Of Pulse Transit Time Patents (Class 356/5.01)
  • Patent number: 10775175
    Abstract: A dead reckoning system for dismounted users is disclosed. The system uses a laser emitter to heat fixed points near the user. The points are ranged via LIDAR and imaged via thermal or IR imagers co-aligned with the laser emitter and LIDAR assembly (e.g., as a wearable personal system or a vehicle-based system). The system includes inertial sensors (e.g., accelerometers, gyrometers) to monitor attitude and motion trends of the system. Thermal images incorporating the heated points are captured at new user positions. The dead reckoning system includes a microcontroller for tracking distance and directional changes from one user position to the next by analyzing successive thermal images to determine changes in the position of the fixed heated points relative to the user.
    Type: Grant
    Filed: June 28, 2019
    Date of Patent: September 15, 2020
    Assignee: ROCKWELL COLLINS, INC.
    Inventors: John G. Bendickson, William J. Croghan, Mitchell A. Riley
  • Patent number: 10775502
    Abstract: A distance-measuring apparatus, a mobile object, a robot, a three-dimensional measuring device, a surveillance camera, and a distance-measuring method. The distance-measuring apparatus, a mobile object includes a light source to emit light, an imaging element to receive and photoelectrically convert the light into a plurality of electrical signals, and to obtain the electrical signals upon being sorted into a plurality of phase signals, and a computing unit to calculate distance to the object based on the phase signals. In the distance-measuring apparatus, a period of time during which the imaging element obtains the phase signals is different from a light emitting period of the light source in length. The distance-measuring method includes determining whether or not aliasing is present based on a light emitting period of the light source, a period of time during which the plurality of phase signals are obtained, and a result of the calculating.
    Type: Grant
    Filed: November 9, 2017
    Date of Patent: September 15, 2020
    Assignee: RICOH COMPANY, LTD
    Inventors: Yoichi Ichikawa, Hiroaki Tanaka, Shu Takahashi, Masahiro Itoh, Yasuhiro Nihei, Takeshi Ogawa, Toshishige Fujii
  • Patent number: 10771993
    Abstract: The subject of the invention is a method for determining a quality of at least one mobile communications network in an air corridor (8), which method comprises: an unmanned aerial vehicle (1) comprising a mobile communications receiver (3) configured to determine the quality of the at least one mobile communications network, and comprising a positioning device (4) configured to determine a position of the unmanned aerial vehicle (1) in the air corridor (8), and comprises the steps: arranging a plurality of radio-based control devices (2) along a ground path (6) corresponding to a linear path (7) in the air corridor (8), each of said control devices (2) being configured to control the unmanned aerial vehicle (1) through the air corridor (8) and being spaced apart from one another on the ground (5), such that the unmanned aerial vehicle (1) when flying the linear path (7) at no position is farther than in visual contact range (9) from at least one of the control devices (2); flying the unmanned aerial vehicle (
    Type: Grant
    Filed: December 7, 2018
    Date of Patent: September 8, 2020
    Assignee: P3 Communications GmbH
    Inventor: Marc Peter Althoff
  • Patent number: 10763290
    Abstract: Embodiments include a LIDAR scanning system. A laser is configured to emit pulses of light. A transmit reconfigurable-metasurface is configured to reflect an incident pulse of light as an illumination beam pointing at a field of view. This pointing is responsive to a first holographic beam steering pattern implemented in the transmit reconfigurable-metasurface. A receive reconfigurable-metasurface is configured to reflect a return of the illumination beam to an optical detector. This pointing is responsive to a second holographic beam steering pattern implemented in the receiving reconfigurable-metasurface. An optical detector includes an array of detector pixels. Each detector pixel includes (i) a photodetector configured to detect light in the return of the illumination beam and (ii) a timing circuit configured to determine a time of flight of the detected light. The optical detector is also configured to output a detection signal indicative of the detected light and the time of flight.
    Type: Grant
    Filed: October 23, 2017
    Date of Patent: September 1, 2020
    Assignee: Elwha LLC
    Inventors: Gleb M. Akselrod, Erik E. Josberger, Mark C. Weidman
  • Patent number: 10761185
    Abstract: A signal processing device for processing a signal of a reflected wave which is a wave reflected in a medium and is received by a receiver, when a wave propagating through the medium is continuously transmitted by a transmitter. The signal processing device includes: an estimation unit configured to estimate a lower limit distance of a detection distance range for which an intensity level of a scattered wave from the medium in the detection distance range is equal to or smaller than an allowable level; and a scattering reduction unit configured to remove, from a signal of the reflected wave received, a signal of the scattered wave from the medium in a masking region from the receiver to the lower limit distance to perform output.
    Type: Grant
    Filed: February 18, 2016
    Date of Patent: September 1, 2020
    Assignee: NEC CORPORATION
    Inventor: Hisashi Shiba
  • Patent number: 10761210
    Abstract: Systems and methods for determining ranges to a target disposed behind a transparent surface are described. A target acquisition system receives a plurality of lidar returns, at least some of which are from a target and at least some of which are from a transparent surface. The lidar returns correspond to a portion of a lidar signal generated by a lidar, directed toward the target, and reflected back to the lidar from either the target or the transparent surface. A range measurement for each of the plurality of lidar returns is determined. The target acquisition system generates a histogram of the range measurements. The histogram includes an array including a plurality of range bins. Each range bin defines a unique portion of a predetermined distance out from the lidar. The histogram further includes a count associated with each respective range bin.
    Type: Grant
    Filed: November 27, 2017
    Date of Patent: September 1, 2020
    Assignee: StereoVision Imaging, Inc.
    Inventors: Humayun Chaudhry, Christopher Thompson
  • Patent number: 10761191
    Abstract: Embodiments of the disclosure provide a LiDAR assembly. The LiDAR assembly includes a central LiDAR device configured to detect an object at or beyond a first predetermined distance from the LiDAR system and an even number of multiple auxiliary LiDAR devices configured to detect an object at or within a second predetermined distance from the LiDAR system. The LiDAR assembly also includes a mounting apparatus configured to mount the central and auxiliary LiDAR devices. Each of the central and auxiliary LiDAR devices is mounted to the mounting apparatus via a mounting surface. A first mounting surface between the central LiDAR device and the mounting apparatus has an angle with a second mounting surface between one of the auxiliary LiDAR devices and the mounting apparatus.
    Type: Grant
    Filed: October 9, 2019
    Date of Patent: September 1, 2020
    Assignee: SUTENG INNOVATION TECHNOLOGY CO., LTD.
    Inventors: Chunxin Qiu, Letian Liu
  • Patent number: 10761197
    Abstract: A sensor arrangement for determining time-of-flight comprises an emitter configured to periodically emit pulses of electromagnetic radiation depending on a first clock signal, a photonic demodulator configured to detect electromagnetic radiation during detection intervals comprising first and second intervals and a processing circuit. A timing of the detection intervals is defined by a second clock signal having a phase difference with respect to the first clock signal. The demodulator is configured to generate demodulator signals depending on energy of the radiation detected during at least one of the first intervals and at least one of the second intervals, respectively. The processing circuit is configured to adapt the phase difference based on the demodulator signals and to generate an output signal indicative of the time-of-flight based on the phase difference.
    Type: Grant
    Filed: November 14, 2016
    Date of Patent: September 1, 2020
    Assignee: ams AG
    Inventor: Kerry Glover
  • Patent number: 10754031
    Abstract: The present application provides a power control method, applied in a distance measuring module comprising a light emitting unit. The power control method comprises steps of the light emitting unit emitting an incident light by a first emitting power in a first time; receiving a reflected light corresponding to the incident light; determining a distance between the distance measuring module and a target according to the reflected light; and adjusting an emitting power of the light emitting unit according to the distance.
    Type: Grant
    Filed: January 12, 2018
    Date of Patent: August 25, 2020
    Assignee: Shenzhen Goodix Technology Co., Ltd.
    Inventors: Shengchun Chueh, Mengta Yang
  • Patent number: 10754140
    Abstract: Certain embodiments pertain to parallel digital imaging acquisition and restoration methods and systems.
    Type: Grant
    Filed: November 2, 2018
    Date of Patent: August 25, 2020
    Assignee: California Institute of Technology
    Inventors: Chi Shing Chan, Changhuei Yang
  • Patent number: 10746858
    Abstract: A LIDAR calibration system can detect a first set of return signals from a plurality of fiducial targets in a calibration facility for a lower set of laser scanners of the LIDAR module. The LIDAR calibration system can also detect a second set of return signals from one or more planar surfaces associated with a calibration trigger location on a road network for an upper set of laser scanners of the LIDAR module. Based on the first and second sets of return signals, the LIDAR calibration system can generate a set of calibration transforms to adjust a set of intrinsic parameters of the LIDAR module.
    Type: Grant
    Filed: August 17, 2017
    Date of Patent: August 18, 2020
    Assignee: UATC, LLC
    Inventors: David McAllister Bradley, Gehua Yang
  • Patent number: 10739462
    Abstract: In one embodiment, an apparatus includes a transmitter operable to transmit a first light beam from a light source. The apparatus also includes a receiver operable to receive a plurality of return light beams and direct the plurality of return light beams through a first beam splitter to an imaging sensor and a LiDAR sensor. The imaging sensor may be operable to process a first portion of the return light beams into image profile data, and the LiDAR sensor may be operable to process a second portion of the return light beams into depth profile data. In addition, the first and second portions of the return light beams may be received from a shared field of view.
    Type: Grant
    Filed: May 25, 2018
    Date of Patent: August 11, 2020
    Assignee: Lyft, Inc.
    Inventors: Farzad Cyrus Foroughi Abari, Romain Clément
  • Patent number: 10725155
    Abstract: The present invention relates to a method for measuring the distance of targets in the surroundings by way of a time-of-flight measurement of pulses, in particular laser pulses, reflected at said targets, said pulses each being successively emitted at a transmission time in accordance with a predeterminable pulse repetition rate and said pulses, after the reflection thereof, each being received at a reception time, said method comprising the following steps: selecting a first pulse repetition rate from a set of at least two different pulse repetition rates and predetermining the selected pulse repetition rate for the emission, ascertaining a transmission time lying closest in time to the reception time of a reflected pulse and a time interval between these, and, if the ascertained time interval drops below a predetermined first threshold, selecting a second pulse repetition rate from the set and predetermining the second pulse repetition rate for the emission.
    Type: Grant
    Filed: June 14, 2016
    Date of Patent: July 28, 2020
    Assignee: RIEGL LASER MEASUREMENT SYSTEMS GMBH
    Inventors: Peter Rieger, Andreas Ullrich
  • Patent number: 10725154
    Abstract: A method and system for imaging in degraded visual environments. The system includes a laser that is positioned to transmit a Gaussian beam toward a target object located within the degraded visual environment. An optical receiver is positioned to receive return signals. A helical phase element is positioned between the target object and the optical receiver. The return signals pass through the helical phase element. The helical phase element separates coherent and incoherent light by imparting orbital angular momentum on the coherent returns to form an optical vortex.
    Type: Grant
    Filed: March 16, 2018
    Date of Patent: July 28, 2020
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventors: Brandon Cochenour, Lila Rodgers, Alan Edward Laux, Linda Mullen
  • Patent number: 10705192
    Abstract: Optoelectronic modules (100) are operable to distinguish between signals indicative of reflections from an object of interest and signals indicative of a spurious reflection. Various modules are operable to recognize spurious reflections by means of dedicated spurious-reflection detection pixels (126) and, in some cases, also to compensate for errors caused by spurious reflections.
    Type: Grant
    Filed: March 13, 2015
    Date of Patent: July 7, 2020
    Assignee: ams Sensors Singapore Pte. Ltd.
    Inventors: Jens Kubacki, Jim Lewis, Miguel Bruno Vaello Paños, Michael Lehmann, Stephan Beer, Bernhard Buettgen, Daniel Pérez Calero, Bassam Hallal
  • Patent number: 10706272
    Abstract: A method includes extracting a plurality of feature points from a first image and a second image of an image-capture target, acquiring, from the second image, for each of the plurality of feature points in the first image, a set of points having a correlation with the feature point, identifying, for each of the plurality of feature points in the second image, a position of a center of gravity of the set of points, and determining an amount of movement of the image-capture target by performing weighting processing, the weighting processing being performed on each of amounts of displacements and a number of points in the set of points acquired for each of the plurality of feature points, each of the amounts of displacements being a displacement from a position of each of the plurality of feature points in the first image to the position of the center of gravity.
    Type: Grant
    Filed: March 1, 2018
    Date of Patent: July 7, 2020
    Assignee: FUJITSU LIMITED
    Inventors: Norihiro Kakuko, Shanshan Yu, Takeshi Otani
  • Patent number: 10708484
    Abstract: Time-of-flight cameras may be synchronized where the fields of view of the time-of-flight cameras overlap. The time-of-flight cameras may be programmed within intervals of time for illuminating their respective fields of view that do not conflict with one another. When a first time-of-flight camera illuminates a first field of view that overlaps with a second field of view of a second time-of-flight camera, and the second time-of-flight camera detects reflected light from the illumination, the second time-of-flight camera may determine a time to illuminate the second field of view based on the reflected light. A time-of-flight camera may include an image sensor modified to include one or more modulated light sensors among an array of photoreceptors. A modulation frequency or illumination interval may be selected for the time-of-flight camera based on modulation frequencies or illumination intervals of other cameras, as determined based on data captured by the modulated light sensors.
    Type: Grant
    Filed: November 5, 2018
    Date of Patent: July 7, 2020
    Assignee: Amazon Technologies, Inc.
    Inventor: Gabor Becker
  • Patent number: 10705213
    Abstract: An optical apparatus includes a photosensitive element, a lens and a microstructure unit. The microstructure unit is arranged between the photosensitive element and the lens. After plural light beams passing through the lens are received by the microstructure unit, travelling directions of the plural light beams are changed. Consequently, at least a portion of the plural light beams is guided to the photosensitive element. In such way, the light collecting efficacy of the photosensitive element is enhanced.
    Type: Grant
    Filed: January 3, 2019
    Date of Patent: July 7, 2020
    Assignee: EVERREADY PRECISION IND. CORP.
    Inventors: Jyh-Long Chern, Chih-Ming Yen
  • Patent number: 10705212
    Abstract: An optical sensor includes a time difference extraction circuit for extracting a time difference based on the distance to a target on the basis of a first received light pulse signal from a first light receiving unit, a reference cycle, and a second received light pulse signal from a second light receiving unit, and a determination circuit for determining whether a crosstalk value can be calculated on the basis of the time difference extracted by the time difference extraction circuit and the reference cycle.
    Type: Grant
    Filed: September 29, 2018
    Date of Patent: July 7, 2020
    Assignee: SHARP KABUSHIKI KAISHA
    Inventors: Hideki Sato, Yoshiki Ikuta, Takayuki Shimizu, Takuma Hiramatsu
  • Patent number: 10698112
    Abstract: Systems and methods for monitoring underwater structures are provided. First and second sets of point cloud data that are obtained at different times are compared to determine whether the location of the underwater structure has changed. For detecting vibration, a series of range measurements taken along a line intersecting the underwater structure are compared to one another to determine an amplitude and frequency of any vibration present in the underwater structure. For detecting temperature, the ratio of different components of return signals obtained from a point in the water surrounding the underwater structure is measured to derive the temperature of the water. Leak detection can be performed by scanning areas around the underwater structure. Monitoring systems can include a primary receiver for range measurements, and first and second temperature channel receivers for temperature measurements.
    Type: Grant
    Filed: March 27, 2019
    Date of Patent: June 30, 2020
    Assignee: 3D at Depth, Inc.
    Inventors: Carl W. Embry, Mark Hardy, Brett Nickerson, Neil Manning
  • Patent number: 10698108
    Abstract: An optical distance measuring system includes a transmitter and a receiver. The transmitter is configured to generate a first optical waveform and direct the first optical waveform toward a first scan point within a field of view (FOV). The receiver is configured to receive the first optical waveform reflected off a first object within the FOV, direct the first optical waveform reflected off the first object to a first photodiode group of an array of photodiode elements, and determine a distance to the first object based on a time of flight of the first optical waveform from the transmitter to the first object and back to the receiver.
    Type: Grant
    Filed: August 21, 2017
    Date of Patent: June 30, 2020
    Assignee: TEXAS INSTRUMENTS INCORPORATED
    Inventors: David P. Magee, Nirmal C. Warke, Baher S. Haroun
  • Patent number: 10691926
    Abstract: The present disclosure relates to performing facial recognition using a single-pixel sensor that measures the time signature of a light pulse reflected from a subjects face. Due to depth differences between the sensor position and different parts of the subject's face reflections of a short duration illumination pulse from the different parts of the subject's face will arrive back at the sensor at different times, thus providing a time-based one-dimensional signature unique to the individual subject. By analyzing the reflection signature using neural networks or principal component analysis (PCA), recognition of the subject can be obtained. In addition, the same system may also be used to recognize or discriminate between any other objects of known shape in addition to faces, for example manufactured products on a production line, or the like.
    Type: Grant
    Filed: May 3, 2018
    Date of Patent: June 23, 2020
    Assignee: ANALOG DEVICES, INC.
    Inventors: Maurizio Zecchini, Paul O'Sullivan, Chao Wang
  • Patent number: 10670721
    Abstract: A lidar including a laser having a first frequency-modulated laser radiation and a second frequency-modulated laser radiation, a first waveguide coupled to the laser, wherein the first frequency-modulated laser radiation and the second frequency-modulated laser radiation are transmitted by the laser into the first waveguide, a second waveguide, a filter coupled between the first waveguide and the second waveguide, wherein the filter is configured to couple and pass the first frequency-modulated laser radiation through the filter to the second waveguide, and is configured to not couple or pass the second frequency-modulated laser radiation through the filter to the second waveguide, and a photodetector coupled to the second waveguide.
    Type: Grant
    Filed: May 31, 2017
    Date of Patent: June 2, 2020
    Assignee: HRL Laboratories, LLC
    Inventor: Oleg M. Efimov
  • Patent number: 10670722
    Abstract: A method is disclosed to determine a traveling time for a plurality of received light pulses that reflected and returned from an object. Each returned light pulse is associated with a timestamp indicating a time between a transmission time of a corresponding light pulse and a time of arrival of the returned light pulse. For each timestamp, a number C is determined of time stamps that are subsequent to the timestamp and within a predetermined time window after the timestamp. A maximum number C is determined, and an index i is determined for the maximum number C. A traveling time is determined for the plurality of light pulses as an average of the timestamp having a same index as the maximum number C and timestamps that are within the predetermined time window after the timestamp having the same index as the maximum number C.
    Type: Grant
    Filed: November 8, 2017
    Date of Patent: June 2, 2020
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Lilong Shi, Yibing Michelle Wang
  • Patent number: 10671066
    Abstract: Systems and methods for scanning environments and tracking unmanned aerial vehicles within the scanned environments are disclosed. A method in accordance with a particular embodiment includes using a rangefinder off-board an unmanned air vehicle (UAV) to identify points in a region. The method can further include forming a computer-based map of the region with the points and using the rangefinder and a camera to locate the UAV as it moves in the region. The location of the UAV can be compared with locations on the computer-based map and, based upon the comparison, the method can include transmitting guidance information to the UAV. In a further particular embodiment, two-dimensional imaging data is used in addition to the rangefinder data to provide color information to points in the region.
    Type: Grant
    Filed: March 2, 2016
    Date of Patent: June 2, 2020
    Assignee: PreNav, Inc.
    Inventors: Asa Hammond, Nathan Schuett, Naimisaranya Das Busek
  • Patent number: 10672197
    Abstract: A technique includes determining a depth value for each of a plurality of pixels of a frame, down-sampling the depth values of a tile of the frame to obtain a plurality of down-sampled depth values, the frame including one or more tiles, determining a change in a head pose, determining, from the plurality of down-sampled depth values, a down-sampled depth value for a vertex, determining an adjusted position for the vertex based on the change in head pose and the down-sampled depth value for the vertex, performing, based on at least the adjusted position for the vertex, a depth-adjusted time-warping of the frame to obtain a depth-adjusted time-warped frame, and triggering display of the depth-adjusted time-warped frame.
    Type: Grant
    Filed: October 21, 2019
    Date of Patent: June 2, 2020
    Assignee: GOOGLE LLC
    Inventor: John Paul Bates
  • Patent number: 10653937
    Abstract: Techniques are provided for implementing a system for determining the range to a target object and orienting a map. In implementations, GPS data is used to determine the location of the system and an approximate distance from that location to the target. Based on the approximate distance, one or more parameters of operation of the system may be set. Modes of operation may be entered to further adjust parameters of operation. An optical pulse may then be projected at the target and its reflections collected and analyzed to calculate a distance measurement. A visual display may be adjusted based on the calculated distance estimate to the target.
    Type: Grant
    Filed: February 28, 2017
    Date of Patent: May 19, 2020
    Assignee: Garmin Switzerland GmbH
    Inventors: Robert A. Lewis, Dennis O. Corey
  • Patent number: 10649410
    Abstract: This invention relates to apparatus and methods for measuring the time-of-flight of a signal. The signal may be acoustic energy or electromagnetic energy such as x-ray, radio frequency, microwave, millimeter-wave, radar, and laser. Unlike unambiguous ranging devices that measures the phases of two or more signals to determine the time-of-flight and requires long averaging to achieve some degree of accuracy, this invention phase lock one or more transmitter signals to the corresponding received signals in predetermined phase relationships and measures the frequencies of one or more variable frequency oscillators having frequencies several times higher than the frequency of the transmitter signal to determined the time-of-flight with much higher accuracy.
    Type: Grant
    Filed: October 6, 2017
    Date of Patent: May 12, 2020
    Inventor: Thomas Broussard
  • Patent number: 10627491
    Abstract: Methods and systems for performing three dimensional LIDAR measurements with an integrated LIDAR measurement device are described herein. In one aspect, a Gallium Nitride (GaN) based illumination driver integrated circuit (IC), an illumination source, and a return signal receiver IC are mounted to a common substrate. The illumination driver IC provides a pulse of electrical power to the illumination source in response to a pulse trigger signal received from the return signal receiver IC. In another aspect, the GaN based illumination driver IC controls the amplitude, ramp rate, and duration of the pulse of electrical power based on command signals communicated from the return signal receiver IC to the illumination driver IC. In a further aspect, illumination driver IC reduces the amount of electrical power consumed by the illumination driver IC during periods of time when the illumination driver IC is not providing electrical power to the illumination source.
    Type: Grant
    Filed: July 12, 2019
    Date of Patent: April 21, 2020
    Assignee: Velodyne Lidar, Inc.
    Inventors: David S. Hall, Raymond Liou, Oren Milgrome, Marius Paul Dumitrean
  • Patent number: 10627492
    Abstract: A computing system may operate a LIDAR device to emit and detect light pulses in accordance with a time sequence including standard detection period(s) that establish a nominal detection range for the LIDAR device and extended detection period(s) having durations longer than those of the standard detection period(s). The system may then make a determination that the LIDAR detected return light pulse(s) during extended detection period(s) that correspond to particular emitted light pulse(s). Responsively, the computing system may determine that the detected return light pulse(s) have detection times relative to corresponding emission times of particular emitted light pulse(s) that are indicative of one or more ranges. Given this, the computing system may make a further determination of whether or not the one or more ranges indicate that an object is positioned outside of the nominal detection range, and may then engage in object detection in accordance with the further determination.
    Type: Grant
    Filed: August 1, 2017
    Date of Patent: April 21, 2020
    Assignee: Waymo LLC
    Inventor: Mark Alexander Shand
  • 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: 10622390
    Abstract: An optical apparatus including a semiconductor substrate; a first light absorption region supported by the semiconductor substrate, the first light absorption region including germanium and configured to absorb photons and to generate photo-carriers from the absorbed photons; a first layer supported by at least a portion of the semiconductor substrate and the first light absorption region, the first layer being different from the first light absorption region; one or more first switches controlled by a first control signal, the one or more first switches configured to collect at least a portion of the photo-carriers based on the first control signal; and one or more second switches controlled by a second control signal, the one or more second switches configured to collect at least a portion of the photo-carriers based on the second control signal, wherein the second control signal is different from the first control signal.
    Type: Grant
    Filed: February 28, 2018
    Date of Patent: April 14, 2020
    Assignee: Artilux, Inc.
    Inventors: Yun-Chung Na, Che-Fu Liang, Szu-Lin Cheng, Shu-Lu Chen, Kuan-Chen Chu, Chung-Chih Lin, Han-Din Liu
  • Patent number: 10620301
    Abstract: Disclosed are improved LiDAR systems methods employing late-lock Geiger mode detection. In sharp contrast to the prior art, a late-lock Geiger mode detection system and/or method utilizes a pulsed laser and asynchronous avalanche photodiodes with a holdoff time between photodiode arm pulses that are substantially equal to—but slightly less than—the laser pulse period. Preferably, such difference between the holdoff time and the pulse period is <10 nsec.
    Type: Grant
    Filed: April 4, 2017
    Date of Patent: April 14, 2020
    Assignee: ARGO AI, LLC
    Inventor: Samuel Richard Wilton
  • Patent number: 10617341
    Abstract: The present invention relates to a processor for processing skin conductance data of a living being, comprising an input unit (12) for receiving a skin conductance data signal (13) comprising a plurality of data peaks, a calculating unit (14) for computing a skin conductance peak data signal over a long-term period by deriving a feature related to said data peaks from said skin conductance data signal (13) and forming a summation of said feature per time unit and an analyzing unit (16) for analyzing an average and/or an absolute value of said skin conductance peak data signal over at least a portion of said period to get information on at least one stage of burnout and/or chronic fatigue syndrome of said living being.
    Type: Grant
    Filed: November 21, 2014
    Date of Patent: April 14, 2020
    Assignee: Koninklijke Philips N.V.
    Inventors: Martin Ouwerkerk, Joanne Henriette Desiree Monique Westerink, Alphons Antonius Maria Lambertus Bruekers
  • Patent number: 10616519
    Abstract: Pixel arrangements in time-of-flight sensors or other imaging sensors are presented that include a sensing element configured to accumulate charges related to incident light, and two transfer gates proximate to the sensing element and configured to selectively control transfer of the charges in the pixel arrangement. During an integration phase, a charge storage element for a global shutter stores first charges received from the sensing element based on activation of a first transfer gate and inactivation of a second transfer gate. During a reset phase, a diffusion node receives second charges received from the sensing element based on inactivation of the first transfer gate and activation of the second transfer gate. During a pixel readout phase, the diffusion node receives the first charges received from the charge storage element based on activation of the first transfer gate and activation of the second transfer gate.
    Type: Grant
    Filed: December 20, 2016
    Date of Patent: April 7, 2020
    Assignee: Microsoft Technology Licensing, LLC
    Inventors: Tamer Elkhatib, Cyrus Soli Bamji
  • Patent number: 10613225
    Abstract: According to an embodiment, a distance measuring device measures a distance to the measured object base on light scattered on the measured object is detected. The distance measuring device includes an optical detector and a measurer. The optical detector detects the scattered light. The measurer has a sampler to sample a signal corresponding to an output signal of the optical detector every time when the light is emitted at a plurality of sampling time points and a storage to accumulate sampling values and store an accumulation value at each sampling time point. The measurer measures the distance based on a plurality of accumulation values at the sampling time points.
    Type: Grant
    Filed: September 13, 2016
    Date of Patent: April 7, 2020
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Hiroshi Kubota, Tomonori Fukushima, Nobu Matsumoto
  • Patent number: 10613413
    Abstract: A depth camera assembly for determining depth information for objects in a local area comprises a light generator, a camera and a controller. The light generator illuminates the local area with structured light in accordance with emission instructions from the controller. The light generator includes an illumination source, an acousto-optic deflector (AOD), and a liquid crystal device (LCD) with liquid crystal gratings (LCGs). The AOD functions as a dynamic diffraction grating that diffracts optical beams emitted from the illumination source to form diffracted scanning beams, based on emission instructions from the controller. Each LCG in the LCD is configured to further diffract light from the AOD to generate the structured light projected into the local area. The camera captures images of portions of the structured light reflected from objects in the local area. The controller determines depth information for the objects based on the captured images.
    Type: Grant
    Filed: April 23, 2018
    Date of Patent: April 7, 2020
    Assignee: Facebook Technologies, LLC
    Inventors: Lu Lu, Qing Chao
  • Patent number: 10605918
    Abstract: A system for three-dimensional hyperspectral imaging includes an illumination source configured to illuminate a target object; a dispersive element configured to spectrally separate light received from the target object into different colors; and a light detection and ranging focal plane array (FPA) configured to receive the light from the dispersive element, configured to acquire spatial information regarding the target object in one dimension in the plane of the FPA, configured to acquire spectral information in a second dimension in the plane of the FPA, wherein the second dimension is perpendicular to the first dimension, and configured to obtain information regarding the distance from the FPA to the target object by obtaining times of flight of at least two wavelengths, thereby imaging the target object in three dimensions and acquiring spectral information on at least one 3D point.
    Type: Grant
    Filed: July 13, 2016
    Date of Patent: March 31, 2020
    Assignee: NORTHROP GRUMMAN SYSTEMS CORPORATION
    Inventor: Chung Ming Wong
  • Patent number: 10605899
    Abstract: A distributed FM LiDAR system that provides a central unit that includes a frequency modulated optical signal source and a central receiver for reflected light, along with multiple optical heads that include only optical components is described. No optical delay lines or timing compensation photonic or electronic circuitry is necessary between the central unit and the optical heads. The relatively simple optical heads do not require extensive protection from shock or vibration, and can be distributed between a vehicle and a towed trailer or similar vehicle, with connections being provided by an optical coupling.
    Type: Grant
    Filed: December 30, 2018
    Date of Patent: March 31, 2020
    Assignee: GM Global Technology Operations LLC
    Inventors: Scott Singer, Lutfollah Maleki
  • Patent number: 10591604
    Abstract: A focal plane array light detection and ranging 3D imaging method based on a code division multiple access technique is provided. A narrow laser pulse is shaped into a flat-top beam. The shaped beam is space-time encoded by a focal plane array-based optical encoder. The encoded beam is projected onto the target. The echo signals are obtained by a collecting lens. According to the encoding rule, the signals are grouped and multiplexed into several channels; subsequently, the multi-channel multiplexed signals are captured by a focal plane array detector and converted by a multi-channel digitizer. The multi-channel encoded full waveform signals are acquired from the digitizer by a PC terminal. The encoded full waveforms can be demodulated into the flight ranges for all subpixels via signal processing. By orthogonal range correction and pixel splicing and integrating the geographical data of all pixels, the 3D image reconstruction of the target can be accomplished.
    Type: Grant
    Filed: October 26, 2017
    Date of Patent: March 17, 2020
    Assignee: NANJING UNIVERSITY OF AERONAUTICS AND ASTRONAUTICS
    Inventor: Fan Xu
  • Patent number: 10591599
    Abstract: A LIDAR can encounter a remotely located mirror as it moves through a local environment (e.g. a convex roadside mirror). The remote mirror can occupy a small portion of the LIDAR field of view but offer a wealth of reflection data regarding a larger indirect field of view (e.g. around a corner). In one embodiment a LIDAR can learn the location of the remote mirror and then can dynamically increase the density of laser ranging measurements in an associated mirror region of the field of view. The LIDAR can track the mirror region as it moves in the local environment with an increased density of outgoing laser pulses and thereby interrogate the remote mirror for reflection data from a wide indirect field of view.
    Type: Grant
    Filed: November 16, 2017
    Date of Patent: March 17, 2020
    Inventor: James Thomas O'Keeffe
  • Patent number: 10585175
    Abstract: LiDAR (light detection and ranging) systems use one or more emitters and a detector array to cover a given field of view where the emitters each emit a single pulse or a multi-pulse packet of light that is sampled by the detector array. On each emitter cycle the detector array will sample the incoming signal intensity at the pre-determined sampling frequency that generates two or more samples per emitted light packet to allow for volumetric analysis of the retroreflected signal portion of each emitted light packet as reflected by one or more objects in the field of view and then received by each detector.
    Type: Grant
    Filed: June 6, 2016
    Date of Patent: March 10, 2020
    Assignee: Big Sky Financial Corporation
    Inventors: James E. Retterath, Robert A. Laumeyer
  • Patent number: 10585176
    Abstract: A time of flight sensor device is provided that is capable of generating accurate information relating to propagation time of emitted light pulses using a small number of measurements or data captures. By generating pulse time of flight information using a relatively small number of measurement cycles, object distance information can be generated more quickly, resulting in faster sensor response times. Embodiments of the time of flight sensor can also minimize or eliminate the adverse effects of ambient light on time of flight measurement. Moreover, some embodiments execute time of flight measurement techniques that can achieve high measurement precision even when using relatively long light pulses having irregular, non-rectangular shapes.
    Type: Grant
    Filed: September 19, 2017
    Date of Patent: March 10, 2020
    Assignee: Rockwell Automation Technologies, Inc.
    Inventors: Frederic Boutaud, Mei Li
  • Patent number: 10578781
    Abstract: A system including a light projecting system configured to project collimated beams of light; and a switchable diffuser. The switchable diffuser is coupled to a control source. The switchable diffuser changes from a first state to a second state responsive to the source being changed from a first condition to a second condition (e.g., changing a voltage condition from 0V to 1-50V). In the first state, the switchable diffuser receives collimated beams of light, diffuses them and projects a flood light. In the second state, the switchable diffuser is substantially transparent to the plurality of collimated beams of light, and permits the collimated beams of light to propagate through and out as an array. Systems may also include a detector configured to capture flood light and dot array reflections, and/or a ToF detector configured to measure time differences between different portions of returning light reflected off of a surface.
    Type: Grant
    Filed: January 28, 2019
    Date of Patent: March 3, 2020
    Assignee: Shenzhen Guangjian Technology Co., Ltd.
    Inventors: Li Zhu, Fanglu Lyu, Bo Wang
  • Patent number: 10574967
    Abstract: A method for performing an operation on an object includes capturing a plurality of images of the object. Each image is a different view of the object. The method also includes generating a sparse 3D point cloud from the plurality of images. The sparse 3D point cloud defines a 3D model of the object. The sparse 3D point cloud includes a multiplicity of missing points that each correspond to a hole in the 3D model that renders the 3D model unusable for performing the operation on the object. The method additionally includes performing curvature-based upsampling to generate a denser 3D point cloud. The denser 3D point cloud includes a plurality of filled missing points. The missing points are filled from performance of the curvature-based upsampling. The denser 3D point cloud defines a dense 3D model that is useable for performing the operation on the object.
    Type: Grant
    Filed: March 23, 2017
    Date of Patent: February 25, 2020
    Assignee: The Boeing Company
    Inventors: Hyukseong Kwon, Kyungnam Kim, Heiko Hoffmann
  • Patent number: 10571568
    Abstract: A distance measuring device executes a collection process that includes driving a MEMS mirror in each of a plurality of sensors and collecting a drive voltage of the MEMS mirror satisfying a given condition, executes a drive frequency determination process that includes determining a drive frequency of the MEMS mirror when measuring distances by the plurality of sensors based on the drive voltage of the MEMS mirror, and executes a control signal generation process that includes generating and transmitting a control signal to the plurality of sensors, the control signal including configuration information specifying the drive frequency as a drive frequency of the MEMS mirror in each of the plurality of sensors, the configuration information including the drive frequency determined by the drive frequency determination process.
    Type: Grant
    Filed: September 26, 2017
    Date of Patent: February 25, 2020
    Assignee: FUJITSU LIMITED
    Inventors: Koichi Iida, Takeshi Morikawa, Jun Kawai, Koichi Tezuka, Kosuke Yanai
  • Patent number: 10564521
    Abstract: A system including: a light source, a switchable diffuser, a structured light detector, and a ToF detector. The light source and switchable diffuser are controlled to operate in concert (together, and/or with other optical and electrical elements of the system) to project pulses of collimated beams of light (interleaved between pulses of flood light) during a single image capture period, the pulses of collimated beams of light being resolvable by the structured light detector and the ToF detector within the same image capture period.
    Type: Grant
    Filed: February 5, 2019
    Date of Patent: February 18, 2020
    Assignee: Shenzhen Guangjian Technology Co., Ltd.
    Inventors: Li Zhu, Fanglu Lyu, Bo Wang
  • 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: 10557929
    Abstract: A lidar apparatus includes a foreign matter detector detecting foreign matter hindering laser light and reflected light from passing through the light transmission window, based on at least one of the measurement success or failure result and the signal-to-noise ratio; a precipitation determiner determining whether precipitation, included in the foreign matter, exists on the external surface of the light transmission window based on a time elapsed since the latest wiper operation, when the foreign matter detector detects the foreign matter, and that the precipitation does not exist, when the foreign matter detector does not detect the foreign matter. When the precipitation determiner determines that precipitation exists, the wiper operation controller causes the wiper to operate and the washer fluid supplier not to operate.
    Type: Grant
    Filed: June 27, 2016
    Date of Patent: February 11, 2020
    Assignee: Mitsubishi Electric Corporation
    Inventors: Yutaka Kajiyama, Yoshiyuki Yabugaki, Masayuki Enjo
  • Patent number: 10557965
    Abstract: An embodiment device includes an optical source configured to transmit an optical pulse and an optical sensor configured to receive a reflection of the optical pulse. The device further includes a processor configured to determine a parameter based on the reflection, the parameter indicative of a distance between the device and a target; and a controller configured to generate a first control signal based on the parameter, the first control signal being configured to control an operation of the optical source.
    Type: Grant
    Filed: December 2, 2016
    Date of Patent: February 11, 2020
    Assignee: STMICROELECTRONICS (GRENOBLE 2) SAS
    Inventor: Olivier Lemarchand