Patents by Inventor Scott R. Campbell

Scott R. Campbell has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Publication number: 20220291353
    Abstract: In one embodiment, a lidar system includes a light source configured to emit pulses of light and a scanner configured to scan at least a portion of the emitted pulses of light along a scan pattern contained within an adjustable field of regard. The scanner includes a first scanning mirror configured to scan the portion of the emitted pulses of light substantially parallel to a first scan axis to produce multiple scan lines of the scan pattern. The scanner also includes a second scanning mirror configured to distribute the scan lines along a second scan axis, where the scan lines are distributed within the adjustable field of regard according to an adjustable second-axis scan profile that includes a minimum scan angle along the second scan axis, a maximum scan angle along the second scan axis, and a scan-line distribution.
    Type: Application
    Filed: May 25, 2022
    Publication date: September 15, 2022
    Inventors: Scott R. Campbell, Matthew D. Weed, Lane A. Martin, Jason M. Eichenholz, Austin K. Russell
  • Patent number: 11428444
    Abstract: A heat transfer system is disclosed in which, an electrocaloric material includes a copolymer of a monomer mixture including (i) vinylidene fluoride, (ii) an addition polymerization monomer selected from tetrafluoroethylene, trifluoroethylene, or a monomer smaller than trifluoroethylene, and (iii) a halogenated addition polymerization monomer different than (ii) that is larger than vinylidene fluoride. The electrocaloric material also includes an additive selected from a nucleating agent having a polar surface charge, electrocalorically active solid particles, or a combination thereof. Electrodes are disposed on opposite surfaces of the electrocaloric material, and an electric power source is configured to provide voltage to the electrodes. The system also includes a first thermal flow path between the electrocaloric material and a heat sink, and a second thermal flow path between the electrocaloric material and a heat source.
    Type: Grant
    Filed: June 27, 2016
    Date of Patent: August 30, 2022
    Assignee: CARRIER CORPORATION
    Inventors: Scott Alan Eastman, Joseph V. Mantese, Wei Xie, Subramanyaravi Annapragada, Parmesh Verma, Sergei F. Burlatsky, Wayde R. Schmidt, Treese Hugener-Campbell
  • Patent number: 11415677
    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.
    Type: Grant
    Filed: April 19, 2019
    Date of Patent: August 16, 2022
    Assignee: Luminar, LLC
    Inventors: Matthew D. Weed, Scott R. Campbell, Lane A. Martin, Jason M. Eichenholz, Austin K. Russell
  • Patent number: 11378666
    Abstract: A lidar system includes a light source, a scanner, and a receiver and is configured to detect remote targets located up to RMAX meters away. The receiver includes a detector with a field of view larger than the light-source field of view. The scanner causes the detector field of view to move relative to the instantaneous light-source field of view along the scan direction, so that (i) when a pulse of light is emitted, the instantaneous light-source field of view is approximately centered within the detector field of view, and (ii) when a scattered pulse of light returns from a target located RMAX meters away, the instantaneous light-source field of view is located near an edge of the field of view of the detector and is contained within the field of view of the detector.
    Type: Grant
    Filed: April 29, 2020
    Date of Patent: July 5, 2022
    Assignee: Luminar, LLC
    Inventors: Scott R. Campbell, Lane A. Martin, Matthew D. Weed, Jason M. Eichenholz
  • Patent number: 11353559
    Abstract: In one embodiment, a lidar system includes a light source configured to emit pulses of light and a scanner configured to scan at least a portion of the emitted pulses of light along a scan pattern contained within an adjustable field of regard. The scanner includes a first scanning mirror configured to scan the portion of the emitted pulses of light substantially parallel to a first scan axis to produce multiple scan lines of the scan pattern, where each scan line is oriented substantially parallel to the first scan axis. The scanner also includes a second scanning mirror configured to distribute the scan lines along a second scan axis that is substantially orthogonal to the first scan axis, where the scan lines are distributed within the adjustable field of regard according to an adjustable second-axis scan profile.
    Type: Grant
    Filed: October 9, 2018
    Date of Patent: June 7, 2022
    Assignee: Luminar, LLC
    Inventors: Scott R. Campbell, Matthew D. Weed, Lane A. Martin, Jason M. Eichenholz, Austin K. Russell
  • Patent number: 11181622
    Abstract: A lidar system includes a light source configured to emit light pulses and a receiver configured to detect light from some of the light pulses scattered by remote targets. The receiver includes an avalanche photodiode operating in the linear mode for detecting the light pulses. To prevent damage to the linear mode avalanche photodiode a quench circuit is coupled to the avalanche photodiode, where the quench circuit reduces a bias voltage applied to the avalanche photodiode, when an avalanche event occurs at the avalanche photodiode.
    Type: Grant
    Filed: March 29, 2018
    Date of Patent: November 23, 2021
    Assignee: Luminar, LLC
    Inventors: Joseph G. LaChapelle, Scott R. Campbell, Stephen D. Gaalema
  • Patent number: 11119198
    Abstract: A light-based detection system includes a light source configured to emit light as a series of one or more light pulses, a transmitter configured to direct the one or more light pulses toward a remote target located a distance from the system, a receiver configured to detect a light pulse scattered by the remote target, and a controller. The pulses are at a wavelength between approximately 1400 nanometers and approximately 1600 nanometers, with pulse duration between 10 picoseconds and 20 nanoseconds and a pulse energy less than 2 microjoules. The controller is configured to determine the distance from the system to the target based on a time of flight for the detected light pulse, detect a fault condition indicating that the distance to the target is less than a threshold distance, and shut down the light source in response to detecting the fault condition.
    Type: Grant
    Filed: March 28, 2018
    Date of Patent: September 14, 2021
    Assignee: Luminar, LLC
    Inventors: Scott R. Campbell, Jason M. Eichenholz
  • Patent number: 11022688
    Abstract: A lidar system operating in a vehicle comprising a first eye configured to scan a first field of regard and a second eye configured to scan a second field of regard. Each of the first eye and the second eye includes a respective optical element configured to output a beam of light, a respective scan mirror configured to scan the beam of light along a vertical dimension of the respective field of regard, and a respective receiver configured to detect scattered light from the beam of light. The field of regard of the lidar system includes the first field of regard and the second field of regard, combined along a horizontal dimension of the first field of regard and the second field of regard.
    Type: Grant
    Filed: April 2, 2018
    Date of Patent: June 1, 2021
    Assignee: Luminar, LLC
    Inventors: Jason M. Eichenholz, Scott R. Campbell, Matthew D. Weed, Lane A. Martin
  • Patent number: 10983213
    Abstract: A lidar system includes one or more light sources configured to emit light pulses, a scanner configured to direct the emitted light pulses as beams along one or more scan directions to illuminate, for each orientation of the scanner with each of the plurality of beams, a respective light-source field of view corresponding to a respective pixel, and a receiver configured to detect the light pulses scattered by one or more remote targets. The receiver includes a first, second, and third detectors to detect light pulses associated with respective beams. Each detector has a separate detector field of view within which the detector receives scattered light. A spatial separation between the first detector and the second detector is greater than a spatial separation between the second detector and the third detector.
    Type: Grant
    Filed: March 29, 2018
    Date of Patent: April 20, 2021
    Assignee: Luminar Holdco, LLC
    Inventors: Jason M. Eichenholz, Scott R. Campbell, Joseph G. LaChapelle
  • Patent number: 10976417
    Abstract: A lidar system comprises a light source configured to emit pulses of light, a scanner configured to direct the pulses of light along a scan direction, where each of the pulses of light illuminates a respective field of view of the light source, and a receiver configured to detect the pulses of light scattered by remote targets. The receiver includes a low-gain detector associated with a low gain and a high-gain detector associated with a high gain. The low-gain detector is positioned so that a first scattered pulse of light that returns from a first target, located closer to the receiver than a second target, is detected primarily by the low-gain detector, and a second scattered pulse of light that returns from the second target is detected primarily by the high-gain detector.
    Type: Grant
    Filed: March 29, 2018
    Date of Patent: April 13, 2021
    Assignee: Luminar Holdco, LLC
    Inventors: Joseph G. LaChapelle, Scott R. Campbell, Jason M. Eichenholz, Matthew D. Weed
  • Patent number: 10969488
    Abstract: A lidar system includes a light source configured to emit a beam of light including a sequence of pulses, a scanner configured to scan, using the sequence of pulses, a field of regard of the lidar system along a horizontal dimension and a vertical dimension in accordance with a first scan pattern; a receiver configured to detect light from at least some of the pulses scattered by one or more remote targets to generate an array of pixels, based on the sequence of pulses of the beam of light. The lidar system is further configured to modify the first scan pattern in view of a result of processing the generated array of pixels to generate a second scan pattern, and scan the field of regard using the sequence of pulses along the horizontal dimension and the vertical dimension in accordance with the second scan pattern.
    Type: Grant
    Filed: March 29, 2018
    Date of Patent: April 6, 2021
    Assignee: Luminar Holdco, LLC
    Inventor: Scott R. Campbell
  • Publication number: 20200284906
    Abstract: A lidar system includes one or more light sources configured to generate a first beam of light and a second beam of light, a scanner configured to scan the first and second beams of light across a field of regard of the lidar system, and a receiver configured to detect the first beam of light and the second beam of light scattered by one or more remote targets. The scanner includes a rotatable polygon mirror that includes multiple reflective surfaces angularly offset from one another along a periphery of the polygon mirror, the reflective surfaces configured to reflect the first and second beams of light to produce a series of scan lines as the polygon mirror rotates. The scanner also includes a pivotable scan mirror configured to (i) reflect the first and second beams of light and (ii) pivot to distribute the scan lines across the field of regard.
    Type: Application
    Filed: May 20, 2020
    Publication date: September 10, 2020
    Inventors: Jason M. Eichenholz, Scott R. Campbell, John E. McWhirter, Matthew D. Weed, Lane A. Martin
  • Publication number: 20200256964
    Abstract: A lidar system includes a light source, a scanner, and a receiver and is configured to detect remote targets located up to RMAX meters away. The receiver includes a detector with a field of view larger than the light-source field of view. The scanner causes the detector field of view to move relative to the instantaneous light-source field of view along the scan direction, so that (i) when a pulse of light is emitted, the instantaneous light-source field of view is approximately centered within the detector field of view, and (ii) when a scattered pulse of light returns from a target located RMAX meters away, the instantaneous light-source field of view is located near an edge of the field of view of the detector and is contained within the field of view of the detector.
    Type: Application
    Filed: April 29, 2020
    Publication date: August 13, 2020
    Inventors: Scott R. Campbell, Lane A. Martin, Matthew D. Weed, Jason M. Eichenholz
  • Publication number: 20200191963
    Abstract: A lidar system includes a transmitter that encodes successive transmit pulses with different pulse characteristics and a receiver that detects the pulse characteristics of each received (scattered or reflected) pulse and that distinguishes between the received pulses based on the detected pulse characteristics. The lidar system thus resolves range ambiguities by encoding pulses of scan positions in the same or different scan periods to have different pulse characteristics, such as different pulse widths or different pulse envelope shapes. The receiver includes a pulse decoder configured to detect the relevant pulse characteristics of the received pulse and a resolver that determines if the pulse characteristics of the received pulse matches the pulse characteristics of the current scan position or that of a previous scan position.
    Type: Application
    Filed: January 27, 2020
    Publication date: June 18, 2020
    Inventors: Scott R. Campbell, Joseph G. LaChapelle, Jason M. Eichenholz, Austin K. Russell
  • Patent number: 10684360
    Abstract: A lidar system includes a light source configured to emit pulses of light, a scanner configured to direct the pulses of light along a scan direction, and a receiver with a detector configured to detect the pulses of light scattered by remote targets. For a pulse of light emitted by the light source, the receiver is configured to detect the scattered pulse of light returning to the receiver during a ranging time interval between (i) when the pulse of light leaves the lidar system and (ii) when the scattered pulse of light returns from a remote target positioned at a maximum distance RMAX. For at least a portion of the ranging time interval, the lidar system directs the scattered pulse of light toward the active region of the detector at an oblique angle to reduce an amount of light impinging on the active region.
    Type: Grant
    Filed: September 22, 2017
    Date of Patent: June 16, 2020
    Assignee: Luminar Technologies, Inc.
    Inventor: Scott R. Campbell
  • Patent number: 10641874
    Abstract: A lidar system includes a light source, a scanner, and a receiver and is configured to detect remote targets located up to RMAX meters away. The receiver includes a detector with a field of view larger than the light-source field of view. The scanner causes the detector field of view to move relative to the instantaneous light-source field of view along the scan direction, so that (i) when a pulse of light is emitted, the instantaneous light-source field of view is approximately centered within the detector field of view, and (ii) when a scattered pulse of light returns from a target located RMAX meters away, the instantaneous light-source field of view is located near an edge of the field of view of the detector and is contained within the field of view of the detector.
    Type: Grant
    Filed: September 20, 2017
    Date of Patent: May 5, 2020
    Assignee: Luminar Technologies, Inc.
    Inventors: Scott R. Campbell, Lane A. Martin, Matthew D. Weed, Jason M. Eichenholz
  • Patent number: 10627495
    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.
    Type: Grant
    Filed: November 9, 2018
    Date of Patent: April 21, 2020
    Assignee: Luminar Technologies, Inc.
    Inventors: Stephen D. Gaalema, Austin K. Russell, Joseph G. LaChapelle, Scott R. Campbell, Jason M. Eichenholz, Tue Tran
  • Patent number: 10571567
    Abstract: A lidar system comprises a light source configured to emit light, a scanner configured to direct the emitted light to scan a field of regard of the lidar system in accordance with a scan pattern, a receiver configured to detect the light scattered by one or more remote targets, and a controller configured to control motion of at least the second mirror to modify the scan pattern. The scanner includes a rotatable polygon mirror having a block having a first wall, a second wall, and reflective surfaces extending between the first and second walls, the reflective surfaces being angularly offset from one another along a periphery of the block. The scanner also includes a polygon mirror axle extending into the block through at least one of the first and second walls, about which the block rotates, and a second mirror pivotable along an axis orthogonal to the polygon mirror axle.
    Type: Grant
    Filed: April 27, 2018
    Date of Patent: February 25, 2020
    Assignee: Luminar Technologies, Inc.
    Inventors: Scott R. Campbell, Jason M. Eichenholz, Austin K. Russell, John G. Hughes
  • Patent number: 10557940
    Abstract: In one embodiment, a lidar system includes a light source configured to emit pulses of light and a scanner configured to scan at least a portion of the emitted pulses of light across a field of regard. The lidar system also includes a receiver configured to detect at least a portion of the scanned pulses of light scattered by a target located a distance from the lidar system.
    Type: Grant
    Filed: November 29, 2016
    Date of Patent: February 11, 2020
    Assignee: Luminar Technologies, Inc.
    Inventors: Jason M. Eichenholz, Austin K. Russell, Scott R. Campbell, Alain Villeneuve, Rodger W. Cleye, Joseph G. LaChapelle, Matthew D. Weed, Lane A. Martin, Stephen D. Gaalema
  • Patent number: 10557939
    Abstract: A lidar system with improved signal-to-noise ratio in the presence of solar background noise. The lidar system can comprise a light source to emit light toward a target. The light source can have an operating wavelength which lies within a band that delineates a relative maximum in atmospheric absorption. The lidar system can also include a detector to detect scattered light from the target and a processor to determine a characteristic of the target based on a characteristic of the scattered light received at the detector.
    Type: Grant
    Filed: October 18, 2016
    Date of Patent: February 11, 2020
    Assignee: Luminar Technologies, Inc.
    Inventors: Scott R. Campbell, Jason M. Eichenholz, Matthew D. Weed