公开(公告)号：US20240288549A1

公开(公告)日：2024-08-29

申请号：US18113104

申请日：2023-02-23

申请人： Apple Inc.

发明人： Thierry Oggier ,  Ehsan Shah-Hosseini ,  Edward Vail

IPC分类号： G01S7/481 ,  G01S7/4913 ,  G01S17/34

CPC分类号： G01S7/4812 ,  G01S7/4815 ,  G01S7/4913 ,  G01S17/34

摘要： Range sensing apparatus includes a transmitter including an array of emitters configured to emit respective beams of coherent optical radiation and switching circuitry coupled to the emitters. An optical assembly is configured to divide each beam of the coherent optical radiation into a transmitted beam and a local beam, to project the local beam toward an optical detector, to project the transmitted beam toward a respective location on a target, and to direct optical radiation reflected from the respective location onto the optical detector so as to interfere optically with the local beam. A controller is coupled to apply amplitude-chirped electrical drive pulses to the transmitter while controlling the switching circuitry to temporally multiplex the electrical drive pulses among the emitters, and to receive and process electrical beat signals output by the optical detector in response to interference between the reflected optical radiation and the local beam.

公开(公告)号：US12050272B2

公开(公告)日：2024-07-30

申请号：US16921320

申请日：2020-07-06

申请人： UATC, LLC

发明人： Florin Cornel Ignatescu ,  Daniel Fredric Gruver ,  Gaetan Pennecot

IPC分类号： G01S17/931 ,  G01S7/4911 ,  G01S7/4912 ,  G01S7/4913 ,  G01S17/02

CPC分类号： G01S17/931 ,  G01S7/4911 ,  G01S7/4913 ,  G01S17/02 ,  G01S7/4918

摘要： A LIDAR system is provided. The LIDAR system includes an emitter. The emitter includes a light source and one or more lenses positioned along a transmit path. The light source is configured to emit a primary laser beam through the one or more lenses in the transmit path to provide a transmit beam. The LIDAR system includes a receiver spaced apart from the emitter. The receiver includes one or more lenses positioned along a receive path such that the one or more lenses receive a reflected laser beam. The LIDAR system includes an optical element positioned along the transmit path. The optical element is configured to direct a portion of the primary laser beam in a direction towards the receive path as a secondary laser beam.

公开(公告)号：US12032101B1

公开(公告)日：2024-07-09

申请号：US18308430

申请日：2023-04-27

申请人： Waymo LLC

发明人： Ralph H. Shepard ,  Pierre-Yves Droz ,  Caner Onal ,  Hui Son

IPC分类号： G01S17/88 ,  G01S7/4913 ,  G01S7/497 ,  G01S17/00 ,  G01S17/02 ,  G01S17/08 ,  G01S17/06

CPC分类号： G01S7/497 ,  G01S7/4913 ,  G01S17/08

摘要： Example embodiments relate to calibration systems for light detection and ranging (lidar) devices. An example calibration system includes a calibration target that includes a surface having at least one characterized reflectivity. The surface is configured to receive one or more calibration signals emitted by a lidar device along one or more optical axes when the lidar device is separated from the calibration target by an adjustable distance. The calibration system also includes at least one lens that modifies the one or more calibration signals. In addition, the system includes an adjustable attenuator configured to attenuate each of the one or more calibration signals to simulate, in combination with the at least one lens, a distance that is greater than the adjustable distance. Further, the system includes a calibration controller configured to analyze data associated with detected reflections of the one or more calibration signals.

公开(公告)号：US12025749B2

公开(公告)日：2024-07-02

申请号：US16590339

申请日：2019-10-01

申请人： SiLC Technologies, Inc.

发明人： Mehdi Asghari ,  Dazeng Feng ,  Bradley Jonathan Luff

IPC分类号： G01S7/4913 ,  G01S7/40 ,  G01S7/48 ,  G01S7/481 ,  G01S7/486 ,  G01S7/4865 ,  G01S7/4911 ,  G01S7/4912 ,  G01S7/499 ,  G01S17/00 ,  G01S17/08

CPC分类号： G01S7/4913 ,  G01S7/406 ,  G01S7/4802 ,  G01S7/4804 ,  G01S7/4812 ,  G01S7/4818 ,  G01S7/4865 ,  G01S7/4868 ,  G01S7/4911 ,  G01S7/4917 ,  G01S7/499 ,  G01S17/00 ,  G01S17/08

摘要： A LIDAR system includes a light source configured to generate an outgoing light signal that includes multiple channels that are each of a different wavelength. The system includes optical components that generate composite light signals. Each composite light signal includes light from a LIDAR input signal combined with light from a reference signal. The LIDAR input signals each includes light that was reflected by an object located apart from the system and that was included also in one of the channels. The reference signals do not include light that was reflected by the object but include light from one of the channels. Each of the composite signals is generated such that the reference signal and the LIDAR input included in the composite signal includes light from the same channel.

公开(公告)号：US20240159904A1

公开(公告)日：2024-05-16

申请号：US18088812

申请日：2022-12-27

申请人： Su Li ,  Fan Qi ,  Pengfei Cai ,  Yongpeng Zhao

发明人： Su Li ,  Fan Qi ,  Pengfei Cai ,  Yongpeng Zhao

IPC分类号： G01S17/34 ,  G01S7/481 ,  G01S7/4913 ,  G01S7/4915

CPC分类号： G01S17/34 ,  G01S7/4817 ,  G01S7/4913 ,  G01S7/4915

摘要： The present invention discloses a light detection and ranging (LIDAR) system ranging method, including: circularly allocating, by a light routing device, each periodic signal of a transmit signal to each light channel in a chronological order, monitoring a beat signal or a returned light pulse signal in each light channel, and calculating a target distance according to a frequency of the beat signal or a return delay time of the light pulse signal. The present invention further discloses a LIDAR, including: a laser source, a light routing device, an optical scanning system, a light detector, and a data processing module. A quantity of detection points per second of each beam is increased to N times, where N is a quantity of channels of the light routing device, so as to improve the detection efficiency and reduce the requirement on transmit resources; and a scanning mode and an angular resolution can be dynamically controlled according to needs.

公开(公告)号：US11971508B2

公开(公告)日：2024-04-30

申请号：US16924079

申请日：2020-07-08

申请人： Aptiv Technologies AG

发明人： Chenghui Hao ,  Michael DeLaus ,  Geng Fu ,  Denis Rainko

IPC分类号： G01S7/4911 ,  G01S7/4912 ,  G01S7/4913 ,  G01S17/34

CPC分类号： G01S7/4913 ,  G01S7/4911 ,  G01S7/4917 ,  G01S17/34

摘要： This document describes techniques and systems to vary waveforms across frames in lidar systems. The described lidar system transmits signals with different waveforms for the same pixel of consecutive frames to avoid a return signal overlapping with a noise spike or a frequency component of another return signal. The different waveforms can be formed using different frequency modulations, different amplitude modulations, or a combination thereof for the same pixel of consecutive frames. The lidar system can change the waveform of the transmit signal for the same pixel of a subsequent frame automatically or in response to determining that a signal-to-noise ratio of the return signal of an initial frame is below a threshold value. In this way, the lidar system can increase the signal-to-noise ratios in return signals. These improvements allow the lidar system to increase its accuracy in determining the characteristics of objects that reflected the return signals.

公开(公告)号：US11940566B2

公开(公告)日：2024-03-26

申请号：US16923067

申请日：2020-07-07

申请人： SiLC Technologies, Inc.

发明人： Mehdi Asghari ,  Bradley Jonathan Luff

IPC分类号： G01C3/08 ,  G01S7/4911 ,  G01S7/4913 ,  G01S17/34

CPC分类号： G01S7/4913 ,  G01S7/4911 ,  G01S17/34

摘要： A LIDAR system includes one or more optical components that output multiple system output signals. The system also includes electronics that use light from the system output signals to generate LIDAR data. The LIDAR data indicates a distance and/or radial velocity between the LIDAR system and one or more object located outside of the LIDAR system. The electronics including a series processing component that processes electrical signals that are each generated from one of the system output signals. The series processing component processes the electrical signals generated from different system output signals in series.

公开(公告)号：US20240053452A1

公开(公告)日：2024-02-15

申请号：US18265727

申请日：2021-12-07

申请人： Illusense, Inc.

发明人： Kyzyl Herzog ,  William Bowden ,  Kirk W. Madison

IPC分类号： G01S7/4913 ,  G01S17/50 ,  G01S7/4915 ,  G01S7/4912

CPC分类号： G01S7/4913 ,  G01S17/50 ,  G01S7/4915 ,  G01S7/4917

摘要： A method and an apparatus for determining a signed Doppler frequency shift of an optical signal. The method comprises generating a reference signal having a reference optical spectrum and a transmission signal having a transmission optical spectrum; directing the transmission signal to at least one target; receiving a reflection signal from the at least one target, the reflection signal having a reflection optical spectrum; estimating the reflection optical spectrum; and based on the estimated reflection optical spectrum and the reference optical spectrum, determining a signed Doppler frequency shift of the reflection optical spectrum, wherein at least one of the transmission optical spectrum and the reference optical spectrum comprises a first component having a first frequency and a first amplitude, and a second component having a second frequency, different from the first frequency, and a second amplitude, different from the first amplitude, and wherein the at least one of the transmission optical spectrum and the reference optical spectrum is asymmetric about the midpoint of the reference optical spectrum.

公开(公告)号：US20240019553A1

公开(公告)日：2024-01-18

申请号：US18364994

申请日：2023-08-03

申请人： Aeva, Inc.

发明人： Behsan Behzadi ,  Omer P. Kocaoglu ,  Keith Gagne ,  Oguzhan Avci ,  Neal N. Oza ,  Mina Rezk

IPC分类号： G01S7/481 ,  G01S17/34 ,  G01S7/4913 ,  G01S17/58 ,  G01S17/89 ,  G02B27/28 ,  G02B27/30

CPC分类号： G01S7/4817 ,  G01S17/34 ,  G01S7/4811 ,  G01S7/4913 ,  G01S17/58 ,  G01S17/89 ,  G02B27/283 ,  G02B27/30

摘要： A light detection and ranging (LIDAR) apparatus including free space optics to combine a target signal and a local oscillator signal to generate a combined signal. The LIDAR system also includes a set of multi-mode (MM) waveguides and a demultiplexer including a dispersive element. The demultiplexer configured to disperse, via the dispersive element, each respective wavelength of the combined signal at a corresponding angle, and reflect each respective wavelength of the combined signal to a corresponding MM waveguide of the set of MM waveguides.

公开(公告)号：US11815599B2

公开(公告)日：2023-11-14

申请号：US17919632

申请日：2021-04-21

申请人： MOURO LABS S.L.

发明人： Eduardo Margallo Balbás

IPC分类号： G01P3/36 ,  G01S17/34 ,  G01S7/4913 ,  G01S7/4912

CPC分类号： G01S17/34 ,  G01S7/4913 ,  G01S7/4917

摘要： A LIDAR system which reduces or suppress the frequency shift induced by the movement of objects in a scene relative to the LIDAR, and which comprises a light source, an input aperture (101), a splitter (2) configured to split a reflected light into a reference channel (4) and a first imaging channel (3), a first imaging optical IQ receiver (5) configured to obtain a first interference signal, a reference optical IQ receiver (6) configured to obtain a reference interference signal, an imaging oscillator (111), configured to be temporarily coherent with the reflected light, at least a mixer (12), connected to the first imaging optical IQ (5) and to the reference optical IQ (6) and configured to obtain a first intermodulation product with a higher frequency and an intermodulation product of interest with its Doppler Shift scaled.