US16426920
申请日：2019-05-30
申请人： Microvision, Inc.
摘要： A light detection and ranging system includes synchronously scanning transmit and receive mirrors that scan a pulsed fanned laser beam in two dimensions. Imaging optics image a receive aperture onto an arrayed receiver that includes a plurality of light sensitive devices. Scanning mirror offsets may be applied to modify a fan angle of the pulsed fanned laser beam. Adaptive methods dynamically modify the size and location of the field of view, laser pulse properties, and/or fan angle in response to internal and external sensors data.
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公开(公告)号：US20240192376A1
公开(公告)日：2024-06-13
申请号：US18063429
申请日：2022-12-08
申请人： Microvision, Inc.
IPC分类号： G01S17/931 , G01S7/4861 , G01S17/08
CPC分类号： G01S17/931 , G01S7/4861 , G01S17/08
摘要： The embodiments described herein provide systems and methods that can improve performance in scanning laser devices. Specifically, the systems and methods emit first emission control pulse sets that are used to detect when objects (e.g., persons) are within a relatively close first safety range. Then second emission control pulses to detect when objects are within a second safety range. Then, higher energy long-range pulse sets are conditionally emitted only when objects were not detected within the first and second safety ranges with the first and second emission control pulse sets. The use of first and second emission control pulse sets can provide for improved reliability of nearby object detections, while still meeting the energy limits needed for eye safety.
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公开(公告)号：US11754682B2
公开(公告)日：2023-09-12
申请号：US16426920
申请日：2019-05-30
申请人： Microvision, Inc.
IPC分类号： G01S7/481 , G01S7/4865 , G01S17/89 , G01S17/931 , G01S17/10 , G01S7/48 , G01S13/42
CPC分类号： G01S7/4817 , G01S7/4802 , G01S7/4815 , G01S7/4865 , G01S13/426 , G01S17/10 , G01S17/89 , G01S17/931
摘要： A light detection and ranging system includes synchronously scanning transmit and receive mirrors that scan a pulsed fanned laser beam in two dimensions. Imaging optics image a receive aperture onto an arrayed receiver that includes a plurality of light sensitive devices. Scanning mirror offsets may be applied to modify a fan angle of the pulsed fanned laser beam. Adaptive methods dynamically modify the size and location of the field of view, laser pulse properties, and/or fan angle in response to internal and external sensors data.
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公开(公告)号：US11796643B2
公开(公告)日：2023-10-24
申请号：US16426852
申请日：2019-05-30
申请人： Microvision, Inc.
CPC分类号： G01S7/4817 , G01S7/4811 , G01S17/10
摘要： A light detection and ranging system includes synchronously scanning transmit and receive mirrors that scan a pulsed fanned laser beam in two dimensions. Imaging optics image a receive aperture onto an arrayed receiver that includes a plurality of light sensitive devices. Adaptive methods dynamically modify the size and location of the field of view as well as laser pulse properties in response to internal and external sensors data.
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公开(公告)号：US11579427B2
公开(公告)日：2023-02-14
申请号：US16160167
申请日：2018-10-15
申请人： Microvision, Inc.
摘要： A non-imaging concentrator is employed in an upside down configuration in which light enters a smaller aperture and exits a larger aperture. The input angle of light rays may be as large as 180 degrees, while the maximum exit angle is limited to the acceptance angle of the non-imaging concentrator. A dichroic filter placed at the larger aperture has a maximum angle of incidence equal to the acceptance angle of the non-imaging concentrator.
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公开(公告)号：US20200379092A1
公开(公告)日：2020-12-03
申请号：US16426889
申请日：2019-05-30
申请人： Microvision, Inc.
摘要： A light detection and ranging system includes synchronously scanning transmit and receive mirrors that scan a pulsed fanned laser beam in two dimensions. Imaging optics image a receive aperture onto an arrayed receiver that includes a plurality of light sensitive devices. Adaptive methods dynamically modify the size and location of the field of view as well as laser pulse properties in response to internal and external sensors data.
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公开(公告)号：US11828881B2
公开(公告)日：2023-11-28
申请号：US16426889
申请日：2019-05-30
申请人： Microvision, Inc.
IPC分类号： G01S7/4863 , G01S7/481 , G01S17/931 , G01S17/93 , G02B6/35
CPC分类号： G01S7/4863 , G01S7/4811 , G01S7/4817 , G01S17/931 , G02B6/3518 , G01S17/93
摘要： A light detection and ranging system includes synchronously scanning transmit and receive mirrors that scan a pulsed fanned laser beam in two dimensions. Imaging optics image a receive aperture onto an arrayed receiver that includes a plurality of light sensitive devices. Adaptive methods dynamically modify the size and location of the field of view as well as laser pulse properties in response to internal and external sensors data.
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10.发明申请公开(公告)号：US20220390569A1
公开(公告)日：2022-12-08
申请号：US17303606
申请日：2021-06-03
申请人： Microvision, Inc.
摘要： The embodiments described herein provide systems and methods that can improve performance in scanning laser devices. Specifically, the systems and methods utilize a non-uniform variation in optical expansion coupled with variation in the energy level of laser light pulses to provide an improved effective range over a scanning area. In general, the improved effective range varies over the scan field, with relatively long effective range in some areas of the scan field and relatively short effective range in other areas of the scan field. This varying range over the scan field is facilitated by expansion optics that provide a non-uniform variation in optical expansion for laser light pulses relative to position along a first axis in the scan field and by a light source controller that varies the energy level of the laser light pulses according to position along the first axis of the scan field.
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