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公开(公告)号：US11604280B2
公开(公告)日：2023-03-14
申请号：US16753314
申请日：2018-10-02
IPC分类号： G01S17/34
摘要： Examples of FMCW laser radar systems and methods described herein may segment the processing of a broader bandwidth frequency chirp into multiple shorter-duration (e.g., lower bandwidth) frequency chirps. This segmentation may have the benefits in some examples of improving the measurement duty cycle and range resolution, and/or allowing for more flexible processing, and/or enabling improved detection of more distant objects.
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公开(公告)号：US20220082495A1
公开(公告)日：2022-03-17
申请号：US17419708
申请日：2020-01-15
摘要： Apparatuses, systems, and methods for open path laser spectroscopy with mobile platforms. An example system may include a first mobile platform and a second mobile platform, each of which supports a payload. A light beam directed from one payload to another may define a measurement path, which may be at a particular height above the ground. The payloads may determine a gas concentration along the measurement path. Wind information at the measurement height may be used to determine a gas flux. One or both of the mobile platforms may then move to a new location, and take a measurement along a new measurement path. By combining the measurement paths, gas flux through a flux surface may be determined.
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3.发明申请公开(公告)号：US20200278432A1
公开(公告)日：2020-09-03
申请号：US16650816
申请日：2018-09-25
IPC分类号： G01S7/4912 , G01S17/34 , G01S7/4913
摘要： Examples are provided that use multiple analog-to-digital converters (ADCs) to disambiguate FMCW ladar range returns from one or more targets that may be greater than the Nyquist frequencies of one or more of the ADCs. Examples are also provided that use a first and a second laser FMCW return signal (e.g., reflected beam) in combination with two or more ADCs to disambiguate one or more target ranges (e.g., distances to one or more objects).
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公开(公告)号：US20210190953A1
公开(公告)日：2021-06-24
申请号：US16756408
申请日：2018-10-17
摘要： Embodiments of the disclosure are drawn to apparatuses and methods for a rotating optical reflector. Optical systems may have a limited field of view, and so in order to expand the area that the optical system collects data from, the field of view of the optical system may be scanned across a target area. The present disclosure is directed to a rotating optical reflector, which includes a transmissive layer which refracts light onto a reflective layer, which has a normal which is not parallel to the axis about which the optical reflector is rotated. The optical reflector may be both statically and dynamically balanced, which may allow an increased size of the optical reflector, which in turn may increase the aperture of an optical system (e.g., a lidar system) using the rotating optical reflector.
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公开(公告)号：US20200011994A1
公开(公告)日：2020-01-09
申请号：US16494207
申请日：2018-03-16
发明人： Michael James Thorpe , Jason Kenneth Brasseur , Peter Aaron Roos , Nathan Joseph Greenfield , Aaron Thomas Kreitinger
摘要： Methods and apparatuses are described for frequency-modulated continuous-wave (FMCW) light detection and ranging (LiDAR). Examples are provided where high-closed-loop bandwidth, active feedback applied to laser frequency chirps may provide increases in the free-running laser coherence length for long-range FMCW distance measurements. Examples are provided that use an asymmetric sideband generator within an active feedback loop for higher closed-loop bandwidth. Examples of using a single shared reference interferometer within multiple active feedback loops that may be used for increasing the coherence length of multiple chirped lasers are described. Example calibrators are also described.
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公开(公告)号：US11592563B2
公开(公告)日：2023-02-28
申请号：US16756408
申请日：2018-10-17
摘要： Embodiments of the disclosure are drawn to apparatuses and methods for a rotating optical reflector. Optical systems may have a limited field of view, and so in order to expand the area that the optical system collects data from, the field of view of the optical system may be scanned across a target area. The present disclosure is directed to a rotating optical reflector, which includes a transmissive layer which refracts light onto a reflective layer, which has a normal which is not parallel to the axis about which the optical reflector is rotated. The optical reflector may be both statically and dynamically balanced, which may allow an increased size of the optical reflector, which in turn may increase the aperture of an optical system (e.g., a lidar system) using the rotating optical reflector.
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公开(公告)号：US11422258B2
公开(公告)日：2022-08-23
申请号：US16494207
申请日：2018-03-16
发明人： Michael James Thorpe , Jason Kenneth Brasseur , Peter Aaron Roos , Nathan Joseph Greenfield , Aaron Thomas Kreitinger
IPC分类号： G01C3/00 , G01S17/34 , G01S7/4911 , G01S7/4912 , G01S7/497
摘要： Methods and apparatuses are described for frequency-modulated continuous-wave (FMCW) light detection and ranging (LiDAR). Examples are provided where high-closed-loop bandwidth, active feedback applied to laser frequency chirps may provide increases in the free-running laser coherence length for long-range FMCW distance measurements. Examples are provided that use an asymmetric sideband generator within an active feedback loop for higher closed-loop bandwidth. Examples of using a single shared reference interferometer within multiple active feedback loops that may be used for increasing the coherence length of multiple chirped lasers are described. Example calibrators are also described.
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8.发明授权公开(公告)号：US11422244B2
公开(公告)日：2022-08-23
申请号：US16650816
申请日：2018-09-25
IPC分类号： G01C3/08 , G01S7/4912 , G01S17/34 , G01S7/4913
摘要： Examples are provided that use multiple analog-to-digital converters (ADCs) to disambiguate FMCW ladar range returns from one or more targets that may be greater than the Nyquist frequencies of one or more of the ADCs. Examples are also provided that use a first and a second laser FMCW return signal (e.g., reflected beam) in combination with two or more ADCs to disambiguate one or more target ranges (e.g., distances to one or more objects).
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9.发明申请公开(公告)号：US20200241139A1
公开(公告)日：2020-07-30
申请号：US16753314
申请日：2018-10-02
摘要： Examples of FMCW laser radar systems and methods described herein may segment the processing of a broader bandwidth frequency chirp into multiple shorter-duration (e.g., lower bandwidth) frequency chirps. This segmentation may have the benefits in some examples of improving the measurement duty cycle and range resolution, and/or allowing for more flexible processing, and/or enabling improved detection of more distant objects.
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