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公开(公告)号：US11588551B2
公开(公告)日：2023-02-21
申请号：US17105368
申请日：2020-11-25
申请人： Raytheon Company
IPC分类号： H04B10/25 , G01S17/26 , G01S7/481 , H04B10/556
摘要： A method includes generating, using a transmitter, an optical signal for each fiber incoherently combined in a fiber bundle. The method also includes transmitting the optical signal from each fiber as pulses at a target. The method further includes receiving, using a receiver array, the pulses of the optical signals and identifying one or more parameters of the target based on the pulses of the optical signals.
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22.发明申请公开(公告)号：US20230021576A1
公开(公告)日：2023-01-26
申请号：US17868906
申请日：2022-07-20
发明人： Daniel Joseph Klemme , Aditya Jain
IPC分类号： G01S7/481 , G01S17/26 , G02B6/12 , G01S7/4914
摘要： Method and apparatus for enhancing resolution in a light detection and ranging (LiDAR) system. In some embodiments, an emitter emits light in the form of multiplexed beams of randomized, multiple wavelengths across a field of view (FoV). A detector uses one or more detection channels to detect the multiplexed beams reflected from a target within the FoV to decode range information associated with the target. The multiplexed beams may be generated by multiple light sources such as laser diodes, or a single source such as a frequency comb device. Randomization may be applied via a pseudorandom bit sequence modulator, and multiplexing/demultiplexing may be performed using waveguides and micro-resonance rings (MRRs). The multiplexed beam may be emitted using an optical phase array (OPA) integrated circuit device to scan the FoV simultaneously using the different wavelengths. The range information can be used to adaptively adjust the wavelengths in a subsequent scan.
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公开(公告)号：US20230003883A1
公开(公告)日：2023-01-05
申请号：US17853475
申请日：2022-06-29
发明人： Daniel Joseph Klemme , Aditya Jain
IPC分类号： G01S17/26
摘要： A light detection and ranging system can have a controller connected to a light beam emitter. To provide enhanced resolution compared to frequency modulated continuous wave light detection and ranging systems, the controller may be configured to provide coherent light detection and ranging by utilizing pixel-based phase modulated continuous wave light emission from the emitter.
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公开(公告)号：US20220390561A1
公开(公告)日：2022-12-08
申请号：US17870566
申请日：2022-07-21
发明人： Zeb Barber , Randy Reibel , Devlin Baker , Emil Kadlec
摘要： In some implementations, a light detection and ranging (LIDAR) system includes a laser source configured to provide an optical signal at a first signal power, an amplifier having a plurality of gain levels, at which the amplifier is configured to amplify the optical signal, and one or more processors. The one or more processors are configured to, based on the first signal power and a duty cycle of the optical signal, vary a gain level of the amplifier from the plurality of gain levels to generate a pulse signal, transmit the pulse signal from the amplifier to an environment, receive a reflected signal that is reflected from an object, responsive to transmitting the pulse signal, and determine a range to the object based on an electrical signal associated with the reflected signal.
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25.发明申请公开(公告)号：US20220373681A1
公开(公告)日：2022-11-24
申请号：US17318624
申请日：2021-05-12
发明人： Sunil Khatana , Tyler Banas
摘要： Disclosed herein are systems and methods for linearizing frequency chirp in a frequency-modulated continuous wave (FMCW) coherent LiDAR system. Exemplary methods can include generating a continuous wave laser signal having a frequency characteristic, in which the frequency characteristic can include a frequency chirp over a frequency band in at least one period; and receiving a signal based on the generated laser signal. The methods can further include mixing the received signal with a local oscillator signal, the local oscillator signal having the frequency characteristic; determining at least one beat frequency based on the mixed signal; sampling the mixed signal at a rate equal to at least two times the beat frequency; determining a correction signal based on the sampled signal; and applying the correction signal to the laser signal.
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公开(公告)号：US20220308216A1
公开(公告)日：2022-09-29
申请号：US17490289
申请日：2021-09-30
申请人： AEYE, Inc.
发明人： Naveen Reddy , Allan Steinhardt , Luis Dussan , Joel Benscoter , Alex Liang , Philippe Feru , Igor Polishchuk
摘要： A lidar receiver that includes a photodetector circuit can be controlled so that the detection intervals used by the lidar receiver to detect returns from fired laser pulse shots are closely controlled. Such control over the detection intervals used by the lidar receiver allows for close coordination between a lidar transmitter and the lidar receiver where the lidar receiver is able to adapt to variable shot intervals of the lidar transmitter (including periods of high rate firing as well as periods of low rate firing). The detection intervals can vary across different shots, and at least some of the detection intervals can be controlled to be of different durations than the shot intervals that correspond to such detection intervals.
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公开(公告)号：US20220299641A1
公开(公告)日：2022-09-22
申请号：US17696856
申请日：2022-03-17
申请人： Naoki SHINODA
发明人： Naoki SHINODA
IPC分类号： G01S17/26 , G01S7/4865 , G01S7/4861 , G01S7/484
摘要： A distance measurement apparatus using time of flight, the distance measurement apparatus includes a light source to emit measurement light to an object based on a light-emission timing; a photosensor to receive the measurement light reflected from the object based on a light-receiving timing; and circuitry configured to: output the light-emission timing and the light-receiving timing to the light source and the photosensor, respectively; and calculate a distance to the object based on the measurement light received by the photosensor. The circuitry is further configured to control a phase of the measurement light based on a measurement accuracy fluctuation amount at a measurement target distance in a periodic measurement accuracy fluctuation.
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公开(公告)号：US20220163634A1
公开(公告)日：2022-05-26
申请号：US17612254
申请日：2020-05-27
摘要： An active illumination apparatus includes an emission source configured to illuminate a field of view. The emission source includes one or more emitter elements, and is configured to output optical signals having respective wavelengths that vary based on respective portions of the field of view to be illuminated thereby. The respective wavelengths of the optical signals may vary over respective field angles of the field of view according to variations in optical characteristics of a detection module, such as a passband of a detector-side spectral filter element, for the respective field angles. Related imaging apparatus and methods are also discussed.
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公开(公告)号：US20220120900A1
公开(公告)日：2022-04-21
申请号：US17500829
申请日：2021-10-13
申请人： Waymo LLC
IPC分类号： G01S17/26 , B60W60/00 , G01S7/481 , G01S17/58 , G01S17/931
摘要： The subject matter of this specification relates to a light detection and ranging (LiDAR) device that comprises, in some implementations, a pulsed-laser source configured to generate a pulsed optical signal, a continuous wave (CW) laser source configured to generate a CW optical signal, one or more optical amplifier circuits configured to amplify at least the pulsed optical signal, a combiner configured to combine the pulsed optical signal and the CW optical signal into a hybrid transmission signal, and at least one photodetector configured to receive a reflection signal produced by reflection of the hybrid transmission signal by a target.
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公开(公告)号：US20220091263A1
公开(公告)日：2022-03-24
申请号：US17198636
申请日：2021-03-11
发明人： Masaki Nishikawa
IPC分类号： G01S17/26 , G01S17/42 , G01S17/32 , G01S7/4915
摘要： A phase correcting device of an embodiment includes a local oscillator that includes an all digital phase-locked loop configured to generate a plurality of kinds of local oscillation signals based on a reference clock, and is configured to give one of the local oscillation signals to a device configured to detect a phase of an inputted signal, a phase detector configured to acquire and output, at a predetermined timing, an output of a phase integrator included in the all digital phase-locked loop, and a phase calculator configured to acquire, a plurality of times at predetermined timings, values outputted from the phase detector and correct the phase of the inputted signal by using a difference between the values.
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