Patents Examined by Mark Hellner
  • Patent number: 11367990
    Abstract: In one embodiment, a lidar system includes a light source configured to emit light at one or more wavelengths between 1200 nm and 1400 nm. The lidar system also includes a scanner configured to scan the emitted light across a field of regard of the lidar system and a receiver configured to detect a portion of the emitted light scattered by a target located a distance from the lidar system. 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 for the portion of the emitted light to travel from the lidar system to the target and back to the lidar system.
    Type: Grant
    Filed: August 29, 2019
    Date of Patent: June 21, 2022
    Assignee: Luminar, LLC
    Inventors: Jason M. Eichenholz, Laurance S. Lingvay, David Welford
  • Patent number: 11366202
    Abstract: A light detection and ranging (LIDAR) device includes a laser assembly tier and a photonic integrated circuit (PIC) tier. The laser assembly tier includes a laser configured to emit laser light. The PIC tier includes a semiconductor optical amplifier (SOA) and a PIC wafer configured to incouple laser light into the PIC wafer and direct the laser light to the SOA.
    Type: Grant
    Filed: June 29, 2021
    Date of Patent: June 21, 2022
    Assignee: OURS Technology, LLC
    Inventors: Lei Wang, Sen Lin, Andrew Steil Michaels
  • Patent number: 11360214
    Abstract: A light detection and ranging (LIDAR) system to transmit optical beams including at least up-chirp frequency and at least one down-chirp frequency toward targets in a field of view of the LIDAR system and receive returned signals of the up-chirp and the down-chirp as reflected from the targets. The LIDAR system generates a baseband signal in a frequency domain of the returned signals of the at least one up-chirp frequency and the at least one down-chirp frequency. The baseband signal includes a first set of peaks associated with the at least the at least one up-chirp frequency and a second set of peaks associated with the at least one down-chirp frequency. The LIDAR system determines the target location using the first set of peaks and the second set of peaks.
    Type: Grant
    Filed: October 6, 2021
    Date of Patent: June 14, 2022
    Assignee: Aeva, Inc.
    Inventors: Esha John, Jose Krause Perin, Kumar Bhargav Viswanatha, Rajendra Tushar Moorti, Mina Rezk
  • Patent number: 11353586
    Abstract: A light wave distance meter according to the present invention includes: a light-emitting element that emits a distance measurement light; a light-receiving element that outputs a light-receiving signal; a frequency conversion unit that includes a bandpass filter; an arithmetic control unit that computes a distance value to a measurement object; a signal generator that generates a signal having a predetermined frequency; a waveform conversion unit that generates a waveform conversion signal; pulse generators that generate pulse signals by pulsating the signal having a predetermined frequency so as to have a waveform profile of a signal constituted of desired frequency components on the basis of the signal output from the signal generator and the waveform conversion signal output from the waveform conversion unit; and a drive unit that emits the distance measurement light based on the pulse signals.
    Type: Grant
    Filed: March 25, 2020
    Date of Patent: June 7, 2022
    Assignee: Topcon Corporation
    Inventor: Naoki Shoji
  • Patent number: 11346932
    Abstract: A system for a target image reconstruction includes a stepped frequency transmitter configured to emit a stepped frequency waveform having different constant frequencies at different periods of time and a modulator configured to modulate the stepped frequency waveform emitted at each period of time with a modulation signal to output a modulated stepped frequency waveform with an increased bandwidth. The system includes a transceiver configured to transmit the modulated stepped frequency waveform to a target and to accept reflection of the modulated stepped frequency waveform reflected from the target, a mixer to interfere the unmodulated stepped frequency waveform and the reflection of the modulated stepped frequency waveform to produce a beat signal of the interference of the unmodulated stepped frequency waveform with the reflection of the modulated stepped frequency waveform, and a signal processor to reconstruct an image of the target from the beat signal.
    Type: Grant
    Filed: December 20, 2018
    Date of Patent: May 31, 2022
    Assignee: Mitsubishi Electric Research Laboratories, Inc.
    Inventors: David Millar, Pu Wang, Kieran Parsons, Philip Orlik
  • Patent number: 11349271
    Abstract: A bulk compressor for use in a chirped pulse amplification system (CPA) comprising a tunable pulse stretcher and an amplifier is provided. The bulk compressor includes a mounting block formed as a monolithic structure and made of solid material. The mounting block may define a plurality of mounting surfaces each forming a collar surrounding a light passage. Optical components are mounted on the mounting block in a fixed mutual spatial relationship, each optical component having a front face having a peripheral portion mounted in direct contact with the collar formed by a respective one of the mounting surfaces. The bulk compressor may be provided as a stand-alone component, a part of a stretcher-compressor pair or a full CPA system, and may be used in a method for amplifying input optical pulses.
    Type: Grant
    Filed: December 4, 2018
    Date of Patent: May 31, 2022
    Assignee: TERAXION INC.
    Inventors: François Trépanier, Pascal Deladurantaye, Axel Saumier-Verret, Sylvain Boudreau, René Dionne, Mathieu Demers, Jean-Thomas Landry
  • Patent number: 11340337
    Abstract: A laser transmitter assembly for use in a Coherent Doppler Wind Lidar (“CDWL”) system includes a telescope/scanner assembly, a receiver, and a master oscillator crystal and a power amplifier crystal each constructed of Ho:YAG. The crystals are end-pumped to transmit an output beam through the telescope/scanner assembly with a high repetition rate of 200-300 Hz and 35 mJ of energy. As part of the CDWL system, a pump laser end-pumps the master oscillator and power amplifier crystals using a pump beam having a nominal wavelength of 1.905 ?m. A seed laser transmits a seeding beam into the master oscillator crystal at a nominal wavelength of 2.0965 ?m. The telescope/scanner assembly transmits the generated laser beam through an atmosphere toward a scene of interest, collects a backscattered return signal, and communicates the backscattered return signal to the receiver during operation of the CDWL system.
    Type: Grant
    Filed: December 17, 2019
    Date of Patent: May 24, 2022
    Assignee: UNITED STATES OF AMERICA AS REPRESENTED BY THE ADMINISTRATOR OF NASA.
    Inventors: Upendra N Singh, Mulugeta Petros, Tamer F. Refaat
  • Patent number: 11333740
    Abstract: Aspects of the present disclosure involve systems, methods, and devices for determining specular reflectivity characteristics of objects using a Lidar system of an autonomous vehicle (AV) system. A method includes transmitting at least two light signals directed at a target object utilizing the Lidar system of the AV system. The method further includes determining at least two reflectivity values for the target object based on return signals corresponding to the at least two light signals. The method further includes classifying specular reflectivity characteristics of the target object based on a comparison of the first and second reflectivity value. The method further includes updating a motion plan for the AV system based on the specular reflectivity characteristics of the target object.
    Type: Grant
    Filed: August 28, 2018
    Date of Patent: May 17, 2022
    Assignee: UATC, LLC
    Inventor: Scott Dylewski
  • Patent number: 11327176
    Abstract: A laser radar device includes: a primary light source configured to combine laser beams having different wavelengths to generate primary light; an optical splitter configured to split the primary light into transmission light and reference light; an optical modulator configured to modulate the transmission light to generate modulated transmission light; an optical transmitter/receiver system configured to emit the modulated transmission light into an external space and receive light scattered or diffused by a target; an optical combiner configured to combine the reference light and the received light to generate an optical beat signal; and a photodetector circuit configured to perform an optical-to-electrical signal conversion of the optical beat signal to generate a received signal; and a signal processing circuit configured to calculate a measurement value related to the target on the basis of the received signal.
    Type: Grant
    Filed: December 27, 2017
    Date of Patent: May 10, 2022
    Assignee: Mitsubishi Electric Corporation
    Inventors: Masaharu Imaki, Takayuki Yanagisawa
  • Patent number: 11327158
    Abstract: A received signal is sampled at the LiDAR system and the received signal is converted to a frequency domain, where the received signal comprises a first frequency waveform. A matched filter is selected, where the matched filter comprises a second frequency waveform with a set of coefficients to match the first frequency waveform. The set of coefficients are updated according to a set of metrics. The received signal is filtered by the matched filter to generate a filtered received signal. Range and velocity information is extracted from the filtered received signal.
    Type: Grant
    Filed: June 22, 2021
    Date of Patent: May 10, 2022
    Assignee: Aeva, Inc.
    Inventors: Jose Krause Perin, Mina Rezk, Kumar Bhargav Viswanatha, Rajendra Tushar Moorti
  • Patent number: 11329448
    Abstract: A fluid-cooled laser amplifier module (100) is disclosed which comprises: a casing; a plurality of slabs (110) of optical gain medium oriented in parallel in the casing for cooling by a fluid stream (154, 156); a polarisation rotator (120) disposed between a first group of one or more slabs (111) of the optical gain medium and a second group of one or more slabs (112) of the optical gain medium; optical windows (150, 152) for receiving an input beam or pulse (130) for amplifying by the slabs and for outputting the amplified beam or pulse (140); and fluid stream ports (155, 157) for receiving and discharging the fluid stream for cooling the slabs.
    Type: Grant
    Filed: May 23, 2018
    Date of Patent: May 10, 2022
    Assignee: UNITED KINGDOM RESEARCH AND INNOVATION
    Inventors: Paul Mason, Mariastefania De Vido
  • Patent number: 11320538
    Abstract: A solid state LIDAR transmitter with matrix-addressable laser drive circuit includes a first electrical bus that provides a first voltage potential to columns of the matrix-addressable laser drive circuit and a second electrical bus that provide a second voltage potential to rows of the matrix-addressable laser drive circuit. A plurality of column switches connects the plurality of columns to the first electrical bus. A plurality of row switches connects the plurality of rows to the second electrical bus. The transmitter includes a plurality of series connected diodes comprising a laser diode in series with another diode, where a respective one of the plurality of series connected diodes is electrically connected between a respective column and row of the matrix-addressable laser drive circuit to form the LIDAR transmitter. At least some of the second diodes increasing an overall reverse breakdown voltage of the series connected diodes.
    Type: Grant
    Filed: April 10, 2021
    Date of Patent: May 3, 2022
    Assignee: Opsys Tech Ltd.
    Inventors: Mark J. Donovan, Raphael Harel, Noam Tziony, Mordehai Caspi, Meir Fogel
  • Patent number: 11320522
    Abstract: A light detection and ranging (LIDAR) system uses optical sources to emit a continuous-wave (CW) optical beam and a frequency-modulated (FMCW) optical beam. A first set off optical components is coupled with the optical sources to generate a CW local oscillator (LO) signal from the CW optical beam, to generate an FMCW LO signal from the FMCW optical beam, and to combine the CW optical beam and the FMCW optical beam into a combined optical beam. A second set of optical components is coupled with the first set of optical components, to transmit the combined optical beam toward a target environment and to receive a target return signal from the target environment. A third set of optical components is coupled with the second set of optical components, to generate and detect a target velocity component of the target return signal and a target range component of the target return signal.
    Type: Grant
    Filed: September 17, 2019
    Date of Patent: May 3, 2022
    Assignee: Aeva, Inc.
    Inventors: Oguzhan Avci, Omer P. Kocaoglu, Neal N. Oza, Keith Gagne, Behsan Behzadi, Mina Rezk
  • Patent number: 11313971
    Abstract: A three-dimensional imaging system and method are provided. The three-dimensional imaging system includes: an ultrashort pulse laser light source configured to generate a detection beam; a supercontinuum spectrum generator configured to generate a supercontinuum spectrum based on the detection beam passing through the supercontinuum spectrum generator; a pulse separation delayer configured to generate a continuous pulse sequence of different wavelengths with a time interval based on the supercontinuum spectrum; a multi-frequency pulse interference fringe generator configured to generate multi-frequency interference fringe patterns of different wavelength ranges with a time interval based on the continuous pulse sequence; and an image acquisition device configured to acquire an optical signal reflected by a sample irradiated by the multi-frequency interference fringe patterns to obtain a three-dimensional topography of the sample.
    Type: Grant
    Filed: July 28, 2021
    Date of Patent: April 26, 2022
    Assignee: BEIJING INSTITUTE OF TECHNOLOGY
    Inventors: Lan Jiang, Baoshan Guo, Tianyong Zhang
  • Patent number: 11307307
    Abstract: A reflector matching algorithm based on triangle perimeter matching includes recording the position information of known reflectors in a map one by one, generating a scene coordinate point layout, taking points of the recorded reflectors and freely combining basic triangles with all side lengths not exceeding twice of the maximum detection distance of a laser sensor; recording all the combined basic triangles, then recording the corresponding side lengths, the position of each vertex, and the perimeter of each basic triangle, and saving the records in an AGV; reading the angle and distance information of the reflectors and freely combining detection triangles for the detected reflectors; and respectively calculating the side lengths and perimeters of the detection triangles, and searching and pairing in the basic triangle combination to determine the real-time position of the laser sensor.
    Type: Grant
    Filed: November 1, 2018
    Date of Patent: April 19, 2022
    Assignee: Guangdong Jaten Robot & Automation Co., Ltd.
    Inventor: Jiehui Zhong
  • Patent number: 11307295
    Abstract: A set of POIs of a point cloud are received at a first filter, where each POI of the set of POIs comprises one or more points. Each POI of the set of POIs is filtered. At a second filter, a first set of neighborhood points of a POI is selected. A first metric for the first set of neighborhood points is computed. Based on the first metric, a first score of the POI is determined. At a third filter, a second set of neighborhood points of a POI is selected. A second metric for the second set of neighborhood points is computed. Based on the second metric, a second score of the POI is determined. At the first filter, based on the first score and the second score, whether to accept the POI, modify the POI, or reject the POI, is determined to extract range or velocity information.
    Type: Grant
    Filed: August 10, 2021
    Date of Patent: April 19, 2022
    Assignee: Aeva, Inc.
    Inventors: Krishna Toshniwal, Bruno Hexsel, Kumar Bhargav Viswanatha, Jose Krause Perin
  • Patent number: 11303096
    Abstract: A laser diode firing circuit for a light detection and ranging device is disclosed. The firing circuit includes a laser diode coupled in series to a transistor, such that current through the laser diode is controlled by the transistor. The laser diode is configured to emit a pulse of light in response to current flowing through the laser diode. The firing circuit includes a capacitor that is configured to charge via a charging path that includes an inductor and to discharge via a discharge path that includes the laser diode. The transistor controlling current through the laser diode can be a Gallium nitride field effect transistor.
    Type: Grant
    Filed: March 18, 2019
    Date of Patent: April 12, 2022
    Assignee: Waymo LLC
    Inventors: Samuel William Lenius, Pierre-yves Droz
  • Patent number: 11296478
    Abstract: Techniques are provided for scaling the average power of high-energy solid-state lasers to high values of average output power while maintaining high efficiency. An exemplary technique combines a gas-cooled-slab amplifier architecture with a pattern of amplifier pumping and extraction in which pumping is continuous and in which only a small fraction of the energy stored in the amplifier is extracted on any one pulse. Efficient operation is achieved by propagating many pulses through the amplifier during each period equal to the fluorescence decay time of the gain medium, so that the preponderance of the energy cycled through the upper laser level decays through extraction by the amplified pulses rather than through fluorescence decay.
    Type: Grant
    Filed: November 8, 2019
    Date of Patent: April 5, 2022
    Assignee: LAWRENCE LIVERMORE NATIONAL SECURITY, LLC
    Inventors: Alvin C Erlandson, Andrew J Bayramian, Constantin L Haefner, Craig W Siders, Thomas C Galvin, Thomas M Spinka
  • Patent number: 11294034
    Abstract: A proximity sensor (1) with crosstalk compensation comprises a transmitting circuit (10) to transmit a signal to be reflected at a target (2) and a disturbing object (3), and a receiving circuit (20) to receive a reflected signal (RS) having a useful component (RSI) and a noise component (RS2). The receiving circuit (20) comprises an output node (A20) to provide an output signal (Vout2) in dependence from the distance of the proximity sensor (1) from the target (2). The receiving circuit (20) comprises a crosstalk compensation circuit (100) comprising a first charging circuit (110) to provide a first charge for for coarse crosstalk compensation and a second charging circuit (120) to provide a second charge for fine crosstalk compensation. A control circuit (30) sets an amount of the first and the second charge so that the output signal (Vout2) of the crosstalk compensation circuit (100) is dependent on the useful component (RSI) and independent on the noise component (RS2) of the reflected signal (RS).
    Type: Grant
    Filed: June 12, 2018
    Date of Patent: April 5, 2022
    Assignee: AMS AG
    Inventors: Josef Kriebernegg, Chandra Nyshadham, Rahul Thottathil, Hafeez Koonari Thoombath
  • Patent number: 11294040
    Abstract: A TOI Lidar System generates an image of an object based on the distance of various point measurements to the object. The TOI Lidar System detects the envelope of an electrical signal created from an interference light signal. The interference light signal is produced from the back-reflected light resulting from a sampling arm light emission to the object combined with a reference light emission. The reference light emission is created by splitting a pulse-modulated coherent light source's emission signal and passing the reference light emission through a reference arm. The optical interference signal is transferred to a balanced photodetector to convert to an electrical signal converted to digital data. The digital data is evaluated to determine the rising edges or falling edges of a digitized electrical interference signal to determine a time delay between the reference light emission and back-reflected light used to calculate the distance.
    Type: Grant
    Filed: May 10, 2021
    Date of Patent: April 5, 2022
    Assignee: Optowaves, Inc.
    Inventors: Tsung-Han Tsai, Jie Jensen Hou, Hao Wu, Shanxing Su