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    Photodetector device
    2.
    发明授权
    Photodetector device 有权

    公开(公告)号：US11774283B2

    公开(公告)日：2023-10-03

    申请号：US16963303

    申请日：2019-01-24

    Applicant: HAMAMATSU PHOTONICS K.K.

    Inventor： Takashi Baba ,  Tatsuya Hashi ,  Yoshihito Suzuki ,  Kenji Makino ,  Shigeyuki Nakamura

    IPC: G01J1/44 ,  G01S7/4863 ,  G01S7/4865 ,  G01S17/894

    CPC classification number: G01J1/44 ,  G01S7/4863 ,  G01S7/4865 ,  G01J2001/448 ,  G01J2001/4466 ,  G01S17/894

    Abstract: A photodetector device includes an avalanche photodiode array substrate. A circuit substrate includes time measurement circuits and a clock driver. Each of the time measurement circuit includes a delay line unit, and is arranged to acquire, from an operation result of a delay line, time information indicating timing at which a pulse signal is input from a corresponding avalanche photodiode. The delay line unit is arranged to initiate an operation of the delay line in response to input of the pulse signal to the time measurement circuit, and to stop the operation of the delay line in response to input of a clock signal from a clock driver to the time measurement circuit, and is arranged to detect a time interval shorter than a cycle of the clock signal by the operation of the delay line.

    Light detection module for OCT device and OCT device
    7.
    发明授权
    Light detection module for OCT device and OCT device 有权

    公开(公告)号：US10168140B2

    公开(公告)日：2019-01-01

    申请号：US15516699

    申请日：2015-10-08

    Applicant: HAMAMATSU PHOTONICS K.K.

    Inventor： Kenji Makino ,  Masato Inagaki ,  Kei Tabata

    IPC: G01B9/02 ,  G01J1/04

    Abstract: A light detecting module that detects interference light that has exited an exit end surface of an optical fiber in an OCT instrument includes: a ball lens including an incident surface entered by the interference light that has exited the exit end surface, and an exit surface exited by the interference light that has entered the incident surface; and a photodiode including a detecting surface entered by the interference light that has exited the exit surface. The interference light obliquely enters the incident surface with respect to a perpendicular line at an incident position of the interference light. The interference light obliquely exits the exit surface with respect to a perpendicular line at an exit position of the interference light. The interference light obliquely enters the detecting surface with respect to a perpendicular line at an incident position of the interference light.

    PHOTODETECTOR DEVICE
    8.
    发明公开
    PHOTODETECTOR DEVICE 审中-公开

    公开(公告)号：US20230358607A1

    公开(公告)日：2023-11-09

    申请号：US18223277

    申请日：2023-07-18

    Applicant: Hamamatsu Photonics K.K.

    Inventor： Takuya FUJITA ,  Yusei Tamura ,  Kenji Makino ,  Takashi Baba ,  Koel Yamamoto

    IPC: G01J1/44 ,  H01L27/144 ,  H01L31/02 ,  H01L31/107

    CPC classification number: G01J1/44 ,  H01L27/1446 ,  H01L31/02027 ,  H01L31/107 ,  G01J2001/442 ,  G01J2001/4466

    Abstract: A photodetector device includes an avalanche photodiode array substrate formed from compound semiconductor. A plurality of avalanche photodiodes arranged to operate in a Geiger mode are two-dimensionally arranged on the avalanche photodiode array substrate. A circuit substrate includes a plurality of output units which are connected to each other in parallel to form at least one channel. Each of the output units includes a passive quenching element and a capacitative element. The passive quenching element is connected in series to at least one of the plurality of avalanche photodiodes. The capacitative element is connected in series to at least one of the avalanche photodiodes and is connected in parallel to the passive quenching element.

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