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81 US2020033457A1
SYSTEM FOR DETERMINING A DISTANCE TO AN OBJECT
Publication/Patent Number: US2020033457A1 Publication Date: 2020-01-30 Application Number: 16/337,331 Filing Date: 2017-10-03 Inventor: Van, Dyck Dirk   Van, Den Bossche Johan   Assignee: XenomatiX NV   IPC: G01S7/486 Abstract: The invention pertains to a system for determining a distance, comprising: a light source for projecting a pattern of discrete spots of laser light towards the object in a sequence of pulses; a detector comprising picture elements, for detecting light representing the pattern as reflected by the object in synchronization with the sequence of pulses; and processing means to calculate the distance to the object as a function of exposure values generated by said picture elements. The picture elements generate the exposure values by accumulating a first amount of electrical charge representative of a first amount of light reflected during a first time window and a second electrical charge representative of a second amount of light reflected during a second time window, the second time window occurring after the first time window. The picture elements comprise at least two sets of charge storage wells, each configured as a cascade.
82 US202033478A1
SYSTEM AND METHOD FOR DETERMINING A DISTANCE TO AN OBJECT
Publication/Patent Number: US202033478A1 Publication Date: 2020-01-30 Application Number: 20/171,633 Filing Date: 2017-10-03 Inventor: Van, Dyck Dirk   Van, Den Bossche Johan   Assignee: XENOMATIX NV   IPC: G01S17/93 Abstract: The invention pertains to a system for determining a distance, comprising: a light source for projecting a pattern of discrete spots of laser light towards the object in a sequence of pulses; a detector comprising picture elements, for detecting light representing the pattern as reflected by the object in synchronization with the sequence of pulses; and processing means to calculate the distance to the object as a function of exposure values generated by said picture elements. The picture elements generate exposure values by accumulating a first amount of electrical charge representing a first amount of light reflected during a first time window and a second electrical charge representating a second amount of light reflected during a second time window. The system projects and detects for at least two consecutive sequences of pulses, each being operated with a different duration of said first time window and said second time window.
83 US202018832A1
PHOTODETECTOR AND DISTANCE MEASUREMENT APPARATUS
Publication/Patent Number: US202018832A1 Publication Date: 2020-01-16 Application Number: 20/191,658 Filing Date: 2019-09-26 Inventor: Ozaki, Noriyuki   Kashiwada, Shinji   Hiratsuka, Shigeyoshi   Matsubara, Hiroyuki   Azuma, Kenta   Takai, Isamu   Ohta, Mitsuhiko   Kimura, Teiyu   Assignee: DENSO CORPORATION   IPC: H01L31/107 Abstract: A photodetector includes plural detectors. Each of the plural detectors has a single photon avalanche diode (hereinafter referred to as SPAD) which responds to incidence of a photon. The plural detectors include at least a first detector and a second detector. The SPAD has a recovery time period until the SPAD reaches a next photon-responsive state, in response to the SPAD responding to the incidence of the photon. The recovery time period of the SPAD in the first detector is different from the recovery time period of the SPAD in the second detector.
84 US202041688A1
OPTICAL SYSTEM FOR MONITORING THE MOVEMENT OF PEOPLE THROUGH A PASSAGEWAY
Publication/Patent Number: US202041688A1 Publication Date: 2020-02-06 Application Number: 20/181,649 Filing Date: 2018-04-17 Inventor: Huff, Derek   Assignee: INTEGRATED DESIGN LIMITED   IPC: G01S7/486 Abstract: A system for monitoring the movement of people through a passageway comprising two or more time of flight sensors deployed across the passageway in a direction substantially transverse to the direction of movement of a person or object through the passageway. The system further comprises means to determine data regarding people or objects passing through the passageway based on the time of flight of a signal measured by the two or more sensors.
85 US202041646A1
LIGHT RANGING DEVICE WITH ELECTRONICALLY SCANNED EMITTER ARRAY AND SYNCHRONIZED SENSOR ARRAY
Publication/Patent Number: US202041646A1 Publication Date: 2020-02-06 Application Number: 20/191,659 Filing Date: 2019-10-04 Inventor: Frichtl, Mark   Pacala, Angus   Assignee: Ouster, Inc.   IPC: G01S17/08 Abstract: Embodiments describe a solid state electronic scanning LIDAR system that includes a scanning focal plane transmitting element and a scanning focal plane receiving element whose operations are synchronized so that the firing sequence of an emitter array in the transmitting element corresponds to a capturing sequence of a photosensor array in the receiving element. During operation, the emitter array can sequentially fire one or more light emitters into a scene and the reflected light can be received by a corresponding set of one or more photosensors through an aperture layer positioned in front of the photosensors. Each light emitter can correspond with an aperture in the aperture layer, and each aperture can correspond to a photosensor in the receiving element such that each light emitter corresponds with a specific photosensor in the receiving element.
86 US10656252B1
Adaptive control of Ladar systems using spatial index of prior Ladar return data
Publication/Patent Number: US10656252B1 Publication Date: 2020-05-19 Application Number: 16/356,046 Filing Date: 2019-03-18 Inventor: Dussan, Luis Carlos   Steinhardt, Allan   Presutti, Federico   Benscoter, Joel David   Assignee: AEYE, INC.   IPC: G01C3/08 Abstract: Disclosed herein are examples of ladar systems and methods where data about a plurality of ladar returns from prior ladar pulse shots gets stored in a spatial index that associates ladar return data with corresponding locations in a coordinate space to which the ladar return data pertain. This spatial index can then be accessed by a processor to retrieve ladar return data for locations in the coordinate space that are near a range point to be targeted by the ladar system with a new ladar pulse shot. This nearby prior ladar return data can then be analyzed by the ladar system to help define a parameter value for use by the ladar system with respect to the new ladar pulse shot. Examples of such adaptively controlled parameter values can include shot energy, receiver parameters, shot selection, camera settings, and others.
87 US2020018830A1
LIGHT DETECTION AND RANGING SENSOR UNIT
Publication/Patent Number: US2020018830A1 Publication Date: 2020-01-16 Application Number: 16/411,791 Filing Date: 2019-05-14 Inventor: Wagner, Horst   Bojarski, Bernard J.   Assignee: Conti Temic microelectronic GmbH   Continental Automotive GmbH   IPC: G01S7/486 Abstract: A light detection and ranging (“Lidar”) sensor unit having a light signal source, a two dimensional array of a plurality of light sensitive detectors converting impinging light into an electronic signal, a readout integrated circuit, and a processing unit. The readout integrated circuit including a plurality of memory units, each memory unit having an input connected to an output of one of said light sensitive detectors for receiving the electronic signal of the light sensitive detector. Each memory unit also including at least one array with I columns and J rows of analog memory cells, one column select line per column and one row select line per row. Each analog memory cell including an AND-gate with a first input being connected to the corresponding column select line and a second input being connected to the corresponding row select line to select the analog memory cell for write and read.
88 US2020057151A1
INTEGRATED LIDAR IMAGE-SENSOR DEVICES AND SYSTEMS AND RELATED METHODS OF OPERATION
Publication/Patent Number: US2020057151A1 Publication Date: 2020-02-20 Application Number: 16/542,696 Filing Date: 2019-08-16 Inventor: Finkelstein, Hod   Dehlinger, Dietrich   Burroughs, Scott   Fisher, Brent   Assignee: Sense Photonics, Inc.   IPC: G01S7/486 Abstract: A Light Detection and Ranging (LIDAR) apparatus includes a detector having a first pixel and a second pixel configured to output respective detection signals responsive to light incident thereon, and receiver optics configured to collect the light over a field of view and direct first and second portions of the light to the first and second pixels, respectively. The first pixel includes one or more time of flight (ToF) sensors, and the second pixel includes one or more image sensors. At least one of the receiver optics or arrangement of the first and second pixels in the detector is configured to correlate the first and second pixels such that depth information indicated by the respective detection signals output from the first pixel is correlated with image information indicated by the respective detection signals output from the second pixel. Related devices and methods of operation are also discussed.
89 US2020096619A1
TIME OF FLIGHT SENSOR
Publication/Patent Number: US2020096619A1 Publication Date: 2020-03-26 Application Number: 16/495,830 Filing Date: 2018-03-21 Inventor: Morcom, Christopher John   Assignee: Photonic Vision Limited   IPC: G01S7/486 Abstract: A time of flight sensor has an image region (8) and a storage region (10) on a device which may be a CCD. A pulse of light illuminates an object, and an image illumination stripe is recorded on the image region. In a distance determining step, the image region is clocked after emitting the pulse of light and the row in which the image illumination stripe is illuminated gives a measure of the distance to the object. The apparatus can self calibrate by emitting a pulse of light without clocking the image region.
90 US2020233067A1
ELECTROMAGNETIC WAVE DETECTION APPARATUS, PROGRAM, AND ELECTROMAGNETIC WAVE DETECTION SYSTEM
Publication/Patent Number: US2020233067A1 Publication Date: 2020-07-23 Application Number: 16/486,962 Filing Date: 2018-02-08 Inventor: Okada, Hiroki   Uchida, Eri   Minagawa, Hiroyuki   Takayama, Yoshiteru   Ono, Mitsuo   Hasebe, Atsushi   Kawai, Katsutoshi   Kanayama, Yukitoshi   Assignee: KYOCERA Corporation   IPC: G01S7/4863 Abstract: An electromagnetic wave detection apparatus (10) includes an irradiator (11), a first detector (17), a memory (19), and a controller (20). The irradiator (11) irradiates electromagnetic waves. The first detector (17) includes detection elements. The detection elements detect, by irradiation position, reflected waves of the electromagnetic waves irradiated on an object (ob). The memory (19) stores first related information including an emission direction of the emitted electromagnetic waves. The controller (20) updates the first related information based on the position of the detection element, among the detection elements, that detects the reflected waves of the electromagnetic waves.
91 US10739445B2
Parallel photon counting
Publication/Patent Number: US10739445B2 Publication Date: 2020-08-11 Application Number: 16/415,748 Filing Date: 2019-05-17 Inventor: Hollmann, Joseph   Hoffman, Zachary R.   Assignee: The Charles Stark Draper Laboratory, Inc.   IPC: G01C3/08 Abstract: A method of lidar processing pulses a scene with laser pulse sequences from a laser light source. Reflected light from the target scene passes through receiver optics and is defocused to cover a light sensing surface of a photo detector array. The photo detector array contains multiple photon detector elements connected in parallel where each photon detector element is configured to generate corresponding photon pulse output signals based on sensing photons in the received reflected light, and each photon detector element is characterized by a non-responsive dead time period immediately after sensing a photon. The photon pulse output signals are combined to form a common real time output signal, which is converted to a digital time resolved histogram. Multiple digital time resolved histograms produced in response to multiple light pulses directed at a scanning location are combined to form a composite time resolved histogram for the scanning location.
92 US2020233068A1
DIGITAL PIXELS AND OPERATING METHODS THEREOF
Publication/Patent Number: US2020233068A1 Publication Date: 2020-07-23 Application Number: 16/746,218 Filing Date: 2020-01-17 Inventor: Henderson, Robert   Al, Abbas Tarek   Calder, Neil   Assignee: The University Court of The University of Edinburgh   Sense Photonics, Inc.   IPC: G01S7/4863 Abstract: A Light Detection and Ranging (LIDAR) measurement circuit includes an array of single photon detectors configured to detect photons responsive to emission of an optical signal from an emitter, and a pixel processing circuit that is configured to calculate an estimated time of arrival of photons incident on the array of single photon detectors by utilizing a plurality of coarse histogram bins. Respective ones of the plurality of coarse histogram bins are associated with a duration that is greater than one-sixteenth of a pulse width of the optical signal.
93 US2020264285A1
TIME-OF-FLIGHT APPARATUS AND METHOD
Publication/Patent Number: US2020264285A1 Publication Date: 2020-08-20 Application Number: 16/791,584 Filing Date: 2020-02-14 Inventor: Ding, Qing   Van, Der Tempel Ward   Assignee: Sony Semiconductor Solutions Corporation   IPC: G01S7/4863 Abstract: A time-of-flight apparatus having a light detector for detecting light reflected from a scene, wherein the light detector has at least one light detection element; and circuitry configured to acquire light detection events for the at least one light detection element at selected points of time of a set of predetermined number of consecutive times, wherein the selection of the points of time is based on a time compressive sampling.
94 JP6644892B2
光検出測距センサ
Publication/Patent Number: JP6644892B2 Publication Date: 2020-02-12 Application Number: 2018530709 Filing Date: 2016-12-08 Inventor: オジエ, ティエリー   アグラノフ, ゲンナディー エイ   シュプント, アレクサンダー   レツク, ミナ エイ   ウォルドン, マシュー シー   ニクラス, クリスティアーノ エル   Assignee: アップル インコーポレイテッドApple Inc.   IPC: G01S17/10 Abstract: 電気光学装置(18)は、光パルスの少なくとも1つのビームを放射するレーザ光源(20)と、対象シーン(22)にわたって少なくとも1つのビームを送信及び走査するビームステアリング装置(24)と、感知素子(44)のアレイ(28)を含む。各感知素子は、単一光子の感知素子への入射時間を示す信号を出力する。集光光学系(27)は、送信されたビームによって走査された対象シーンをアレイ上に結像する。回路(50)は、アレイの選択された領域(70)内でのみ感知素子を作動させ、少なくとも1つのビームの走査に同期してアレイの上の選択された領域を掃引するように結合される。【選択図】図4
95 ES2739712T3
Procedimiento para la detección de radiación láser pulsada, así como avisador de láser productor de imágenes
Publication/Patent Number: ES2739712T3 Publication Date: 2020-02-03 Application Number: 12005946 Filing Date: 2012-08-18 Inventor: Scherbarth, Stefan   Rudow, Oliver   Assignee: HENSOLDT Sensors GmbH   IPC: G01S7/486
96 US202003876A1
A SYSTOLIC PROCESSOR SYSTEM FOR A LIGHT RANGING SYSTEM
Publication/Patent Number: US202003876A1 Publication Date: 2020-01-02 Application Number: 20/181,648 Filing Date: 2018-02-20 Inventor: Zalud, Peter Ferdinand   Assignee: SRI International   IPC: G01S17/89 Abstract: A ROIC can perform systolic processing of light detectors. The ROIC performs the systolic processing of the light detectors to capture at least i) when, in time units, an initial photon of its reflected light pulse is captured by each of the light detectors in the array, ii) where geographically in terms of column and row address of the light detector capturing its photon is located in the array, iii) scan out data captured by the light detectors on the when in time units, and the where geographically that the photon was captured in a given light detector in the array, and then iv) analyze the data on the when and the where with an algorithm to know exactly when exactly, in terms of time units, the photon was captured relative to the input from the clock circuit in order to determine an objects characteristics.
97 US10754015B2
Adaptive ladar receiver
Publication/Patent Number: US10754015B2 Publication Date: 2020-08-25 Application Number: 15/430,192 Filing Date: 2017-02-10 Inventor: Dussan, Luis Carlos   Steinhardt, Allan   Cook, David   Assignee: AEYE, INC.   IPC: G01S7/486 Abstract: Disclosed herein are various embodiment of an adaptive ladar receiver and associated method whereby the active pixels in a photodetector array used for reception of ladar pulse returns can be adaptively controlled based at least in part on where the ladar pulses were targeted. Additional embodiments disclose improved imaging optics for use by the receiver and further adaptive control techniques for selecting which pixels of the photodetector array are used for sensing incident light.
98 US2020278429A1
Management of Histogram Memory for a Single-Photon Avalanche Diode Detector
Publication/Patent Number: US2020278429A1 Publication Date: 2020-09-03 Application Number: 16/877,121 Filing Date: 2020-05-18 Inventor: Mandai, Shingo   Niclass, Cristiano L.   Assignee: Apple Inc.   IPC: G01S7/4863 Abstract: A single-photon avalanche diode (SPAD) detector includes a pixel array comprising multiple pixels and a memory operably connected to the pixel array. Each pixel includes a SPAD. Various techniques for accumulating signals received from the same SPAD over multiple scans and storing the accumulated signals in the memory are disclosed.
99 US10761196B2
Adaptive ladar receiving method
Publication/Patent Number: US10761196B2 Publication Date: 2020-09-01 Application Number: 15/430,179 Filing Date: 2017-02-10 Inventor: Dussan, Luis Carlos   Steinhardt, Allan   Cook, David   Assignee: AEYE, INC.   IPC: G01S7/486 Abstract: Disclosed herein are various embodiment of an adaptive ladar receiver and associated method whereby the active pixels in a photodetector array used for reception of ladar pulse returns can be adaptively controlled based at least in part on where the ladar pulses were targeted. Additional embodiments disclose improved imaging optics for use by the receiver and further adaptive control techniques for selecting which pixels of the photodetector array are used for sensing incident light.
100 US2020300985A1
LIGHT RECEIVING DEVICE AND RANGE FINDING DEVICE
Publication/Patent Number: US2020300985A1 Publication Date: 2020-09-24 Application Number: 16/561,446 Filing Date: 2019-09-05 Inventor: Kubota, Hiroshi   Matsumoto, Nobu   Assignee: Kabushiki Kaisha Toshiba   Toshiba Electronic Devices & Storage Corporation   IPC: G01S7/486 Abstract: A light receiving device includes a light receiver including pixels and a light receiving area. The pixels are arranged in an array in a first direction and in a second direction intersecting with the first direction and each of the pixels has one light receiving element or more. The light receiving area has continuous pixels out of the pixels, outputs signals based on intensities of light received in the continuous pixels, and is changed in position in the light receiver according to a signal indicating a position in the first direction and a position in the second direction.