Patents Examined by Luke D. Ratcliffe
  • Patent number: 11415699
    Abstract: A light detection and ranging (LIDAR) system includes one or more components that include at least one of an electrical circuit, an electro-optical component, or an optical component. The one or more components are configured to receive an optical beam generated by a laser source, split the optical beam into a plurality of optical beams, transmit the plurality of optical beams through a first subset of optical paths. The one or more components are configured to in response to transmitting the plurality of optical beams, receive a reflected beam through a second subset of the optical paths, generate a first output signal based on a first local oscillator (LO) signal and the reflected beam, and generate a second output signal based on a second local oscillator (LO) signal and the reflected beam.
    Type: Grant
    Filed: April 12, 2021
    Date of Patent: August 16, 2022
    Assignee: AURORA OPERATIONS, INC.
    Inventors: Zeb Barber, Stephen Crouch, Emil Kadlec
  • Patent number: 11415695
    Abstract: A Distance Measuring (DM)-system comprising a DM-device comprising a measuring beam unit configured for determining a distance between an object and the DM-device by transmitting a measuring beam, and an Inertial Measurement Unit (IMU) configured for determining an absolute first rotational position of the DM-device with respect to a first axis being parallel to the measuring beam, and an absolute second rotational position of the DM-device with respect to a second axis parallel to the gravity field. The DM-system also includes a computer unit configured for receiving from the DM-device a plurality of measured distance values, an absolute first rotational position of the DM-device at the time of a respective distance measurement, and an absolute second rotational position of the DM-device at the time of a respective distance measurement, and generating a layout by consecutively linking the measured distances based on the plurality of measured distance values.
    Type: Grant
    Filed: February 14, 2019
    Date of Patent: August 16, 2022
    Assignee: LEICA GEOSYSTEMS AG
    Inventors: Johannes Maunz, Patrick Rennhard
  • Patent number: 11415675
    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 field of regard contains all or part of a target located a distance from the lidar system that is less than or equal to a maximum range of the lidar system, and one or more of the emitted pulses of light are scattered by the target. The lidar system also includes a receiver configured to detect at least a portion of the pulses of light scattered by the target. The lidar system further includes a processor configured to determine the distance from the lidar system to the target based at least in part on a round-trip time of flight for an emitted pulse of light.
    Type: Grant
    Filed: October 9, 2018
    Date of Patent: August 16, 2022
    Assignee: Luminar, LLC
    Inventors: Austin K. Russell, Matthew D. Weed, Liam J. McGregor, Jason M. Eichenholz
  • Patent number: 11408980
    Abstract: A light detection and ranging apparatus (LIDAR) includes an optical source to generate an optical beam and one or more waveguides to steer the optical beam. The one or more waveguides include a first cladding layer having a first refractive index and a second cladding layer disposed below the first cladding layer, the second cladding layer having second refractive indexes including a range of different refractive indexes, wherein the range of different refractive indexes is greater than the first refractive index of the first cladding layer.
    Type: Grant
    Filed: December 8, 2021
    Date of Patent: August 9, 2022
    Assignee: Aeva, Inc.
    Inventors: Mazin Alalusi, Pradeep Srinivasan, Kevin Masuda
  • Patent number: 11402475
    Abstract: Embodiments of the present disclosure include techniques for synchronizing certain components within a light scanning system in order to align periodicities and efficiently produce more reliable scan frames. For instance, embodiments include an optical source to transmit an optical beam modulated at a first periodicity, and an optical scanner to direct the optical beam at a second periodicity, and a signal processing system to perform periodic temporal alignments between the first periodicity and the second periodicity to produce stable grid points in region of interest (ROI). The system effectively removes the unaligned grid points and can be applied to any light detection and ranging (LiDAR) systems or other optical scanning applications.
    Type: Grant
    Filed: May 28, 2021
    Date of Patent: August 2, 2022
    Assignee: Aeva, Inc.
    Inventors: Amol V. Gole, Gaylon R. Lovelace
  • Patent number: 11402511
    Abstract: A spectrally-resolved Raman water lidar, including: a transmitter unit, a receiver unit, and a data acquisition and control unit. The transmitter unit includes a seeder, a solid Neodymium-doped Yttrium Aluminum Garnet (Nd:YAG) laser, a beam expander, and a first reflecting mirror to emit a 354.8-nm laser beam. The receiver unit includes a telescope, an iris, a collimator, a second reflecting mirror, a first bandpass filter, a beam splitter, a narrow-band interference filter, a third lens, a first detector, a second bandpass filter, a coupler and a home-made dual-grating polychromator to enable simultaneous profiling of backscattered Raman spectrum signals from water vapor, water droplets and ice crystals as well as aerosol fluorescence in the atmosphere. The data acquisition and control unit includes a computer to store the acquired data and guarantee an automatic operation of the lidar system through a time-sequence circuit.
    Type: Grant
    Filed: October 11, 2018
    Date of Patent: August 2, 2022
    Assignee: WUHAN UNIVERSITY
    Inventors: Fuchao Liu, Fan Yi, Yunpeng Zhang, Changming Yu, Ying Tan, Yujin He, Miao Weng, Yang Yi
  • Patent number: 11397077
    Abstract: The present disclosure is directed to a system and method of controlling a facial recognition process by validating preconditions with a ranging sensor. The ranging sensor transmits a ranging signal that is reflected off of a user's face and received back at the ranging sensor. The received ranging signal can be used to determine distance between the user's face and the mobile device or to determine the reflectivity of the user's face. Comparing the distance to a range of distances corresponding to normal operation of the device or normal reflectivities associated with human skin tones can reduce the number of false positive activations of the facial recognition process. Furthermore, a multiple zone ranging sensor can produce a face depth map that can be compared to a stored face depth map or can produce a reflectivity map that can be compared to a stored face reflectivity map to further increase power efficiency and device security.
    Type: Grant
    Filed: December 18, 2018
    Date of Patent: July 26, 2022
    Assignee: STMICROELECTRONICS, INC.
    Inventors: Arnaud Deleule, John E. Kvam, Kalyan-Kumar Vadlamudi-Reddy
  • Patent number: 11385352
    Abstract: In one embodiment, a method includes emitting, by an automotive vehicle, one or more light beams from a LiDAR system toward an environment surrounding the automotive vehicle, receiving one or more return light beams at the LiDAR system of the automotive vehicle, detecting one or more objects located in the environment surrounding the automotive vehicle based on the return light beams, and simultaneously measuring one or more air characteristics of the environment surrounding the automotive vehicle. The simultaneous detecting of the one or more objects and measuring of the one or more air characteristics may be performed by the LiDAR system. The method may further include sending, by the automotive vehicle, location information to a server associated with vehicle navigation, and sending information of the detected objects and measured air characteristics to the server associated with vehicle navigation, the server configured to update a vehicle-navigation map based on the information.
    Type: Grant
    Filed: July 27, 2018
    Date of Patent: July 12, 2022
    Assignee: Lyft, Inc.
    Inventor: Farzad Cyrus Foroughi Abari
  • Patent number: 11385350
    Abstract: Embodiments herein provide for improved range response in lidar systems. In one embodiment, a lidar system includes a laser, and a detector. First optics direct light from the laser on a beam path along a first optical axis of the first optics. Second optics image the light from the beam path onto a second plane that is substantially normal to the first plane. The second optics have a second optical axis that differs from the first optical axis. The first and the second optical axes lie in a same first plane. A first line in the first plane intersects a second line in the second plane at an acute angle. The first line is perpendicular to the first optical axis. A spatial filter configured in or near the second plane filters the light from the second optics onto the detector.
    Type: Grant
    Filed: February 27, 2018
    Date of Patent: July 12, 2022
    Assignee: Arete Associates
    Inventors: Paul B. Lundquist, Gregory J. Fetzer, Richard Vercillo, Michael Francis Marnon, Thomas Laurence Kraus
  • Patent number: 11381806
    Abstract: There is provided a detection device using a SPAD array including a sensor array, multiple counters, a processor and a frame buffer. The sensor array includes a plurality of SPADs respectively generates an avalanche current while receiving a photon. Each counter counts a number of triggering times of the avalanche current of a corresponding SPAD within an exposure interval. The frame buffer is pre-stored with a plurality of gain calibration values corresponding to every SPAD of the sensor array. The processor accesses the gain calibration values to accordingly calibrate a counting image frame outputted by the sensor array to output a calibrated image frame.
    Type: Grant
    Filed: July 1, 2019
    Date of Patent: July 5, 2022
    Assignee: PIXART IMAGING INC.
    Inventor: Tso-Sheng Tsai
  • Patent number: 11378691
    Abstract: A LIDAR system includes optics that generate a light signal that carries LIDAR data that indicates a distance and/or radial velocity between the optics and an object located outside of the LIDAR system. Electronics are configured to convert the light signal to a first data electrical signal and a second data electrical signal. The electronics perform a Complex Fourier transform on a complex signal such that the first data electrical signals acts a real component of the complex signal and the second data electrical signals acts as an imaginary component of the complex signal. The electronics determine the LIDAR data from an output of the Complex Fourier transform.
    Type: Grant
    Filed: January 25, 2019
    Date of Patent: July 5, 2022
    Assignee: SiLC Technologies, Inc.
    Inventors: Majid Boloorian, Dazeng Feng
  • Patent number: 11372089
    Abstract: Systems and methods for operating an array of micro-mirror assemblies are provided. In one example, an apparatus comprises: a light source; a receiver; and a semiconductor integrated circuit comprising a microelectromechanical system (MEMS) and a controller, the MEMS comprising an array of micro-mirror assemblies, each micro-mirror assembly comprising: a micro-mirror connected to a substrate of the semiconductor integrated circuit via an elastic connection structure and rotatable around the connection structure to perform at least one of: reflect light from the light source along an output projection path, or reflect input light propagating along an input path to the receiver. The controller is configured to generate a control signal to rotate the micro-mirrors based on a target rotation angle and a spring stiffness of one or more connection structures of the array of micro-mirror assemblies.
    Type: Grant
    Filed: October 25, 2019
    Date of Patent: June 28, 2022
    Assignee: Beijing Voyager Technology Co., Ltd.
    Inventors: Youmin Wang, Qin Zhou
  • Patent number: 11372104
    Abstract: Provided are an optical sensing system and an optical apparatus including the same. The optical sensing system may include a light output part configured to emit a laser beam to an object, and a sensing part configured to sense a laser beam emitted from the light output part and reflected from the object. The sensing part may include a photodetector and the active optical device located on an optical path between the photodetector and the object. The active optical device may actively control an orientation of a laser beam passing therethrough and may include a material layer having a refractive index which is changeable by application of an electrical signal.
    Type: Grant
    Filed: September 19, 2018
    Date of Patent: June 28, 2022
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Sunil Kim, Byounglyong Choi, Changgyun Shin
  • Patent number: 11372088
    Abstract: An optical distance meter configured to carry out a distance measurement in a first measuring mode, in which the distance meter is set for distance measurement on a retroreflective target, and a second measuring mode, in which the distance meter is set for distance measurement on a diffusely scattering target. In this case, a first aperture of the receiving channel is set in the first measuring mode, which is smaller than an aperture set in the second measuring mode.
    Type: Grant
    Filed: November 19, 2018
    Date of Patent: June 28, 2022
    Assignee: HEXAGON TECHNOLOGY CENTER GMBH
    Inventors: Simon Bestler, Rainer Wohlgenannt, Jürg Hinderling
  • Patent number: 11366203
    Abstract: An adaptive lag angle compensation scheme for coherent high-speed scanning LiDAR that accommodates diffraction-limited LiDAR beams and also accommodates mixing of return signals with the corresponding local oscillator signals.
    Type: Grant
    Filed: April 16, 2019
    Date of Patent: June 21, 2022
    Assignee: INSIGHT LIDAR, INC.
    Inventors: Christopher Wood, Jason Ensher
  • Patent number: 11366207
    Abstract: A method is accordingly provided for operating an ultrasonic sensor, a plurality of measuring cycles being successively carried out. In each measuring cycle—an electroacoustic transducer of the ultrasonic sensor is excited using an excitation pulse, causing it to mechanically oscillate, as a result of which a measuring signal is transmitted by the transducer, an echo signal is received by the transducer, and a piece of object information is ascertained from the echo signal. The frequency curve of the excitation pulse is differentiated into two measuring cycles successively carried out at least at the end of the frequency curve. The ascertained pieces of object information from at least two measuring cycles are compared with one another and an interference is identified as a function of the result of the comparison.
    Type: Grant
    Filed: October 30, 2017
    Date of Patent: June 21, 2022
    Assignee: Robert Bosch GmbH
    Inventor: Michael Schumann
  • Patent number: 11361573
    Abstract: A system for tracking airborne organisms includes an imager, a backlight source (such as a retroreflective surface) in view of the imager, and a processor configured to analyze one or more images captured by the processor to identify a biological property of an organism.
    Type: Grant
    Filed: April 24, 2019
    Date of Patent: June 14, 2022
    Assignee: TOKITAE LLC
    Inventors: Roderick A. Hyde, Eric Johanson, Jordin T. Kare, Artyom Makagon, Emma Rae Mullen, Nathan P. Myhrvold, Thomas J. Nugent, Jr., Nathan John Pegram, Nels R. Peterson, Phillip Rutschman, Lowell L. Wood, Jr.
  • Patent number: 11353563
    Abstract: There is provided an object detection device including a light source, an avalanche diode, a first counter, a second counter and a processor. The light source emits light within a first interval, and is turned off within a second interval, a third interval and a fourth interval. The avalanche diode detects photons corresponding to the first interval, second, third and fourth intervals to trigger avalanche events. The first counter performs up-counting on the avalanche events in the first interval and performs down-counting on the avalanche events in the third interval to generate a first count value. The second counter performs up-counting on the avalanche events in the second interval and performs down-counting on the avalanche events in the fourth interval to generate a second count value. The processor calculates a time-of-flight according to the first count value and the second count value.
    Type: Grant
    Filed: September 13, 2018
    Date of Patent: June 7, 2022
    Assignee: PIXART IMAGING INC.
    Inventor: Tso-Sheng Tsai
  • Patent number: 11353588
    Abstract: The present disclosure relates to systems and methods that provide information about a scene based on a time-of-flight (ToF) sensor and a structured light pattern. In an example embodiment, a sensor system could include at least one ToF sensor configured to receive light from a scene. The sensor system could also include at least one light source configured to emit a structured light pattern and a controller that carries out operations. The operations include causing the at least one light source to illuminate at least a portion of the scene with the structured light pattern and causing the at least one ToF sensor to provide information indicative of a depth map of the scene based on the structured light pattern.
    Type: Grant
    Filed: November 1, 2018
    Date of Patent: June 7, 2022
    Assignee: Waymo LLC
    Inventors: Caner Onal, David Schleuning, Brendan Hermalyn, Simon Verghese, Alex Mccauley, Brandyn White, Ury Zhilinsky
  • Patent number: 11353589
    Abstract: A system align point clouds obtained by sensors of a vehicle using kinematic iterative closest point with integrated motions estimates. The system receives lidar scans from a lidar mounted on the vehicle. The system derives point clouds from the lidar scan data. The system iteratively determines velocity parameters that minimize an aggregate measure of distance between corresponding points of the plurality of pairs of points. The system iteratively improves the velocity parameters. The system uses the velocity parameters for various purposes including for building high definition maps used for navigating the vehicle.
    Type: Grant
    Filed: November 16, 2018
    Date of Patent: June 7, 2022
    Assignee: NVIDIA CORPORATION
    Inventors: Gregory William Coombe, Chen Chen, Derik Schroeter, Jeffrey Minoru Adachi, Mark Damon Wheeler