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公开(公告)号：US10591601B2
公开(公告)日：2020-03-17
申请号：US16031815
申请日：2018-07-10
Applicant: Luminar Technologies, Inc.
Inventor： Richmond Hicks , Matthew D. Weed , Jason M. Eichenholz
Abstract: A machine vision system comprises a camera configured to generate one or more images of a field of regard of the camera, a lidar system, and a processor. The lidar system includes a laser configured to emit light, where the emitted light is directed toward a region within the field of regard of the camera and a receiver configured to detect light returned from the emitted light. The processor is configured to receive an indication of a location based on the returned light and determine whether a solid object is present at the location based on the one or more images.
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公开(公告)号：US10401480B1
公开(公告)日：2019-09-03
申请号：US16210704
申请日：2018-12-05
Applicant: Luminar Technologies, Inc.
Inventor： Stephen D. Gaalema , Mark A. Drummer , Stephen L. Mielke , Jason M. Eichenholz
Abstract: In one embodiment, a lidar system includes a light source configured to emit multiple optical signals directed into a field of regard of the lidar system. The optical signals include a first optical signal and a second optical signal, where the second optical signal is emitted a particular time interval after the first optical signal is emitted. The lidar system also includes a receiver configured to detect a received optical signal that includes a portion of the emitted first or second optical signal that is scattered by a target located a distance from the lidar system. The received optical signal is detected after the second optical signal is emitted. The receiver includes a first detector configured to detect a first portion of the received optical signal and a second detector configured to detect a second portion of the received optical signal.
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公开(公告)号：US20190221988A1
公开(公告)日：2019-07-18
申请号：US16273736
申请日：2019-02-12
Applicant: Luminar Technologies, Inc.
Inventor： Alain Villeneuve , Jason M. Eichenholz , Laurance S. Lingvay
IPC: H01S3/094 , H01S3/00 , G02B27/10 , G01S7/48 , H01S5/00 , G02B27/09 , H01S3/08 , H01S3/067 , G01S7/486 , G01S17/10 , H01S3/13 , G02B26/10 , G01S17/42 , G01S7/481 , G01S7/484 , G01S7/497 , H01S3/23 , H01S5/40
Abstract: In one embodiment, a laser system includes a seed laser diode configured to produce a free-space seed-laser beam and a seed-laser focusing lens configured to focus the seed-laser beam. The laser system also includes a semiconductor optical amplifier (SOA) that includes a front facet, a back facet, and a waveguide extending from the front facet to the back facet. The SOA is configured to: receive, at the front facet, light from the focused seed-laser beam; amplify the received light as the received light propagates along the SOA waveguide from the front facet to the back facet; and emit, from the back facet, an amplified free-space beam that includes the amplified received light. The laser system further includes a mounting platform, where one or more of the seed laser diode, the seed-laser focusing lens, and the SOA are mechanically attached to the mounting platform.
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公开(公告)号：US10267899B2
公开(公告)日：2019-04-23
申请号：US15876662
申请日：2018-01-22
Applicant: LUMINAR TECHNOLOGIES, INC.
Inventor： Matthew D. Weed , Scott R. Campbell , Lane A. Martin , Jason M. Eichenholz , Austin K. Russell
Abstract: To compensate for the uneven distribution of data points around the periphery of a vehicle in a lidar system, a light source transmits light pulses at a variable pulse rate according to the orientation of the light pulses with respect to the lidar system. A controller may communicate with a scanner in the lidar system that provides the orientations of the light pulses to the controller. The controller may then provide a control signal to the light source adjusting the pulse rate based on the orientations of the light pulses. For example, the pulse rate may be slower near the front of the lidar system and faster near the periphery. In another example, the pulse rate may be faster near the front of the lidar system and slower near the periphery.
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公开(公告)号：US10241198B2
公开(公告)日：2019-03-26
申请号：US15828195
申请日：2017-11-30
Applicant: LUMINAR TECHNOLOGIES, INC.
Inventor： Joseph G. LaChapelle , Rodger W. Cleye , Scott R. Campbell , Jason M. Eichenholz
Abstract: A method for calibrating lidar systems operating in vehicles includes detecting a triggering event, causing the lidar system to not emit light during a calibration period, determining an amount of noise measured by the lidar system during the calibration period, generating a noise level metric based on the amount of noise detected during the calibration period, and adjusting subsequent readings of the lidar system using the noise level metric. The adjusting includes measuring energy levels of return light pulses emitted from the lidar system and scattered by targets and offsetting the measured energy levels by the noise level metric.
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Patent Agency Ranking
公开(公告)号：US10209359B2
公开(公告)日：2019-02-19
申请号：US15845552
申请日：2017-12-18
Applicant: LUMINAR TECHNOLOGIES, INC.
Inventor： Austin K. Russell , Matthew D. Weed , Liam J. McGregor , Lane A. Martin , Jason M. Eichenholz
Abstract: To increase the effective pulse rate of a light source in a lidar system, a controller provides control signals to the light source to transmit a light pulse once the previous light pulse has been received. The controller may communicate with a receiver in the lidar system that detects received light signals. In response to detecting a received light signal, the receiver may provide an indication of the received light signal to the controller which may in turn provide a control signal to the light source to transmit the next light pulse. The receiver may also provide characteristics of the received light signal to the controller, such as the peak power for the received light signal, the average power for the received light signal, the pulse duration of the received light signal, etc. Then the controller may analyze the characteristics to determine whether to transmit another light pulse.
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公开(公告)号：US10114111B2
公开(公告)日：2018-10-30
申请号：US15824416
申请日：2017-11-28
Applicant: LUMINAR TECHNOLOGIES, INC.
Inventor： Austin K. Russell , Jason M. Eichenholz , Laurance S. Lingvay
Abstract: To dynamically control power in a lidar system, a controller identifies a triggering event and provides a control signal to a light source in the lidar system adjusting the power of light pulses provided by the light pulse. Triggering events may include exceeding a threshold speed, being within a threshold distance of a person or other object, an atmospheric condition, etc. In some scenarios, the power is adjusted to address eye-safety concerns.
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公开(公告)号：US20180299534A1
公开(公告)日：2018-10-18
申请号：US15954427
申请日：2018-04-16
Applicant: LUMINAR TECHNOLOGIES, INC.
Inventor： Joseph G. LaChapelle , Jason M. Eichenholz
Abstract: A system includes a lidar, a camera, and a controller communicatively coupled to the camera and the lidar. The lidar includes a laser configured to emit pulses of light, a scanner configured to direct the emitted pulses in accordance with a scan pattern, and a receiver configured to detect the emitted pulse of light scattered by one or more remote targets to collect a set of lidar pixels of a scan frame, in a sequence defined by the scan pattern. The camera has a field of regard that at least partially overlaps the field of regard of the lidar. The controller is configured to cause the camera to capture images while the receiver of the lidar module collects the complete set of lidar pixels of the scan frame, and align lidar pixels with corresponding pixels in the captured images.
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公开(公告)号：US20180284277A1
公开(公告)日：2018-10-04
申请号：US15843652
申请日：2017-12-15
Applicant: LUMINAR TECHNOLOGIES,INC.
Inventor： Joseph G. LaChapelle , Jason M. Eichenholz , Laurance S. Lingvay
CPC classification number: G01S17/102 , G01S7/4812 , G01S7/4814 , G01S7/4816 , G01S7/4817 , G01S7/484 , G01S7/4865 , G01S17/10 , G01S17/36 , G01S17/42 , G01S17/87 , G01S17/89 , G01S17/936
Abstract: A light source includes a laser configured to emit a ranging pulse including a sequence of fast pulses. A lidar system uses one or more properties of the sequence of fast pulses to determine a signature of the ranging pulse. A receiver includes a detector element configured to detect a light signal and a signature detection circuitry configured to determine whether the detected light signal corresponds to the signature of the emitted ranging pulse. The lidar system is configured to generate a pixel value based on the detected light signal if the detected light signal corresponds to the signature of the emitted ranging pulse.
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公开(公告)号：US20180284231A1
公开(公告)日：2018-10-04
申请号：US15861147
申请日：2018-01-03
Applicant: Luminar Technologies, Inc.
Inventor： Austin K. Russell , Joseph G. LaChapelle , Scott R. Campbell , Jason M. Eichenholz
CPC classification number: G01S7/489 , G01S7/4863 , G01S7/4865 , G01S17/10
Abstract: To decrease the likelihood of a false detection when detecting light from light pulses scattered by remote targets in a lidar system, a receiver in the lidar system includes a photodetector and a pulse-detection circuit having a gain circuit with a varying amount of gain over time. The gain circuit operates in a low-gain mode for a time period T1 beginning with time t0 when a light pulse is emitted to prevent the receiver from detecting return light pulses during the threshold time period T1. Upon expiration of the threshold time period T1, the gain circuit operates in a high-gain mode to begin detecting return light pulses until a subsequent light pulse is emitted.
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