公开(公告)号：US20170115392A1

公开(公告)日：2017-04-27

申请号：US15316935

申请日：2015-05-28

Applicant: HAMAMATSU PHOTONICS K.K.

Inventor： Mitsuhito MASE ,  Jun HIRAMITSU ,  Akihiro SHIMADA

IPC: G01S17/10 ,  G01S17/89 ,  G01S7/486

CPC classification number: G01S17/10 ,  G01S7/4816 ,  G01S7/4817 ,  G01S7/4863 ,  G01S7/4865 ,  G01S7/487 ,  G01S17/42 ,  G01S17/89 ,  H01L27/14603 ,  H01L27/14612 ,  H04N5/369

Abstract: In accordance with an irradiation position of pulsed light, a selecting unit outputs a first transfer signal to a first transfer electrodes and outputs a second transfer signal to a second transfer electrodes, to allow signal charges to flow into first and second signal charge-collecting regions of a pixel corresponding to the irradiation position, and outputs a third transfer signal to a third transfer electrodes to allow unnecessary charges to flow into an unnecessary charge-discharging regions of a pixel other than the pixel corresponding to the irradiation position. An arithmetic unit reads out signals corresponding to respective quantities of signal charges collected in the first and second signal charge-collecting regions of the pixel selected by the selecting unit, and calculates a distance to an object based on a ratio between a quantity of signal charges collected in the first signal charge-collecting regions and a quantity of signal charges collected in the second signal charge-collecting regions.

公开(公告)号：US20240305907A1

公开(公告)日：2024-09-12

申请号：US18272611

申请日：2022-01-13

Applicant: HAMAMATSU PHOTONICS K.K.

Inventor： Keisuke UCHIDA ,  Munenori TAKUMI ,  Hisayoshi TAKAMOTO ,  Naoaki KATO ,  Katsuhiro NAKAMOTO ,  Mitsuhito MASE

IPC: H04N25/705 ,  G01S7/4863 ,  G01S7/4865 ,  H04N25/771

CPC classification number: H04N25/705 ,  G01S7/4863 ,  G01S7/4865 ,  H04N25/771

Abstract: A distance image acquisition apparatus includes a light source, an irradiation optical system, an imaging optical system, an imaging element, and a processing unit. The imaging element receives a light pulse output from the light source, reflected by an object, and passed through the imaging optical system on a light receiving surface. Each of a plurality of pixels on the light receiving surface includes a photodiode for generating charges by receiving light, and a charge accumulation portion for accumulating the charges generated in the photodiode. The processing unit commonly applies a control pattern to the plurality of pixels. The control pattern indicates a period in which the charges generated in the photodiode are accumulated in the charge accumulation portion. The processing unit acquires a distance image of the object based on an amount of charges generated in the photodiode and accumulated in the charge accumulation portion.

公开(公告)号：US20230083427A1

公开(公告)日：2023-03-16

申请号：US17798377

申请日：2021-01-21

Applicant: HAMAMATSU PHOTONICS K.K.

Inventor： Mitsuhito MASE ,  Masatoshi FUJIMOTO ,  Tomofumi SUZUKI

IPC: G01B9/02091 ,  G01N21/17

Abstract: An optical coherence tomography device includes a light source, a mirror device including a movable mirror configured to perform a reciprocating operation, a support part configured to support an object, a beam splitter configured to generate interfering light, an optical sensor configured to detect the interfering light, and a control unit. Each of the plurality of pixels included in the optical sensor includes a light receiving part, a plurality of transfer gates, and a discharge gate. The control unit applies an electric signal to the optical sensor so that the plurality of transfer gates are sequentially brought into a charge transfer state in at least three time ranges separated from each other and the discharge gate is brought into a charge discharge state in a time range other than the at least three time ranges for each period of an interferogram signal of the interfering light.

公开(公告)号：US20230048727A1

公开(公告)日：2023-02-16

申请号：US17788000

申请日：2020-12-07

Applicant: HAMAMATSU PHOTONICS K.K.

Inventor： Mitsuhito MASE ,  Jun HIRAMITSU ,  Akihiro SHIMADA ,  Hiroaki ISHII ,  Toshinori ITO ,  Yuma TANAKA

IPC: G01S17/89 ,  G01S7/481

Abstract: In a ranging image sensor, each pixel includes an avalanche multiplication region, a charge distribution region, a pair of first charge transfer regions, a pair of second charge transfer regions, a well region, a photogate electrode, a pair of first transfer gate electrodes, and a pair of second transfer gate electrodes. The first multiplication region of the avalanche multiplication region is formed so as to overlap the charge distribution region and so as not to overlap the well region in the Z direction. The second multiplication region of the avalanche multiplication region is formed so as to overlap the charge distribution region and the well region in the Z direction.

公开(公告)号：US20200333459A1

公开(公告)日：2020-10-22

申请号：US16097664

申请日：2017-04-19

Applicant: HAMAMATSU PHOTONICS K.K.

Inventor： Akihiro SHIMADA ,  Mitsuhito MASE ,  Jun HIRAMITSU ,  Takashi SUZUKI

IPC: G01S17/10 ,  G01S7/481 ,  H01L27/144

Abstract: The present embodiment relates to a distance sensor that reduces a difference in amounts of current injected into each of plural charge collection regions prepared for one photosensitive region in order to avoid saturation caused by disturbance light. A current injection circuit injecting current into each charge collection region includes a voltage generation circuit generating a control voltage for adjustment of the injected current amount, and the voltage generation circuit generates the control voltage corresponding to a large amount of charge between the charge amounts of storage nodes coupled, respectively, to the charge collection regions. Meanwhile, a cascode device is disposed between a transistor configured to adjust the amount of current according to the control voltage and the storage node, and a potential of a current output end of the transistor and a potential of the storage node are separated.

公开(公告)号：US20190145767A1

公开(公告)日：2019-05-16

申请号：US16098187

申请日：2017-04-19

Applicant: HAMAMATSU PHOTONICS K.K.

Inventor： Akihiro SHIMADA ,  Mitsuhito MASE ,  Jun HIRAMITSU ,  Takashi SUZUKI

IPC: G01C3/06 ,  G01S17/10 ,  G01S17/89 ,  G01S7/486 ,  H01L27/146 ,  H04N5/357 ,  H04N5/374

Abstract: The present embodiment relates to a distance sensor configured to inject an equal amount of current into storage nodes coupled, respectively, to charge collection regions where charges of a photosensitive region is distributed by driving of first and second transfer electrodes and obtain a distance to an object based on difference information on charge amounts of the respective storage nodes. Saturation caused by disturbance light of each storage node is avoided by injecting the equal amount of current to each storage node, and the difference information on the charge amounts of the respective storage nodes, which is not easily affected by the current injection, is obtained by driving the first and second transfer electrodes according to the plurality of frames representing the electrode drive pattern, respectively.

公开(公告)号：US20180210069A1

公开(公告)日：2018-07-26

申请号：US15749516

申请日：2016-06-21

Applicant: HAMAMATSU PHOTONICS K.K.

Inventor： Mitsuhito MASE ,  Shinya IWASHINA ,  Takashi SUZUKI

IPC: G01S7/486 ,  G01S17/10 ,  H01L31/107 ,  H01L31/167

CPC classification number: G01S7/486 ,  G01S7/4861 ,  G01S17/10 ,  G01S17/42 ,  G01S17/936 ,  H01L31/107 ,  H01L31/167

Abstract: A distance measuring device is configured to measure a distance to an object. The distance measuring device includes a light source configured to emit a projection beam to the object and a light receiving element configured to detect return light of the projection beam that is reflected by the object. The light source is a laser light source configured to emit pulsed light in an ultraviolet range to a blue color range as the projection beam, and the light receiving element is an avalanche photodiode that has spectral sensitivity in an ultraviolet range to a blue color range and operates in a Geiger mode.

公开(公告)号：US20170045618A1

公开(公告)日：2017-02-16

申请号：US15306814

申请日：2015-04-07

Applicant: HAMAMATSU PHOTONICS K.K.

Inventor： Mitsuhito MASE ,  Jun HIRAMITSU ,  Akihiro SHIMADA

IPC: G01S17/10 ,  G01S7/484 ,  G01S7/486 ,  H01L27/146

CPC classification number: G01S17/10 ,  G01C3/06 ,  G01S7/484 ,  G01S7/4863 ,  G01S7/4865 ,  G01S17/89 ,  H01L27/146 ,  H01L31/12 ,  H04N5/335

Abstract: In a ranging device, a controlling unit alternatively switches orders in time series of a first pulse-transfer-signal and a second pulse-transfer-signal per frame term and outputs the first and second pulse-transfer-signals. Furthermore, an arithmetic unit arithmetizes a distance to an object based on total quantities of charges of signal charges, in two frame term consecutive in the time series, accumulated in a first charge-accumulating region and a second charge-accumulating region in accordance with the first and second pulse-transfer-signals having an identical phase.

Abstract translation: 在测距装置中，控制单元交替地按照每帧项的第一脉冲传送信号和第二脉冲传送信号的时间序列切换命令，并输出第一和第二脉冲传送信号。 此外，算术单元根据累积在第一电荷累积区域和第二电荷累积区域中的时间序列连续的两个帧项，基于信号电荷的总量计算与物体的距离， 具有相同相位的第一和第二脉冲传送信号。